CSX CORP
SC 14D1/A, 1997-04-11
RAILROADS, LINE-HAUL OPERATING
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<PAGE>   1
 
================================================================================
 
                       SECURITIES AND EXCHANGE COMMISSION
 
                             WASHINGTON, D.C. 20549
                            ------------------------
 
                                 SCHEDULE 14D-1
                             TENDER OFFER STATEMENT
 
                               (AMENDMENT NO. 24)
 
                                  PURSUANT TO
            SECTION 14(D)(1) OF THE SECURITIES EXCHANGE ACT OF 1934
                                      AND
                                AMENDMENT NO. 34
                                       TO
                                 SCHEDULE 13D++
                                      AND
                                AMENDMENT NO. 11
                                       TO
                                SCHEDULE 13D++++
                            ------------------------
 
                                  CONRAIL INC.
                           (NAME OF SUBJECT COMPANY)
 
                                CSX CORPORATION
                          NORFOLK SOUTHERN CORPORATION
                            GREEN ACQUISITION CORP.
                                   (BIDDERS)
 
                    COMMON STOCK, PAR VALUE $1.00 PER SHARE
                         (TITLE OF CLASS OF SECURITIES)
                                  208368 10 0
                     (CUSIP NUMBER OF CLASS OF SECURITIES)
 
      SERIES A ESOP CONVERTIBLE JUNIOR PREFERRED STOCK, WITHOUT PAR VALUE
                         (TITLE OF CLASS OF SECURITIES)
 
                                 NOT AVAILABLE
                     (CUSIP NUMBER OF CLASS OF SECURITIES)
 
<TABLE>
<S>                                                 <C>
MARK G. ARON                                        JAMES C. BISHOP, JR.
  CSX CORPORATION                                   NORFOLK SOUTHERN CORPORATION
  ONE JAMES CENTER                                  THREE COMMERCIAL PLACE
  901 EAST CARY STREET                              NORFOLK, VIRGINIA 23510
  RICHMOND, VIRGINIA 23219-4031                     TELEPHONE: (757) 629-2750
  TELEPHONE: (804) 782-1400
</TABLE>
 
                 (Name, Address and Telephone Number of Person
     Authorized to Receive Notices and Communications on Behalf of Bidder)
                                WITH A COPY TO:
 
<TABLE>
<S>                                                 <C>
PAMELA S. SEYMON                                    RANDALL H. DOUD
  WACHTELL, LIPTON, ROSEN & KATZ                    SKADDEN, ARPS, SLATE, MEAGHER & FLOM LLP
  51 WEST 52ND STREET                               919 THIRD AVENUE
  NEW YORK, NEW YORK 10019                          NEW YORK, NEW YORK 10022
  TELEPHONE: (212) 403-1000                         TELEPHONE: (212) 735-3000
</TABLE>
 
                            ------------------------
                           CALCULATION OF FILING FEE
================================================================================
 
<TABLE>
<CAPTION>
     TRANSACTION VALUATION*                 AMOUNT OF FILING FEE**
- ---------------------------------      ---------------------------------
<S>                                    <C>
         $8,396,903,710                           $1,679,381
</TABLE>
 
================================================================================
 
 * For purposes of calculating the filing fee only. This calculation assumes the
   purchase of an aggregate of 73,016,554 Shares of Common Stock, par value
   $1.00 per share, and Series A ESOP Convertible Junior Preferred Stock,
   without par value, of Conrail Inc. at $115 net per Share in cash.
** The amount of the filing fee, calculated in accordance with Rule 0-11(d) of
   the Securities Exchange Act of 1934, as amended, equals 1/50th of one percent
   of the aggregate value of cash offered by Green Acquisition Corp. for such
   number of Shares.
 ++ of CSX Corporation and Green Acquisition Corp.
++++ of Norfolk Southern Corporation
                            ------------------------
 
[X]  Check box if any part of the fee is offset as provided by Rule 0-11(a)(2)
     and identify the filing with which the offsetting fee was previously paid.
     Identify the previous filing by registration statement number, or the form
     or schedule and the date of its filing.
 
                  Total Amount Previously Paid: $2,014,438.59
 
<TABLE>
<S>                               <C>                               <C>                               <C>
Amount Previously Paid:           $403,586.59                       Amount Previously Paid:           $1,610,852
Form or Registration No.:         Schedule 14D-1                    Form or Registration No.:         333-19523
Filing Party:                     CSX Corporation and Green         Filing Party:                     CSX Corporation
                                  Acquisition Corp.
Date Filed:                       December 6, 1996                  Date Filed:                       January 10, 1997
</TABLE>
 
================================================================================
<PAGE>   2
 
                                 SCHEDULE 14D-1
 
<TABLE>
<S> <C>                      <C> <C>                                                 <C> <C>                      <C>
- ------------------------------                                                       ------------------------------
      CUSIP NO. 208368 10 0                                                                  PAGE 1 OF 4 PAGES
- ------------------------------                                                       ------------------------------
- --------------------------------------------------------------------------------------------------------------
 
         1       NAMES OF REPORTING PERSONS
                 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                 NORFOLK SOUTHERN CORPORATION (E.I.N.: 52-1188014)
- --------------------------------------------------------------------------------------------------------------
         2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                        (a) [X]
                 (b) [ ]
- --------------------------------------------------------------------------------------------------------------
         3       SEC USE ONLY
- --------------------------------------------------------------------------------------------------------------
 
         4       SOURCE OF FUNDS
                 BK, WC, OO
- --------------------------------------------------------------------------------------------------------------

         5       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
                 PURSUANT TO ITEMS 2(e) or 2(f)                                                        [ ]
- --------------------------------------------------------------------------------------------------------------
 
         6       CITIZENSHIP OR PLACE OF ORGANIZATION
                 VIRGINIA
- --------------------------------------------------------------------------------------------------------------
 
         7       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
                 REPORTING PERSON
                 8,200,100 Common Shares*
- --------------------------------------------------------------------------------------------------------------
         8       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (7) EXCLUDES CERTAIN SHARES                [X]
- --------------------------------------------------------------------------------------------------------------
 
         9       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (7)
                 9.9% of Outstanding Common Shares*
- --------------------------------------------------------------------------------------------------------------
 
        10       TYPE OF REPORTING PERSON
                 HC and CO
- --------------------------------------------------------------------------------------------------------------
</TABLE>
 
- ---------------
* Excludes 17,775,124 Common Shares beneficially owned by CSX Corporation which
  Norfolk Southern Corporation may be deemed to beneficially own by reason of
  the CSX/NSC Letter Agreement referred to herein.
<PAGE>   3
 
                                 SCHEDULE 14D-1
 
<TABLE>
<S> <C>                      <C> <C>                                                 <C> <C>                      <C>
- ------------------------------                                                       ------------------------------
      CUSIP NO. 208368 10 0                                                                  PAGE 2 OF 4 PAGES
- ------------------------------                                                       ------------------------------
- --------------------------------------------------------------------------------------------------------------
 
         1       NAMES OF REPORTING PERSONS
                 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                 ATLANTIC ACQUISITION CORPORATION (E.I.N.: 54-1823555)
- --------------------------------------------------------------------------------------------------------------
         2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                        (a) [X]
                 (b) [ ]
- --------------------------------------------------------------------------------------------------------------
         3       SEC USE ONLY
- --------------------------------------------------------------------------------------------------------------
 
         4       SOURCE OF FUNDS
                 AF
- --------------------------------------------------------------------------------------------------------------
         5       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
                 PURSUANT TO ITEMS 2(e) or 2(f)                                                        [ ]
- --------------------------------------------------------------------------------------------------------------
 
         6       CITIZENSHIP OR PLACE OF ORGANIZATION
                 PENNSYLVANIA
- --------------------------------------------------------------------------------------------------------------
 
         7       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
                 REPORTING PERSON
                 8,200,000 Common Shares*
- --------------------------------------------------------------------------------------------------------------
         8       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (7) EXCLUDES CERTAIN SHARES                  [ ]
- --------------------------------------------------------------------------------------------------------------
 
         9       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (7)
                 9.9% of outstanding Common Shares*
- --------------------------------------------------------------------------------------------------------------
 
        10       REPORTING PERSON
                 CO
- --------------------------------------------------------------------------------------------------------------
</TABLE>
 
- ---------------
* Excludes 17,775,124 Common Shares beneficially owned by CSX Corporation which
  Norfolk Southern Corporation may be deemed to beneficially own by reason of
  the CSX/NSC Letter Agreement referred to herein.
<PAGE>   4
 
                                 SCHEDULE 14D-1
 
<TABLE>
<S> <C>                      <C> <C>                                                 <C> <C>                      <C>
- ------------------------------                                                       ------------------------------
      CUSIP NO. 208368 10 0                                                                  PAGE 3 OF 4 PAGES
- ------------------------------                                                       ------------------------------
- --------------------------------------------------------------------------------------------------------------
 
         1       NAMES OF REPORTING PERSONS
                 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                 CSX CORPORATION
- --------------------------------------------------------------------------------------------------------------
         2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                        (a) [X]
                 (b) [ ]
- --------------------------------------------------------------------------------------------------------------
         3       SEC USE ONLY
- --------------------------------------------------------------------------------------------------------------
 
         4       SOURCE OF FUNDS
                 BK, WC, 00
- --------------------------------------------------------------------------------------------------------------
         5       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
                 PURSUANT TO ITEMS 2(e) or 2(f)                                                       [ ]
- --------------------------------------------------------------------------------------------------------------
 
         6       CITIZENSHIP OR PLACE OF ORGANIZATION
                 VIRGINIA
- --------------------------------------------------------------------------------------------------------------
 
         7       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
                 REPORTING PERSON
                 17,775,124 Common Shares.* See Section 13 of the Offer to Purchase, dated December 6,
                 1996 filed and all amendments thereto
- --------------------------------------------------------------------------------------------------------------
         8       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (7) EXCLUDES CERTAIN SHARES                [X]
- --------------------------------------------------------------------------------------------------------------
 
         9       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (7)
                 Approximately 19.9% of outstanding Shares.*
- --------------------------------------------------------------------------------------------------------------
 
        10       REPORTING PERSON
                 HC and CO
- --------------------------------------------------------------------------------------------------------------
</TABLE>
 
- ---------------
* Excludes 17,775,124 Common Shares beneficially owned by Norfolk Southern
Corporation which CSX Corporation may be deemed to beneficially own by reason of
CSX/NSC Letter Agreement referred therein.
<PAGE>   5
 
                                 SCHEDULE 14D-1
 
<TABLE>
<S> <C>                      <C> <C>                                                 <C> <C>                      <C>
- ------------------------------                                                       ------------------------------
      CUSIP NO. 208368 10 0                                                                  PAGE 4 OF 4 PAGES
- ------------------------------                                                       ------------------------------
- --------------------------------------------------------------------------------------------------------------
 
         1       NAMES OF REPORTING PERSONS
                 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                 GREEN ACQUISITION CORP.
- --------------------------------------------------------------------------------------------------------------
         2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                        (a) [X]
                 (b) [ ]
- --------------------------------------------------------------------------------------------------------------
         3       SEC USE ONLY
- --------------------------------------------------------------------------------------------------------------
 
         4       SOURCE OF FUNDS
                 AF
- --------------------------------------------------------------------------------------------------------------
         5       CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
                 PURSUANT TO ITEMS 2(e) or 2(f)                                                        [
                 ]
- --------------------------------------------------------------------------------------------------------------
 
         6       CITIZENSHIP OR PLACE OF ORGANIZATION
                 PENNSYLVANIA
- --------------------------------------------------------------------------------------------------------------
 
         7       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
                 REPORTING PERSON
                 17,775,124 Common Shares.*
- --------------------------------------------------------------------------------------------------------------
         8       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (7) EXCLUDES CERTAIN SHARES                [X]
- --------------------------------------------------------------------------------------------------------------
 
         9       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (7)
                 19.9% of outstanding Shares.*
- --------------------------------------------------------------------------------------------------------------
 
        10       REPORTING PERSON
                 CO
- --------------------------------------------------------------------------------------------------------------
</TABLE>
 
- ---------------
* Excludes 18,200,100 Common Shares beneficially owned by Norfolk Southern
  Corporation which CSX Corporation may be deemed to beneficially own by reason
  of the CSX/NSC Letter Agreement referred to herein.
<PAGE>   6
 
     This Statement amends and supplements the Tender Offer Statement on
Schedule 14D-1 filed with the Securities and Exchange Commission (the "SEC") on
December 6, 1996, as previously amended and supplemented (the "Schedule 14D-1"),
by Green Acquisition Corp. ("Purchaser"), a Pennsylvania corporation, CSX
Corporation, a Virginia corporation ("Parent" or "CSX"), and Norfolk Southern
Corporation, a Virginia Corporation ("NSC") to purchase all shares of (i) Common
Stock, par value $1.00 per share (the "Common Shares"), and (ii) Series A ESOP
Convertible Junior Preferred Stock, without par value (together with the Common
Shares, the "Shares"), of Conrail Inc., a Pennsylvania corporation (the
"Company"), including, in each case, the associated common stock purchase
rights, upon the terms and subject to the conditions set forth in the Offer to
Purchase, dated December 6, 1996, the Supplement thereto, dated December 19,
1996 (the "First Supplement"), the Second Supplement thereto, dated March 7,
1997 (the "Second Supplement"), and the Third Supplement thereto, dated April
10, 1997 (the "Third Supplement"), and the related Letters of Transmittal
(which, together with any amendments or supplements thereto, constitute the
"Offer") at a purchase price of $115 per Share, net to the tendering shareholder
in cash. Capitalized terms used and not defined herein shall have the meanings
assigned such terms in the Offer to Purchase, the First Supplement, the Second
Supplement, the Third Supplement and the Schedule 14D-1.
 
ITEM 1.  SECURITY AND SUBJECT COMPANY.
 
     Item 1(b) is hereby amended and supplemented by reference to the
Introduction to the Third Supplement, which Section is incorporated herein by
reference.
 
     Item 1(c) is hereby amended and supplemented by reference to Section 2 of
the Third Supplement, which Section is incorporated herein by reference.
 
ITEM 2.  IDENTITY AND BACKGROUND.
 
     Item 2 is hereby amended and supplemented by reference to Section 4 and
Schedule A of the Third Supplement, which Section is incorporated herein by
reference.
 
ITEM 3.  PAST CONTACTS, TRANSACTIONS OR NEGOTIATIONS WITH THE SUBJECT COMPANY.
 
     Item 3(a) is hereby amended and supplemented by reference to Section 3 of
the Third Supplement, which Section is hereby incorporated by reference.
 
     Item 3(b) is hereby amended and supplemented by reference to Section 4 and
Section 6 of the Third Supplement, which Section is incorporated herein by
reference.
 
ITEM 4.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.
 
     Item 4(a) is hereby amended and supplemented by reference to Section 5 of
the Third Supplement, which Section is incorporated herein by reference.
 
     Item 4(b) is hereby amended and supplemented by reference to Section 5 of
the Third Supplement, which Section is incorporated herein by reference.
 
ITEM 5.  PURPOSE OF THE TENDER OFFER AND PLANS OR PROPOSALS OF THE BIDDER.
 
     Item 5 is hereby amended and supplemented by reference to Section 7 and
Section 8 of the Third Supplement, which Section is incorporated herein by
reference.
 
ITEM 6.  INTEREST IN SECURITIES OF THE SUBJECT COMPANY.
 
     Item 6(a) is hereby amended and supplemented by reference to the
Introduction to and Section 4 of the Third Supplement, which Section is
incorporated herein by reference.
 
     Item 6(b) is hereby amended and supplemented by reference to Section 4 of
the Third Supplement, which Section is incorporated herein by reference.
<PAGE>   7
 
ITEM 7.  CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT
         TO THE SUBJECT COMPANY'S SECURITIES.
 
     Item 7 is hereby amended and supplemented by reference to Section 8 of the
Third Supplement, which Section is incorporated herein by reference.
 
ITEM 8.  PERSONS RETAINED, EMPLOYED OR TO BE COMPENSATED.
 
     Item 8 is hereby amended and supplemented by reference to Section 11 of the
Third Supplement, which Section is incorporated herein by reference.
 
ITEM 9.  FINANCIAL STATEMENTS OF CERTAIN BIDDERS.
 
     Item 9 is hereby amended and supplemented by reference to Section 4 of the
Third Supplement, which Section is incorporated herein by reference.
 
ITEM 10.  ADDITIONAL INFORMATION.
 
     Item 10(b) is hereby amended and supplemented by reference to Section 10 of
the Third Supplement, which Section is incorporated herein by reference.
 
     Item 10(e) is hereby amended and supplemented by reference to Section 10 of
the Third Supplement, which Section is incorporated herein by reference.
 
ITEM 11.  MATERIAL TO BE FILED AS EXHIBITS.
 
<TABLE>
  <C>      <S>
   (a)(37) Text of Press Release issued by CSX and NSC on April 8, 1997.
   (a)(38) Third Supplement to Offer to Purchase, dated April 10, 1997.
   (a)(39) Revised Letter of Transmittal circulated with the Third Supplement.
   (a)(40) Revised Notice of Guaranteed Delivery circulated with the Third Supplement.
   (b) (2) Credit Agreement, dated as of February 10, 1997, by and among NSC, Morgan Guaranty
           Trust Company of New York, as administrative agent, Merrill Lynch Capital
           Corporation, as documentation agent, and the banks from time to time parties
           thereto (incorporated by reference to Exhibit (b)(2) of NSC's and Atlantic
           Acquisition Corporation's Tender Offer Statement on Schedule 14D-1, dated February
           12, 1997).
   (c)(10) Deleted.
   (c)(14) Letter Agreement between CSX and NSC, dated April 8, 1997.
   (c)(15) Fourth Amendment to Agreement and Plan of Merger, dated as of April 8, 1997, by
           and among CSX, Purchaser and the Company.
</TABLE>
<PAGE>   8
 
                                   SIGNATURE
 
     After due inquiry and to the best of its knowledge and belief, the
undersigned certifies that the information set forth in this statement is true,
complete and correct.
 
                                          CSX CORPORATION
 
                                          By: /s/ MARK G. ARON
 
                                            ------------------------------------
                                          Name: Mark G. Aron
                                          Title: Executive Vice President --
                                             Law and Public Affairs
 
Dated: April 10, 1997
<PAGE>   9
 
                                   SIGNATURE
 
     After due inquiry and to the best of its knowledge and belief, the
undersigned certifies that the information set forth in this statement is true,
complete and correct.
 
                                          NORFOLK SOUTHERN CORPORATION
 
                                          By: /s/ JAMES C. BISHOP, JR.
 
                                          --------------------------------------
                                          Name: James C. Bishop, Jr.
                                          Title: Executive Vice President-Law
 
Dated: April 10, 1997
<PAGE>   10
 
                                   SIGNATURE
 
     After due inquiry and to the best of its knowledge and belief, the
undersigned certifies that the information set forth in this statement is true,
complete and correct.
 
                                          ATLANTIC ACQUISITION CORPORATION
 
                                          By: /s/ JAMES C. BISHOP, JR.
                                          --------------------------------------
                                          Name: James C. Bishop, Jr.
                                          Title: Vice President and General
                                          Counsel
 
Dated: April 10, 1997
<PAGE>   11
 
                                   SIGNATURE
 
     After due inquiry and to the best of its knowledge and belief, the
undersigned certifies that the information set forth in this statement is true,
complete and correct.
 
                                          GREEN ACQUISITION CORP.
 
                                          By: /s/ MARK G. ARON
 
                                            ------------------------------------
                                          Name: Mark G. Aron
                                          Title: General Counsel and Secretary
 
Dated: April 10, 1997
<PAGE>   12
 
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
EXHIBIT
  NO.
- --------
<S>          <C>
*(a)(1)      Offer to Purchase, dated December 6, 1996.
*(a)(2)      Letter of Transmittal.
*(a)(3)      Notice of Guaranteed Delivery.
*(a)(4)      Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other
             Nominees.
*(a)(5)      Letter to Clients for use by Brokers, Dealers, Commercial Banks, Trust Companies
             and Other Nominees.
*(a)(6)      Guidelines for Certification of Taxpayer Identification Number on Substitute
             Form W-9.
*(a)(7)      Tender Offer Instructions for Participants of Conrail Inc. Dividend Reinvestment
             Plan.
*(a)(8)      Text of Press Release issued by Parent and the Company on December 6, 1996.
*(a)(9)      Form of Summary Advertisement, dated December 6, 1996.
*(a)(10)     Text of Press Release issued by Parent on December 5, 1996.
*(a)(11)     Text of Press Release issued by Parent and the Company on December 10, 1996.
*(a)(12)     Text of Advertisement published by Parent and the Company on December 10, 1996.
*(a)(13)     Text of Press Release issued by Parent on December 11, 1996.
*(a)(14)     Text of Advertisement published by Parent and the Company on December 12, 1996.
*(a)(15)     Supplement to Offer to Purchase, dated December 19, 1996.
*(a)(16)     Revised Letter of Transmittal.
*(a)(17)     Revised Notice of Guaranteed Delivery.
*(a)(18)     Text of Press Release issued by Parent and the Company on December 19, 1996.
*(a)(19)     Letter from Parent to shareholders of the Company, dated December 19, 1996.
*(a)(20)     Text of Press Release issued by Parent on December 20, 1996.
*(a)(21)     Text of Press Release issued by Parent and the Company on January 9, 1997.
*(a)(22)     Text of Press Release issued by Parent and the Company on January 13, 1997.
*(a)(23)     Text of Press Release issued by Parent and the Company on January 15, 1997.
*(a)(24)     Text of Press Release issued by Parent on January 17, 1997.
 (a)(25)     Deleted.
*(a)(26)     Text of Letter issued by Parent and the Company dated January 22, 1997.
*(a)(27)     Text of Advertisement published by Parent and the Company on January 29, 1997.
*(a)(28)     Text of Press Release issued by Parent and the Company on January 31, 1997.
*(a)(29)     Text of Press Release issued by Parent on February 14, 1997.
*(a)(30)     Text of Press Release issued by Parent on March 3, 1997.
*(a)(31)     Second Supplement to Offer to Purchase, dated March 7, 1997.
*(a)(32)     Revised Letter of Transmittal.
*(a)(33)     Revised Notice of Guaranteed Delivery.
*(a)(34)     Text of Press Release issued by Parent on March 7, 1997.
*(a)(35)     Form of Summary Advertisement, dated March 10, 1997.
*(a)(36)     Letter from Parent to employees of the Company, published on March 12, 1997.
 (a)(37)     Text of Press Release issued by CSX and NSC on April 8, 1997.
 (a)(38)     Third Supplement to Offer to Purchase, dated April 10, 1997.
 (a)(39)     Revised Letter of Transmittal circulated with the Third Supplement.
 (a)(40)     Revised Notice of Guaranteed Delivery circulated with the Third Supplement.
</TABLE>
<PAGE>   13
 
<TABLE>
<CAPTION>
EXHIBIT
  NO.
- --------
<S>          <C>
*(b)(1)      Credit Agreement, dated November 15, 1996 (incorporated by reference to Exhibit
             (b)(2) to Parent and Purchaser's Tender Offer Statement on Schedule 14D-1, as
             amended, dated October 16, 1996).
 (b)(2)      Credit Agreement, dated as of February 10, 1997, by and among NSC, Morgan
             Guaranty Trust Company of New York, as administrative agent, Merrill Lynch
             Capital Corporation, as documentation agent, and the banks from time to time
             parties thereto (incorporated by reference to NSC's and Atlantic Acquisition
             Corporation's Tender Offer Statement on Schedule 14D-1, dated February 12,
             1997).
*(c)(1)      Agreement and Plan of Merger, dated as of October 14, 1996, by and among Parent,
             Purchaser and the Company (incorporated by reference to Exhibit (c)(1) to Parent
             and Purchaser's Tender Offer Statement on Schedule 14D-1, as amended, dated
             October 16, 1996).
*(c)(2)      Company Stock Option Agreement, dated as of October 14, 1996, between Parent and
             the Company (incorporated by reference to Exhibit (c)(2) to Parent and
             Purchaser's Tender Offer Statement on Schedule 14D-1, as amended, dated October
             16, 1996).
*(c)(3)      Parent Stock Option Agreement, dated as of October 14, 1996, between Parent and
             the Company (incorporated by reference to Exhibit (c)(3) to Parent and
             Purchaser's Tender Offer Statement on Schedule 14D-1, as amended, dated October
             16, 1996).
*(c)(4)      Voting Trust Agreement, dated as of October 15, 1996, by and among Parent,
             Purchaser and Deposit Guaranty National Bank (incorporated by reference to
             Exhibit (c)(4) to Parent and Purchaser's Tender Offer Statement on Schedule
             14D-1, as amended, dated October 16, 1996).
*(c)(5)      First Amendment to Agreement and Plan of Merger, dated as of November 5, 1996,
             by and among Parent, Purchaser and the Company (incorporated by reference to
             Exhibit (c)(7) to Parent and Purchaser's Tender Offer Statement on Schedule
             14D-1, as amended, dated October 16, 1996).
*(c)(6)      Second Amendment to Agreement and Plan of Merger, dated as of December 18, 1996,
             by and among Parent, Purchaser and the Company.
*(c)(7)      Form of Amended and Restated Voting Trust Agreement.
 (c)(8)      Deleted.
*(c)(9)      Text of STB Decision No. 5 of STB Finance Docket No. 33220, dated January 8,
             1997.
 (c)(10)     Deleted.
*(c)(11)     Text of opinion of Judge Donald VanArtsdalen of the United States District Court
             for the Eastern District of Pennsylvania as delivered from the bench on January
             9, 1997.
*(c)(12)     Third Amendment to Agreement and Plan of Merger, dated as of March 7, 1997, by
             and among Parent, Purchaser and the Company.
*(c)(13)     Form of Amended and Restated Voting Trust Agreement.
 (c)(14)     Letter Agreement between CSX and NSC, dated April 8, 1997.
 (c)(15)     Fourth Amendment to Agreement and Plan of Merger, dated as of April 8, 1997, by
             and among CSX, Purchaser and the Company.
 (d)         Not applicable.
 (e)         Not applicable.
 (f)         Not applicable.
</TABLE>
 
- ---------------
* Previously filed.

<PAGE>   1
                                                                 Exhibit(a)(37)


CONTACTS:        THOMAS E. HOPPIN           ROBERT FORT
                 CSX CORPORATION            NORFOLK SOUTHERN CORPORATION
                 804-782-1450               757-629-2710

FOR IMMEDIATE RELEASE

               CSX, NORFOLK SOUTHERN AGREE ON DIVISION OF CONRAIL;
              JOINT ACQUISITION AND JOINT STB APPLICATION ALSO SET

RICHMOND and NORFOLK, Va. - April 8, 1997 - CSX Corporation (NYSE: CSX) and
Norfolk Southern Corporation (NYSE: NSC) today announced that they have reached
agreement on a division of the routes and assets of Conrail Inc.

         The two companies said they will form a jointly owned entity to acquire
all outstanding shares of Conrail for $115 in cash per share. Norfolk Southern
will contribute $5.9 billion for its 58 percent share of the acquisition and CSX
will contribute $4.3 billion for its 42 percent share. The totals include
amounts previously spent by Norfolk Southern and CSX to acquire Conrail shares.

         The companies also said they will file a joint application with the
Surface Transportation Board in June seeking approval of the Conrail acquisition
and division.

         CSX's pending tender offer for the remaining shares of Conrail will be
amended to include Norfolk Southern and will be extended to May 23, 1997. The
shares purchased in the offer will be placed in a joint voting trust pending STB
approval of the proposed transaction.

         As part of the agreement, CSX and Norfolk Southern will move to dismiss
all pending litigation between the two companies.

         Norfolk Southern and CSX said the plan will create balanced competition
in the East, restore rail competition in regions now served only by Conrail, and
improve service to customers.

         The result will be two strong competitors that will provide single-line
service between the New York metropolitan area and Chicago, between New York and
St. Louis and between the New York area and markets to the south and southwest.
Implementation of the plan is expected to bring new business and new jobs to the
rail industry and the regions now served by both companies.

         The companies said they are confident the plan will earn support from
customers and the public, and are hopeful the STB will consider the joint
application on an expedited schedule.

         Under the plan, Norfolk Southern and CSX will divide all of Conrail's
principal routes, which form an "X" crossing in Ohio, with each railroad
operating two of the four legs of the "X". Norfolk Southern will obtain about 58
percent of Conrail and CSX about 42 percent, based on the revenues generated by
Conrail's lines and facilities in 1995.

                                   -- MORE --
<PAGE>   2
                                       -2-

         In arriving at the proposed division, the companies focused on
producing the best fit with their existing systems and optimizing service to
customers.

         CSX will operate the legs between Boston and Cleveland through Albany
and Buffalo with connecting lines to Montreal, New York and New Jersey and
between Cleveland and St. Louis (former New York Central mainlines). In
addition, CSX will operate Conrail's line connecting New York and Philadelphia
(a former Reading line) and the line that connects Crestline, Ohio and Chicago,
a portion of which west of Fort Wayne, Ind., now is owned by Norfolk Southern.
CSX will also operate the line between Toledo and Columbus, Ohio.

         Norfolk Southern will operate legs of the "X" between Chicago and
Cleveland (a former New York Central mainline) and the Conrail line between
Cleveland and northern New Jersey via Pittsburgh and Harrisburg (mostly the
former Pennsylvania Railroad mainline). In addition, Norfolk Southern will
operate the Conrail line serving the metropolitan New York area between northern
New Jersey and Buffalo through Binghamton, N.Y., (former Erie Lackawanna) and
another between Buffalo and Harrisburg, Pa.

         Norfolk Southern will operate most Conrail lines in Michigan, Maryland,
Delaware and Pennsylvania. It also will operate the routes between Toledo and
Detroit, Columbus and Cincinnati and between Columbus and Charleston, W. Va.

         Norfolk Southern and CSX jointly will operate Conrail assets in major
terminal areas such as Detroit and northern and southern New Jersey. The two
companies also will share access to certain lines in Philadelphia and
Indianapolis, and to the rail lines serving the Monongahela coal fields in
southwestern Pennsylvania.

         The joint STB application will address traffic flows, terminal
operations and related matters; outline the capital investments each company
plans to make in new connections and facilities and to increase capacity on
critical routes; and detail operating savings and other public benefits
resulting from the transaction. Norfolk Southern and CSX will jointly solve the
few "2-to-1" points created by their division of Conrail.

         CSX Corporation, headquartered in Richmond, Va., is an international
transportation company offering a variety of rail, container-shipping,
intermodal, trucking, barge and contract logistics management services. The
company's 18,000 route-mile rail system links 20 states to the East and Midwest.

         Norfolk Southern is a Virginia-based holding company with headquarters
in Norfolk, Va. It owns a major freight railroad, Norfolk Southern Railway
Company, which operates more than 14,300 miles of road in 20 states primarily in
the Southeast and Midwest, and the Province of Ontario, Canada. The corporation
also owns North American Van Lines, Inc., and Pocahontas Land Corporation, a
natural resources company.

                                      # # #

         Note: Maps showing the proposed division of Conrail are available on
the World Wide Web sites of CSX and Norfolk Southern.

         (Norfolk Southern: http://www.nscorp.com; CSX: http://www.csx.com)

<PAGE>   1
 
        THIRD SUPPLEMENT TO THE OFFER TO PURCHASE DATED DECEMBER 6, 1996
 
                            GREEN ACQUISITION CORP.
                     CURRENTLY A WHOLLY OWNED SUBSIDIARY OF
                                CSX CORPORATION
                    IS AMENDING THE SECOND OFFER TO INCLUDE
                          NORFOLK SOUTHERN CORPORATION
                       AS A CO-BIDDER AS DESCRIBED BELOW
 
      THE SECOND OFFER HAS BEEN EXTENDED. THE SECOND OFFER AND WITHDRAWAL
      RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON FRIDAY, MAY
      23, 1997, UNLESS THE SECOND OFFER IS FURTHER EXTENDED.
 
    CSX Corporation, a Virginia corporation ("CSX"), and Norfolk Southern
Corporation, a Virginia corporation ("NSC"), have entered into a letter
agreement, dated April 8, 1997 (the "CSX/NSC Letter Agreement"), which provides,
among other things, (i) for the termination of the NSC tender offer commenced on
February 12, 1997 (the "NSC Second Offer") and the dismissal of litigation
between CSX and NSC, (ii) that Green Acquisition Corp. ("Purchaser") will,
directly or indirectly, become a jointly owned subsidiary of CSX and NSC, (iii)
that, through Purchaser, CSX and NSC will jointly acquire all Shares not already
owned by CSX and NSC through the Second Offer and the Merger, and will jointly
provide the funds necessary therefor, and (iv) that Conrail Inc. (the "Company")
will continue to be managed by its Board of Directors until the requisite
approval of the Surface Transportation Board (the "STB") is obtained and,
following receipt of such approval, CSX and NSC will be separately allocated
certain of the Company's railroad operations and will jointly operate certain
other railroad operations of the Company. See Section 8 of this Third
Supplement.
 
    Except as otherwise set forth in this Third Supplement, the terms and
conditions previously set forth in the Offer to Purchase, dated December 6,
1996, the Supplement thereto, dated December 19, 1996, and the Second Supplement
thereto, dated March 7, 1997, remain applicable in all respects to the Second
Offer, and this Third Supplement should be read in conjunction with the Offer to
Purchase, the First Supplement and the Second Supplement. Unless the context
requires otherwise, terms not defined herein have the meanings ascribed to them
in the Offer to Purchase, the First Supplement and the Second Supplement.
                            ------------------------
 
    THE BOARD OF DIRECTORS OF THE COMPANY HAS APPROVED THE SECOND OFFER AND THE
MERGER, DETERMINED THAT THE MERGER AGREEMENT AND THE TRANSACTIONS CONTEMPLATED
THEREBY ARE IN THE BEST INTERESTS OF THE COMPANY AND RECOMMENDS THAT
SHAREHOLDERS OF THE COMPANY ACCEPT THE SECOND OFFER AND TENDER THEIR SHARES
PURSUANT TO THE SECOND OFFER.
 
                                   IMPORTANT
 
    Any shareholder desiring to tender all or any portion of such shareholder's
shares of common stock, par value $1.00 per share ("Common Shares"), or shares
of Series A ESOP Convertible Junior Preferred Stock, without par value ("ESOP
Preferred Shares" and, together with the Common Shares, the "Shares"), of the
Company should either (i) complete and sign one of the (blue) Letters of
Transmittal (or a facsimile thereof) circulated with the Offer to Purchase, the
First Supplement or the Second Supplement or the (green) Letter of Transmittal
circulated with this Third Supplement in accordance with the instructions in
such Letter of Transmittal, have such shareholder's signature thereon guaranteed
if required by Instruction 1 to such Letter of Transmittal, mail or deliver such
Letter of Transmittal (or such facsimile thereof) and any other required
documents to the Depositary and either deliver the certificates for such Shares
to the Depositary along with such Letter of Transmittal (or a facsimile thereof)
or deliver such Shares pursuant to the procedures for book-entry transfer set
forth in Section 3 of the Offer to Purchase prior to the expiration of the
Second Offer or (ii) request such shareholder's broker, dealer, commercial bank,
trust company or other nominee to effect the transaction for such shareholder. A
shareholder having Shares registered in the name of a broker, dealer, commercial
bank, trust company or other nominee must contact such broker, dealer,
commercial bank, trust company or other nominee if such shareholder desires to
tender such Shares. Any shareholder tendering Shares with a (blue) Letter of
Transmittal (or a facsimile thereof) circulated with the Offer to Purchase, the
First Supplement or the Second Supplement will be deemed to have tendered on the
terms set forth in the (green) Letter of Transmittal circulated with this Third
Supplement.
 
    Any shareholder who desires to tender Shares and whose certificates for such
Shares are not immediately available, or who cannot comply with the procedures
for book-entry transfer described in the Offer to Purchase on a timely basis,
may tender such Shares by following the procedures for guaranteed delivery set
forth in Section 3 of the Offer to Purchase.
 
    Questions and requests for assistance or for additional copies of this Third
Supplement, the Second Supplement, the First Supplement, the Offer to Purchase,
the Letter of Transmittal or other tender offer materials may be directed to the
Information Agent or the Dealer Managers at their respective addresses and
telephone numbers set forth on the back cover of this Third Supplement.
 
                 The Dealer Managers for the Second Offer are:
WASSERSTEIN PERELLA & CO., INC.
                                  J.P. MORGAN & CO.
                                                    MERRILL LYNCH & CO.
April 10, 1997
<PAGE>   2
 
TO THE HOLDERS OF COMMON STOCK AND SERIES A ESOP CONVERTIBLE
JUNIOR PREFERRED STOCK OF CONRAIL INC.:
 
                                  INTRODUCTION
 
     The following information amends and supplements (i) the Offer to Purchase,
dated December 6, 1996 (the "Offer to Purchase"), of Purchaser, (ii) the
Supplement to the Offer to Purchase (the "First Supplement"), dated December 19,
1996, of Purchaser, and (iii) the Second Supplement to the Offer to Purchase
(the "Second Supplement"), dated March 7, 1997, of Purchaser. Pursuant to an
amendment to the Schedule 14D-1, NSC has been added as a co-bidder as described
in Section 8 of this Third Supplement; and, pursuant to the CSX/NSC Letter
Agreement, the NSC Second Offer has been terminated. Pursuant to the Second
Offer, Purchaser is offering to purchase all Shares of the Company, at a price
of $115 per Share, net to the seller in cash, upon the terms and subject to the
conditions set forth in the Offer to Purchase, as amended and supplemented by
the First Supplement, the Second Supplement, this Third Supplement, and in the
(green) Letter of Transmittal circulated with this Third Supplement (which
together constitute the "Second Offer"). Any shareholder tendering shares with a
(blue) Letter of Transmittal (or a facsimile thereof) circulated with the Offer
to Purchase, the First Supplement or the Second Supplement will be deemed to
have tendered on the terms set forth in the (green) Letter of Transmittal
circulated with this Third Supplement.
 
     This Third Supplement should be read in conjunction with the Offer to
Purchase, the First Supplement, and the Second Supplement. Except as otherwise
set forth in this Third Supplement and the revised Letters of Transmittal, the
terms and conditions previously set forth in the Offer to Purchase, the First
Supplement, the Second Supplement and the Letters of Transmittal mailed with the
Offer to Purchase, the First Supplement, and the Second Supplement remain
applicable in all respects to the Second Offer. Unless the context requires
otherwise, terms not defined herein have the meanings ascribed to them in the
Offer to Purchase, the First Supplement or the Second Supplement. All
information contained herein relating to NSC and its subsidiaries has been
solely provided by NSC; and all information contained herein relating to CSX and
its subsidiaries (including Purchaser) has been solely provided by CSX.
 
     On April 8, 1997, the Company, Purchaser and CSX entered into the Fourth
Amendment (the "Fourth Amendment") to the Merger Agreement (as amended through
the Fourth Amendment, the "Merger Agreement") in order to, among other things,
facilitate entering into the CSX/NSC Letter Agreement and consummating the
transactions contemplated thereby. See Section 8 of this Third Supplement.
 
     CSX and NSC have entered into the CSX/NSC Letter Agreement, which provides,
among other things, (i) for the termination of the NSC Second Offer and the
dismissal of litigation between CSX and NSC (ii) that Purchaser will, directly
or indirectly, become a jointly owned subsidiary of CSX and NSC, (iii) that,
through Purchaser, CSX and NSC will jointly acquire all Shares not already owned
by CSX and NSC through the Second Offer and the Merger, and will jointly provide
the funds necessary therefor, and (iv) that the Company will continue to be
managed by its Board of Directors until the requisite approval of the STB is
obtained and, following the Control Date, CSX and NSC will be separately
allocated certain of the Company's railroad operations and will jointly operate
certain other railroad operations of the Company. See Section 8 of this Third
Supplement. In accordance with the CSX/NSC Letter Agreement, on April 9, 1997,
NSC terminated the NSC Second Offer.
 
     The conditions to the Second Offer have not been changed. The Second Offer
is conditioned upon, among other things, the Minimum Condition which requires
that prior to the expiration of the Second Offer there shall have been validly
tendered and not withdrawn such number of Shares which, together with the Common
Shares already beneficially owned by CSX and by NSC, constitutes at least a
majority of outstanding Shares on a fully diluted basis (as defined herein). The
Company has informed CSX that as of March 31, 1997 there were outstanding
90,840,890 Shares and options or other rights to purchase Shares. CSX
beneficially owns 17,775,124 Shares (excluding 15,955,477 Common Shares issuable
upon exercise of the Company Stock Option, which is currently exercisable by
CSX), all of which Shares were acquired by Purchaser in the First Offer. NSC
beneficially owns 8,200,100 Shares, all except 100 Shares of which were acquired
by NSC pursuant to its tender offer consummated on February 4, 1997 (the "NSC
First Offer"),
<PAGE>   3
 
and which will be included in the computation toward satisfaction of the Minimum
Condition. For purposes of the Second Offer, "fully diluted basis" assumes the
issuance of all Shares upon the exercise of all outstanding stock options (other
than pursuant to the Company Stock Option) or in satisfaction of any performance
shares or phantom stock awards, whether or not such stock options are presently
exercisable or such performance shares or phantom stock awards are presently
vested. Based on the foregoing and assuming no additional Shares (or options,
warrants or rights exercisable for, or securities convertible into, Shares) have
been or will be issued after March 31, 1997, if Purchaser were to purchase
32,432,834 Shares, the Minimum Condition would be satisfied. The Merger
Agreement provides that, without the consent of the Company, Purchaser will not
waive the Minimum Condition.
 
     The Second Offer is being made pursuant to the Merger Agreement which
provides that, following the completion (or expiration) of the Second Offer and
the satisfaction or waiver of certain conditions, Green Merger Corp., a
Pennsylvania corporation and a wholly owned subsidiary of Purchaser ("Merger
Sub"), will be merged with and into the Company (the "Merger"), with the Company
as the surviving corporation (the "Surviving Corporation"), in accordance with
the Pennsylvania Law. As more fully described in Section 7 of the Second
Supplement and Section 8 of this Third Supplement, in the Merger, each
outstanding Share (other than Shares held in the treasury of the Company or
owned by CSX, Purchaser, NSC or any of their respective subsidiaries or
affiliates) will be converted into the right to receive $115 in cash, without
interest. The time at which the Merger is consummated in accordance with the
Merger Agreement is hereinafter referred to as the "Effective Time."
 
     The Merger may be approved by the affirmative vote of holders of a majority
of the outstanding Shares. Therefore, if the Minimum Condition is satisfied and
the Second Offer is consummated, CSX, Purchaser and NSC will beneficially own
(through voting trusts) a sufficient number of Shares to ensure that the Merger
is approved. In addition, the "short-form" merger provisions of the Pennsylvania
Law provide that if, following consummation of the Second Offer, CSX, Purchaser
and NSC beneficially own (through voting trusts) 80% or more of the Shares, they
will be able to ensure that the Merger is consummated without the vote of the
Company's other shareholders.
 
     THE SECOND OFFER DOES NOT CONSTITUTE A SOLICITATION OF PROXIES FOR ANY
MEETING OF COMPANY SHAREHOLDERS. ANY SUCH SOLICITATION WHICH CSX, NSC OR
PURCHASER MIGHT MAKE WOULD BE MADE ONLY PURSUANT TO SEPARATE PROXY MATERIALS IN
COMPLIANCE WITH THE REQUIREMENTS OF SECTION 14(A) OF THE SECURITIES EXCHANGE ACT
OF 1934, AS AMENDED (THE "EXCHANGE ACT").
 
     Under the Pennsylvania Control Transaction Law, by virtue of entering into
the CSX/NSC Letter Agreement, any holder of Shares may make written demand on
either CSX, NSC or Purchaser for payment of cash in an amount equal to the "fair
value" (as defined in the Pennsylvania Control Transaction Law) of each such
Share as of the date of the CSX/NSC Letter Agreement. In order to make such
written demand, certain procedures specified in the Pennsylvania Control
Transaction Law must be strictly complied with by the demanding shareholder.
SECTION 10 OF THIS THIRD SUPPLEMENT CONTAINS THE NOTICE REQUIRED UNDER THE
PENNSYLVANIA CONTROL TRANSACTION LAW AND ALSO SETS FORTH THE PROCEDURES THAT
MUST BE FOLLOWED BY A SHAREHOLDER WHO WISHES TO EXERCISE SUCH SHAREHOLDER'S
RIGHTS THEREUNDER. SEE ALSO APPENDIX A TO THIS THIRD SUPPLEMENT WHICH SETS FORTH
IN FULL THE TEXT OF THE PENNSYLVANIA CONTROL TRANSACTION LAW. CSX, NSC and
Purchaser believe and intend to take the position with respect to any such
demands that the "fair value" of each Share is $115 in cash, the price being
offered in the Second Offer. In addition, under the federal securities laws,
none of CSX, NSC or Purchaser may, directly or indirectly, purchase or make any
arrangement to purchase any Shares otherwise than pursuant to the Second Offer
(which would include under the Pennsylvania Control Transaction Law), until
after consummation (or termination) of the Second Offer. Accordingly, any holder
of Shares who does not tender Shares pursuant to the Second Offer and who elects
instead to comply with the procedures set forth in the Pennsylvania Control
Transaction Law (see Section 10 of this Third Supplement) by making a demand
that such holder be paid the "fair value" of his Shares, will not receive
payment for his Shares until a date subsequent to the date that Shares are
acquired in the Second Offer. CSX, NSC and Purchaser believe that it is unlikely
that a demanding shareholder will receive more than $115 per Share.
 
                                        2
<PAGE>   4
 
     Procedures for tendering Shares are set forth in Section 3 of the Offer to
Purchase. Tendering shareholders may use the original (blue) Letter of
Transmittal and the original (gray) Notice of Guaranteed Delivery previously
circulated with the Offer to Purchase or the revised (blue) Letters of
Transmittal and revised (gray) Notices of Guaranteed Delivery circulated with
the First Supplement and the Second Supplement and the revised (green) Letter of
Transmittal and the revised (pink) Notice of Guaranteed Delivery circulated with
this Third Supplement. While the original Letter of Transmittal circulated with
the Offer to Purchase refers to the Offer to Purchase, the revised Letter of
Transmittal circulated with the First Supplement refers to the Offer to Purchase
and the First Supplement, the revised Letter of Transmittal circulated with the
Second Supplement refers to the Offer to Purchase, the First Supplement and the
Second Supplement and the Letter of Transmittal circulated with this Third
Supplement refers to the Offer to Purchase, the First Supplement, the Second
Supplement and this Third Supplement, shareholders using any such document to
tender Shares will nevertheless receive $115 per Share for each Share validly
tendered and not withdrawn and accepted for payment pursuant to the Second
Offer, subject to the conditions of the Second Offer (including that Purchaser
shall be entitled to receive any dividends, including regular quarterly cash
dividends, declared or paid on or after April 8, 1997, on the Shares with a
record date on or prior to May 30, 1997 or make a reduction in the purchase
price for Shares purchased in the Second Offer in lieu of such receipt), and no
proration will apply. In the Fourth Amendment, the Company has agreed that it
will not declare or pay any dividend (including regular quarterly cash
dividends) on the Company's capital stock with a record date on or prior to May
30, 1997. Accordingly, if Purchaser purchases Shares pursuant to the Second
Offer on the currently scheduled expiration date of May 23, 1997, shareholders
whose Shares are purchased in the Second Offer will not be entitled to receive
any further dividends on their Shares. Shareholders who have previously validly
tendered and not withdrawn Shares pursuant to the Second Offer are not required
to take any further action in order to receive, subject to the conditions of the
Second Offer (including as set forth above), the tender price of $115 per Share,
if the Shares are accepted for payment and paid for by Purchaser pursuant to the
Second Offer, except as may be required by the guaranteed delivery procedures if
such procedures were utilized. See Section 3 of the Offer to Purchase and
Sections 1 and 9 of this Third Supplement.
 
     THE OFFER TO PURCHASE, THE FIRST SUPPLEMENT, THE SECOND SUPPLEMENT, THIS
THIRD SUPPLEMENT AND THE LETTERS OF TRANSMITTAL CONTAIN IMPORTANT INFORMATION
WHICH SHOULD BE READ BEFORE ANY DECISION IS MADE WITH RESPECT TO THE SECOND
OFFER.
 
     1.  Amended Terms of the Second Offer; Expiration Date.  The discussion set
forth in Section 1 of the Offer to Purchase, Section 1 of the First Supplement,
Section 1 of the Second Supplement and the amendments thereto are hereby amended
and supplemented as follows:
 
     The term "Expiration Date" means 5:00 P.M., New York City time, on Friday,
May 23, 1997 unless and until Purchaser, in its sole discretion (but subject to
the terms of the Merger Agreement), shall have extended the period of time
during which the Second Offer is open, in which event the term "Expiration Date"
shall refer to the latest time and date at which the Second Offer, as so
extended by Purchaser, shall expire.
 
     This Third Supplement, the revised (green) Letter of Transmittal and other
relevant materials will be mailed to record holders of Shares whose names appear
on the Company's shareholder list and will be furnished, for subsequent
transmittal to beneficial owners of Shares, to brokers, dealers, commercial
banks, trust companies and similar persons whose names, or the names of whose
nominees, appear on the shareholder list or, if applicable, who are listed as
participants in a clearing agency's security position listing.
 
     2.  Price Range of Shares; Dividends.  The discussion set forth in Section
6 of the Offer to Purchase, Section 3 of the First Supplement, Section 3 of the
Second Supplement and the amendments thereto are hereby amended and supplemented
as follows:
 
     The high and low sales prices per Common Share on the NYSE composite tape
for the first quarter of 1997 were $113 1/4 and $98 1/2, respectively. The high
and low sales prices per Common Share on the NYSE composite tape for the second
quarter of 1997 (through April 9, 1997) were $113 3/4 and $112 3/4,
respectively. On April 9, 1997, the last full trading day prior to the date of
this Third Supplement, the reported closing sale
 
                                        3
<PAGE>   5
 
price per Common Share on the NYSE composite tape was $113 5/8. SHAREHOLDERS ARE
URGED TO OBTAIN A CURRENT MARKET QUOTATION FOR THE COMMON SHARES.
 
     According to published financial sources, the Company paid its regular
quarterly cash dividend of $.475 per Common Share on March 17, 1997.
 
     3.  Certain Information Concerning the Company.  The discussion set forth
in Section 8 of the Offer to Purchase and the amendments thereto are hereby
amended and supplemented as follows:
 
     Certain Operating Relationships Between the Company and NSC.  Various
subsidiaries of each of NSC, on the one hand, and the Company, on the other
hand, have operating relationships with each other. The principal interchange
points between railroads of NSC and the Company are located at Hagerstown,
Maryland, Buffalo, New York, and Cincinnati and Toledo, Ohio. In 1993, 1994 and
1995, the percentage of total loads handled by NSC which were interchanged to or
from the Company was 6.6%, 6.2% and 6.3%, respectively. In connection with
interchanges, either or both railroads of NSC and the Company may be the party
billing the shipper of such interchange freight, and in cases where one of the
parties bills for the entire shipment, such party periodically will remit to the
other party the net amount of the proceeds due to such other carrier in
accordance with standard industry practice. In addition, NSC and the Company,
together with other railroads, cooperate in terminal switching operations at
certain major locations and also have proprietary interests in various terminal
companies in their service territories.
 
     In addition to the foregoing, the railroads of NSC and the Company are
parties to various trackage rights and haulage agreements. Haulage generally
involves movement by the owning railroad, with its crews, of traffic in the
account of the using railroad to and from points on the owning railroad. Under
trackage rights agreements the using railroad operates its own trains with its
employees carrying traffic in its account over the lines of the owning railroad.
Among the various cooperative arrangements between NSC and the Company are: (i)
NSC trackage rights on the Company's line between Cincinnati and Columbus, Ohio,
(ii) haulage by NSC of the Company's automotive traffic from Bloomington,
Illinois, to Lafayette, Indiana, and haulage by NSC of certain other Company
traffic between Peoria, Illinois and Lafayette, Indiana, and (iii) NSC trackage
rights on the Company's line at Cincinnati, Ohio. In addition to the foregoing,
NSC and the Company (together with Union Pacific Railroad) operate a fleet of
intermodal containers that are free to move over the lines of each participant.
 
     Between 1993 and 1995, NSC purchased from the Company, for approximately
$11 million, approximately 120 miles of the Company's Fort Wayne line extending
from Tolleston to Fort Wayne, Indiana. At various times during this period, NSC
operated over some or all of that line under trackage rights agreements.
Currently, the Company continues to serve several customers in the Fort Wayne
area using trackage rights over former Company lines now owned by NSC.
 
     Triple Crown Services Company.  On April 1, 1993, NSC and the Company
formed Triple Crown Services Company ("TCS"), a Delaware partnership, to provide
intermodal services previously operated by a wholly owned subsidiary of NSC. The
Company paid NSC $15.0 million for a one-half interest in TCS. Since 1993 both
NSC and the Company have made additional capital contributions to TCS and
guaranteed financing of TCS equipment purchases. TCS provides intermodal
services throughout the eastern United States. Intermodal services involve the
movement of traffic both over the highway and on rail lines. Major TCS
initiatives, policies, budgets, and other matters are subject to approval by a
Management Committee consisting of equal numbers of NSC and Company senior
officers. The TCS Management Committee establishes overall strategy for TCS.
Relationships among TCS, NSC and the Company are governed by bilateral and
trilateral written agreements. TCS's revenues for 1993 (after April 1, 1993)
were $101.7 million; for 1994 and 1995, they were $148.2 million and $143.0
million, respectively.
 
     Doublestack Clearances.  In connection with the creation of the TCS
partnership, NSC and the Company agreed to cooperate to eliminate clearance
impediments for doublestack traffic between New Jersey on the Company's lines,
and Atlanta, Georgia, on lines of NSC's railroads. Doublestacking of intermodal
containers permits one container to be placed on top of another container for
movement in specialized railcars. However, because the height of doublestacked
containers often is greater than that of a standard railcar, certain structures
over rail lines, such as tunnels, overpasses and bridges, must be modified to
permit
 
                                        4
<PAGE>   6
 
doublestack service to be operated. NSC's cost for clearance work between its
connections with the Company at Hagerstown, Maryland and Atlanta, Georgia, was
approximately $4.0 million.
 
     4.  Certain Information Concerning Purchaser, CSX and NSC.  The discussion
set forth in Section 9 of the Offer to Purchase and the amendments thereto are
hereby amended and supplemented as follows:
 
     CSX.  Set forth below is certain selected historical consolidated financial
information relating to CSX and its subsidiaries which has been excerpted or
derived from audited financial statements presented in CSX's 1996 Annual Report
on Form 10-K for the fiscal year ended December 27, 1996.
 
                                CSX CORPORATION
 
                  SELECTED CONSOLIDATED FINANCIAL INFORMATION
                    (IN MILLIONS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                   FISCAL YEAR ENDED
                                                            -------------------------------
                                                             DEC.        DEC.        DEC.
                                                              27,         29,         30,
                                                             1996        1995        1994
                                                            -------     -------     -------
    <S>                                                     <C>         <C>         <C>
    INCOME STATEMENT DATA:
    Operating revenue.....................................  $10,536     $10,304     $ 9,409
    Operating expense.....................................    9,014       9,178       8,227
    Operating income......................................    1,522       1,126       1,182
    Net earnings..........................................      855         618         652
    PER SHARE INFORMATION:
    Earnings per share(1).................................  $  4.00     $  2.94     $  3.12
</TABLE>
 
<TABLE>
<CAPTION>
                                                                          AT
                                                            -------------------------------
                                                             DEC.        DEC.        DEC.
                                                              27,         29,         30,
                                                             1996        1995        1994
                                                            -------     -------     -------
    <S>                                                     <C>         <C>         <C>
    BALANCE SHEET DATA:
    Current assets........................................  $ 2,072     $ 1,935     $ 1,665
    Properties -- net.....................................   11,906      11,297      11,044
    Total assets..........................................   16,965      14,282      13,724
    Long-term debt, current portion.......................      101         486         312
    Total current liabilities.............................    2,757       2,991       2,505
    Long-term debt, excluding current portion.............    4,331       2,222       2,618
    Total shareholders' equity............................    4,995       4,242       3,731
</TABLE>
 
- ---------------
 
(1) All per share data has been adjusted a for two-for-one stock split
    distributed on December 21, 1995.
 
     NSC. NSC is a Virginia corporation with its principal executive offices
located at Three Commercial Place, Norfolk, Virginia 23510. NSC is a holding
company that owns all the common stock of and controls a major freight railroad,
Norfolk Southern Railway Company; a motor carrier, North American Van Lines,
Inc. ("North American"); and a natural resources company, Pocahontas Land
Corporation ("Pocahontas Land"). The railroad system's lines extend over more
than 14,300 miles of road in 20 states, primarily in the Southeast and Midwest,
and the Province of Ontario, Canada. North American provides household moving
and specialized freight handling services in the United States and Canada, and
offers certain motor carrier services worldwide. Pocahontas Land manages
approximately 900,000 acres of coal, natural gas and timber resources in
Alabama, Illinois, Kentucky, Tennessee, Virginia and West Virginia.
 
     NSC is subject to the information and reporting requirements of the
Exchange Act and is required to file reports and other information with the SEC
relating to its business, financial condition and other matters. Information, as
of particular dates, concerning NSC's directors and officers, their
remuneration, stock options granted to them, the principal holders of NSC's
securities, any material interests of such persons in
 
                                        5
<PAGE>   7
 
transactions with NSC and other matters is required to be disclosed in proxy
statements distributed to NSC's shareholders and filed with the SEC. These
reports, proxy statements and other information should be available for
inspection and copies may be obtained in the same manner as set forth for the
Company in Section 8 of the Offer to Purchase. NSC's common stock is listed on
the NYSE, and reports, proxy statements and other information concerning NSC
should also be available for inspection at the offices of the NYSE, 20 Broad
Street, New York, New York 10005.
 
     Set forth below is certain selected historical consolidated financial
information relating to NSC and its subsidiaries which has been excerpted or
derived from audited financial statements presented in NSC's 1996 Annual Report
to Stockholders. More comprehensive financial information is included in such
reports and other documents filed by NSC with the SEC. The financial information
summary set forth below is qualified in its entirety by reference to such
reports and other documents which have been filed with the SEC, including the
financial information and related notes contained therein, which are
incorporated herein by reference. Such reports and other documents may be
inspected at and copies may be obtained from the offices of the SEC or the NYSE
in the manner set forth above.
 
                          NORFOLK SOUTHERN CORPORATION
 
                      SELECTED CONSOLIDATED FINANCIAL DATA
 
                    (IN MILLIONS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                     YEAR ENDED DECEMBER 31,
                                                                ---------------------------------
                                                                  1996        1995        1994
                                                                ---------   ---------   ---------
<S>                                                             <C>         <C>         <C>
INCOME STATEMENT DATA:
Operating revenues............................................  $ 4,770.0   $ 4,668.0   $ 4,581.3
Operating expenses............................................    3,573.0     3,581.7     3,515.9
Operating income..............................................    1,197.0     1,086.3     1,065.4
Net income to common shareholders.............................      770.4       712.7       667.8
PER SHARE INFORMATION:
Net earnings per common share.................................       6.09        5.44        4.90
BALANCE SHEET DATA:
Current assets................................................  $ 1,456.8   $ 1,342.8   $ 1,337.5
Property, less accumulated depreciation.......................    9,529.1     9,258.8     8,897.1
Total assets..................................................   11,416.4    10,904.8    10,587.8
Current liabilities...........................................    1,190.3     1,205.8     1,131.8
Long-term debt, excluding current portion.....................    1,800.3     1,553.3     1.547.8
Total shareholders' equity....................................    4,977.6     4,829.0     4,684.8
</TABLE>
 
     The name, citizenship, business address, principal occupation or employment
and five-year employment history for each of the directors and executive
officers of NSC are set forth in Schedule A hereto.
 
     On October 18, 1996, Atlantic Investment Company, a wholly owned subsidiary
of NSC ("Atlantic"), purchased in a market transaction 100 Common Shares at a
price of $86 per Share. On October 23, 1996, Atlantic transferred beneficial
ownership of such shares to Atlantic Acquisition Corporation, a Pennsylvania
corporation and a wholly owned subsidiary of NSC ("AAC"), which AAC subsequently
transferred back to Atlantic on February 4, 1997. On February 4, 1997, AAC
accepted for payment 8,200,000 Common Shares pursuant to the NSC First Offer at
a price of $115 per Share. In addition, L.I. Prillaman, the Executive Vice
President-Marketing of NSC, owns 20 Common Shares, and Kathryn B. McQuade, Vice
President-Internal Audit of NSC, owns 50 Common Shares. Further, the spouse of
E.B. Leisenring, Jr., a director of NSC, is (i) the sole beneficiary of three
trusts, the trustee of which is Mellon Bank, that hold 5,869 Common Shares and
(ii) a one-fourth beneficiary of a trust (the "CSB Trust"), the trustee of which
is CoreStates Bank, that holds 1,500 Common Shares. On October 18, 1996, the CSB
Trust sold 500 Common Shares at $85.625 per Share. Except as set forth in this
Third Supplement, none of NSC or, to the best knowledge of NSC or AAC, any of
the persons listed in Schedule A hereto, or any associate or majority-owned
subsidiary of such persons, beneficially owns any equity security of the
Company, and none of NSC, AAC or, to the best knowledge of
 
                                        6
<PAGE>   8
 
NSC or ACC, any of the other persons referred to above, or any of the respective
directors, executive officers or subsidiaries of any of the foregoing, has
effected any transaction in any equity security of the Company during the past
60 days.
 
     Except as set forth in this Third Supplement, none of NSC, AAC or, to the
best knowledge of NSC or AAC, any of the persons listed in Schedule A hereto has
any contract, arrangement, understanding or relationship with any other person
with respect to any securities of the Company, including, without limitation,
any contract, arrangement, understanding or relationship concerning the transfer
or the voting of any securities of the Company, joint ventures, loan or option
arrangements, puts or calls, guaranties of loans, guaranties against loss or the
giving or withholding of proxies. Except as set forth in this Third Supplement,
none of NSC, AAC or, to the best knowledge of NSC or AAC, any of the persons
listed in Schedule A hereto has had any transactions with the Company or any of
its executive officers, directors or affiliates that would require reporting
under the rules of the SEC.
 
     For a number of years, certain members of senior management of NSC,
including David R. Goode, Chairman, President and Chief Executive Officer of
NSC, have spoken numerous times with senior management of the Company, including
the Company's Chairman and Chief Executive Officer, David M. LeVan, concerning a
possible business combination between NSC and the Company.
 
     Except as set forth in the Offer to Purchase, the First Supplement, the
Second Supplement or this Third Supplement, there have been no contacts,
negotiations or transactions between NSC, its subsidiaries or, to the best
knowledge of NSC, any of the persons listed in Schedule A hereto, on the one
hand, and the Company or its executive officers, directors or affiliates, on the
other hand, concerning a merger, consolidation or acquisition, tender offer or
other acquisition of securities, election of directors, or a sale or other
transfer of a material amount of assets.
 
     5.  Source and Amount of Funds.  The discussion set forth in Section 10 of
the Offer to Purchase, Section 4 of the Second Supplement and the amendments
thereto are hereby amended and supplemented as follows:
 
     Purchaser estimates that the total amount of funds required to purchase all
outstanding Shares pursuant to the Second Offer will be approximately $7.6
billion (including related fees and expenses). See "Fees and Expenses" in
Section 17 of the Offer to Purchase. The necessary funds are expected to be
provided by CSX and NSC, as provided in the CSX/ NSC Letter Agreement. It is
expected that, if all outstanding Shares are purchased pursuant to the Second
Offer, NSC will contribute or otherwise pay approximately $5.1 billion
(including related fees and expenses) and CSX will contribute or otherwise pay
approximately $2.5 billion (including related fees and expenses).
 
     CSX plans to obtain the funds for contributions from its available cash and
working capital, through the issuance of long- or short-term debt and other
similar securities (including, without limitation, commercial paper notes)
through borrowings under the Facility or through a combination of these sources.
 
     NSC plans to obtain the necessary funds from its available cash and working
capital, and either through the issuance of long-term or short-term debt
securities (including, without limitation, commercial paper notes), preferred
stock, depositary shares or common stock or under a new bank credit facility
(that would replace the NSC Credit Agreement (as defined and described below)),
or through a combination of the above sources. NSC has filed with the SEC a
Registration Statement on Form S-3 under the Securities Act of 1933, as amended,
to register the sale of up to $4.3 billion of debt securities, preferred stock,
depositary shares and common stock which may be issued, in whole or in part, to
finance NSC's portion of the purchase price for Shares pursuant to the Second
Offer and the Merger.
 
     NSC's commercial paper program involves the private placement of unsecured,
commercial paper notes with varying maturities of up to 270 days. The commercial
paper issuances generally have an effective interest rate approximating the then
market rate of interest for commercial paper of similar rating. Currently the
weighted average interest rate for commercial paper outstanding is approximately
5.4%. NSC may refinance any commercial paper borrowings used to finance the
purchase of Shares pursuant to the Second Offer and the
 
                                        7
<PAGE>   9
 
Merger through private placements of additional commercial paper, borrowings
under the NSC Credit Facility (as defined below) or under any successor facility
or, depending on market or business conditions and subject to certain
restrictions on the incurrence of indebtedness set forth in the NSC Credit
Agreement (as defined below) or in any successor agreement, through such other
financing as NSC may deem appropriate.
 
     To finance payment of the NSC First Offer, NSC issued and sold $1.0 billion
in commercial paper, supported by the NSC Credit Agreement.
 
     As of February 10, 1997, NSC entered into a Credit Agreement (the "NSC
Credit Agreement") with Morgan Guaranty Trust Company of New York, as
administrative agent (the "Administrative Agent"), Merrill Lynch Capital
Corporation, as documentation agent (in such capacity and together with the
Administrative Agent, the "Arrangers"), and certain financial institutions (the
"Lenders"), under which the Lenders agreed to provide NSC with a senior credit
facility (the "NSC Credit Facility") providing an aggregate principal amount not
to exceed $13 billion in loans to finance NSC's acquisition of Shares, to pay
related fees and expenses, to refinance NSC's and NSC's share of the Company's
existing debt and for working capital purposes. On April 9, 1997, NSC terminated
the term loan commitments previously available to it under the NSC Credit
Agreement, but retained the revolving credit facility.
 
     As currently constituted, the NSC Credit Facility consists of a revolving
credit facility, under which NSC has not borrowed, providing up to $1.65 billion
of revolving loans, which will bear interest at a rate per annum equal to, at
the option of NSC, any of (i) the Eurodollar rate plus a margin of 0.1%, (ii) an
adjusted CD rate plus a margin of 0.225% or (iii) the higher of Morgan's prime
rate or the federal funds rate plus .50% (the "Base Rate") or a money market
rate, and will mature on August 1, 1998. The NSC Credit Facility also provides
for a facility fee accruing on the total amount available or outstanding
thereunder at a rate which will initially be .25% per annum and may be adjusted
depending upon NSC's senior unsecured long-term debt ratings to between .125%
and .375% per annum. In addition, during all times that both NSC's senior
unsecured long-term debt and the loans under the NSC Credit Facility have
ratings below investment grade, such loans will bear interest at a rate per
annum equal to the rates described above that would otherwise be applicable to
such loans plus an additional margin of .125%.
 
     The NSC Credit Agreement contains certain financial covenants as well as
certain restrictions on, among other things, (i) maturities or amortization of
indebtedness prior to six months after the final maturity of the loans under the
NSC Credit Facility, (ii) indebtedness of subsidiaries, (iii) liens, (iv)
mergers, consolidations, liquidations, dissolutions and sales of assets, (v)
transactions with affiliates, and (vi) the ability of subsidiaries to pay
dividends. The financial covenants require NSC to maintain specified (i) minimum
interest coverage ratios, (ii) minimum consolidated net worth, and (iii) maximum
leverage ratios. The covenants also restrict payments, transfers or other
distributions from NSC to the Company prior to the later of the consummation of
the Merger or the date on which the approval of the STB shall have been
obtained.
 
     In connection with the NSC Credit Agreement, NSC has agreed to pay the
Arrangers and the Lenders certain fees, to reimburse the Arrangers and the
Lenders for certain expenses and to provide certain indemnities, as is customary
for commitments of the type described herein.
 
     It is anticipated that any indebtedness incurred by NSC under the NSC
Credit Facility will be repaid from funds generated internally by NSC and its
subsidiaries (including, after the Merger, if consummated, funds generated
through operation of certain routes and assets of the Company and its
subsidiaries), through additional borrowings, or through a combination of such
sources. No final decisions have been made concerning the method NSC will employ
to repay such indebtedness. Such decisions when made will be based on NSC's
review from time to time of the advisability of particular actions, as well as
on prevailing interest rates and financial and other economic conditions. Prior
to consummation of the Second Offer, NSC intends to enter into a new credit
agreement, and if successful in doing so, expects to terminate the revolving
credit facility under the NSC Credit Agreement.
 
     The foregoing description of the NSC Credit Agreement is qualified in its
entirety by reference to the full text of the NSC Credit Agreement, a copy of
which has been filed with the SEC as an exhibit to the Schedule 14D-1.
 
                                        8
<PAGE>   10
 
     6.  Background of the Second Offer Since March 7, 1996; Contacts with the
Company.  The discussion set forth in Section 11 of the Offer to Purchase,
Section 3 of the First Supplement, Section 5 of the Second Supplement and the
amendments thereto are hereby amended and supplemented as follows:
 
     On March 7, 1997, the United States Court of Appeals for the Third Circuit
affirmed the November 19, 1996 and January 9, 1997 orders of the United States
District Court for the Eastern District of Pennsylvania.
 
     Following execution of the Third Amendment, CSX and NSC entered into
negotiations respecting a joint acquisition of the Company, which negotiations
culminated in execution of the Fourth Amendment, followed by execution of the
CSX/NSC Letter Agreement, on April 8, 1997.
 
     7.  Purpose of the Second Offer and the Merger; Plans for the Company. The
discussion set forth in Section 12 of the Offer to Purchase, Section 6 of the
Second Supplement and the amendments thereto are hereby amended and supplemented
as follows:
 
     See the summary of the CSX/NSC Letter Agreement under Section 8 of this
Third Supplement for a discussion of certain provisions relating to CSX's and
NSC's plans for the Company.
 
     Based upon discussions with the Company, CSX believes that the total
quantifiable benefits to CSX from the Merger and the transactions contemplated
by the CSX/NSC Letter Agreement will be approximately $280 million annually
(versus Conrail's current operations), based on the realization of operating
cost savings of $165 million and a reduction in the requirement for annual
capital spending of $40 million (from operating efficiencies, facility
consolidations, overhead rationalization and other activities) and new traffic
volumes (contributing $75 million) generated by enhanced service.
 
     8.  Merger Agreement; Other Agreements.  The discussion set forth in
Section 13 of the Offer to Purchase, Section 4 of the First Supplement, Section
7 of the Second Supplement and the amendments thereto are hereby amended and
supplemented as set forth below.
 
     The following summary of certain provisions of the CSX/NSC Letter Agreement
is qualified in its entirety by reference to the CSX/NSC Letter Agreement, a
copy of which has been filed with the SEC as an exhibit to the Schedule 14D-1.
Certain capitalized terms used herein without definition have the meanings
assigned to such terms in the CSX/NSC Letter Agreement.
 
     Formation of CSX/NSC Acquisition Sub. The CSX/NSC Letter Agreement provides
that, promptly following the execution of the CSX/NSC Letter Agreement, CSX (or
CSX and NSC) will form a new entity in a form to be selected ("CSX/NSC
Acquisition Sub"). The authorized capital stock or similar equity interests or
units of CSX/NSC Acquisition Sub (the "Equity") will consist solely of two
classes with identical economic and other rights, except that one class will
have voting rights and the other class will not have voting rights. CSX/NSC
Acquisition Sub will be capitalized by CSX and NSC through the Stock
Contributions, which will have a deemed aggregate valuation of $2,898,263,640,
and Cash Contributions, all as described below. Upon and immediately following
the Stock Contributions as described below, the Equity with voting rights of
CSX/NSC Acquisition Sub will be owned 50% by CSX and 50% by NSC (with a deemed
aggregate valuation of $1,886,000,000), and the Equity without voting rights of
CSX/NSC Acquisition Sub will be owned solely by CSX (or its controlled
subsidiary) (with a deemed aggregate valuation of $1,012,263,640) and will
represent 34.94% of the aggregate Equity represented by the outstanding voting
and non-voting Equity of CSX/NSC Acquisition Sub. In connection with each Cash
Contribution made under the CSX/NSC Letter Agreement by CSX (or its controlled
subsidiary) or NSC (or its controlled subsidiary), non-voting Equity will be
issued to the contributing party with a deemed valuation equal to the amount of
the related Cash Contribution.
 
                                        9
<PAGE>   11
 
     Contributions. The CSX/NSC Letter Agreement provides that, through the
mechanics described herein, concurrently with the formation of CSX/NSC
Acquisition Sub, CSX will contribute to CSX/NSC Acquisition Sub all the capital
stock of Purchaser and NSC will contribute to CSX/NSC Acquisition Sub all of its
interest in 8,200,000 Shares (such transactions, the "Stock Contributions"). In
connection with the Stock Contributions, CSX will be permitted to retain 100
Shares outside of CSX/NSC Acquisition Sub (corresponding to the 100 Shares being
retained by NSC outside of CSX/NSC Acquisition Sub). The CSX/NSC Letter
Agreement provides that all Shares currently owned by Purchaser (other than the
100 Shares described above) and held in a voting trust and all Shares currently
owned by AAC and held in a voting trust and all additional Shares acquired
pursuant to the Second Offer and the Merger, will continue to be held in voting
trusts for the benefit of CSX/NSC Acquisition Sub until the Control Date. In
furtherance thereof, without prejudice to CSX's and NSC's obligations to make
the Stock Contributions upon the formation of CSX/NSC Acquisition Sub as
promptly as practicable following the execution of the CSX/NSC Letter Agreement,
upon consummation of the Second Offer, CSX and NSC will cause the Shares
currently held in the CSX and AAC voting trusts to be transferred to a
consolidated voting trust for the benefit of CSX/NSC Acquisition Sub, to which
all additional Shares acquired pursuant to the Second Offer and the Merger will
be transferred for the benefit of CSX/NSC Acquisition Sub. The CSX/NSC Letter
Agreement provides that, in addition to the Stock Contributions described above,
each of CSX (or its controlled subsidiary) and NSC (or its controlled
subsidiary) will contribute cash to CSX/NSC Acquisition Sub to fulfill its
obligations under the CSX/NSC Letter Agreement (including, without limitation,
for the purpose of purchasing in the Second Offer and the Merger all Shares not
already held in the CSX and AAC voting trusts) (each, a "Cash Contribution") in
amounts such that the aggregate cash amount expended (excluding legal,
investment banking and other advisory fees and associated expenses and including
only the amounts paid for the Shares and amounts specifically required under the
CSX/NSC Letter Agreement to be shared by Percentage) to acquire Shares by CSX,
NSC and CSX/NSC Acquisition Sub is borne 42% by CSX and 58% by NSC (the 42%/CSX
and 58%/NSC is referred to as the "Percentage"), valuing all Shares acquired
prior to the date of the CSX/NSC Letter Agreement by CSX at $110 per share and
by NSC at $115 per share; provided that CSX will not be required to make Cash
Contributions to CSX/NSC Acquisition Sub unless and until NSC shall have made at
least $1,757,125,979 in Cash Contributions to CSX/NSC Acquisition Sub. Such Cash
Contributions will be made in accordance with the terms under the subsection
entitled "Formation of CSX/NSC Acquisition Sub" above and at such times as are
required to fulfill obligations under the CSX/NSC Letter Agreement (including,
without limitation, for Purchaser to purchase Shares in the Second Offer and the
Merger). All cash contributed by CSX and NSC to CSX/NSC Acquisition Sub to
purchase Shares in the Second Offer and the Merger in accordance with the
CSX/NSC Letter Agreement will be contributed by CSX/NSC Acquisition Sub to
Purchaser to be used by Purchaser (or Merger Sub) to purchase Shares in
accordance with the Merger Agreement.
 
     The CSX/NSC Letter Agreement provides that CSX's and NSC's obligations to
make the Stock Contributions and the Cash Contributions and their other
obligations under the CSX/NSC Letter Agreement are not subject to the condition
that definitive documentation has been agreed to by CSX and NSC. The only
conditions to CSX's and NSC's obligations to make the Cash Contributions for the
consummation of the Second Offer and the Merger will be those same conditions
applicable to CSX and Purchaser as set forth in the Second Offer and in the
Merger Agreement, respectively. In addition, notwithstanding whether the
conditions to consummation of the Second Offer or Merger are satisfied, CSX and
NSC will be obligated to make Cash Contributions as provided in the CSX/NSC
Letter Agreement or indemnity payments as provided in the CSX/NSC Letter
Agreement in order to satisfy any claims made against CSX and NSC following the
date of the CSX/NSC Letter Agreement under the Merger Agreement or the CSX/NSC
Letter Agreement.
 
     Governance of CSX/NSC Acquisition Sub. The CSX/NSC Letter Agreement
provides that each of CSX and NSC will have equal decision-making authority with
respect to matters relating to CSX/NSC Acquisition Sub and its subsidiaries
(which, following the Stock Contributions, will include Purchaser and Merger
Sub); and that, until the Stock Contributions, CSX will not take any action
concerning the formation, organization, governance or activities of CSX/NSC
Acquisition Sub, without the prior agreement of NSC. Following the Stock
Contributions, each of CSX and NSC will have and may exercise a 50% voting
interest in CSX/NSC Acquisition Sub (which may also be held in one or more
controlled subsidiaries) and will have the
 
                                       10
<PAGE>   12
 
right to appoint 50% of CSX/NSC Acquisition Sub's directors or similar governing
representatives. Each of CSX and NSC will be entitled to appoint a full time
Co-Chief Executive Officer of CSX/NSC Acquisition Sub, and all CSX/NSC
Acquisition Sub executive appointments will be subject to approval by the board
of directors or similar governing body of CSX/NSC Acquisition Sub. In addition,
CSX and NSC will establish a protocol for the management of CSX/NSC Acquisition
Sub as well as a list of those items that will require board approval. Such
provisions will apply equally to the governance of the Company following the
Control Date in order to effectuate the transactions contemplated by the CSX/NSC
Letter Agreement (including on-going operation of Shared Assets) as approved by
the STB.
 
     Second Offer. The CSX/NSC Letter Agreement provides that each of CSX and
NSC will have equal decision-making authority with respect to the Second Offer
and the Merger Agreement including any amendment thereof. In furtherance of the
foregoing, neither CSX nor NSC will, without the prior agreement of the other
party, (x) agree to any modifications of the terms, conditions and/or timing of
the Second Offer or make any determination as to the satisfaction of any
conditions thereto or (y) agree to any modifications of the terms and conditions
of, or give any consent or waiver or exercise any right of termination under,
the Merger Agreement, including without limitation any decision regarding the
exercise of the Company Stock Option or under the provisions of the Merger
Agreement summarized in Section 7 of the Second Supplement under "Interim
Operations of the Company". In addition, upon consummation of the Second Offer,
the Company Stock Option will be cancelled without any consideration paid to
CSX. The CSX/NSC Letter Agreement provides that CSX will not take any action
that would reasonably be expected to result in the Company having a right to
terminate the Merger Agreement in accordance with its terms (and NSC will not
take any action including, without limitation, by withholding consent or making
determinations, in any case, that could reasonably be expected to result in the
Company having a right to terminate the Merger Agreement, including as a result
of a breach by CSX of the Merger Agreement). In addition, CSX will consult and
agree with NSC prior to providing any notices to the Company under the Merger
Agreement and will promptly provide NSC with copies of all written notices
provided by CSX to the Company or received by CSX from the Company under the
Merger Agreement.
 
     Allocation of Assets. The CSX/NSC Letter Agreement provides that, subject
to necessary regulatory approvals and implementation, the Company's routes,
assets in proximity to such routes and certain facilities will be made available
to CSX and NSC, and CSX and NSC will have shared access to certain specified
shared assets, all as specified in an agreed map and certain schedules. The map
reprinted inside the back cover of this Third Supplement shows the approximate
division of the Company's routes as contemplated by the CSX/NSC Letter
Agreement. Such map is intended to be illustrative only and is qualified in its
entirety by reference to the CSX/NSC Letter Agreement itself. Pursuant to this
arrangement, subject to certain exceptions, following the implementation date,
(i) NSC will have use of and responsibility for the management and costs
(including lease costs, if any) of the Altoona and Hollidaysburg shops, and (ii)
CSX will have use of and responsibility for the management and costs (including
lease costs) of the Company headquarters building and the Company information
technology facilities in Philadelphia. Notwithstanding the foregoing, CSX and
NSC will jointly use and have responsibility for certain designated system
support operations, including the management of a portion of the Company
headquarters function and management at system support operations sufficient for
the management of the Surviving Corporation.
 
     The CSX/NSC Letter Agreement provides that generally: rolling stock,
locomotives and work equipment will be allocated to, and made available for use
by, CSX and NSC in accordance with their respective Percentages; all Company
rolling-stock-related inventory and supplies (including rolling-stock-related
system stockpiles) at the Altoona and Hollidaysburg shops as of the Control Date
will be made available to NSC; all Company furniture, fixtures, computers,
office supplies and equipment (other than equipment and system stockpiles of
supplies and inventory, which will be made available as otherwise provided) will
be allocated to the party to whom the related assets are made available; and all
other assets not otherwise specifically made available by the CSX/NSC Letter
Agreement will be pooled assets and will be made available or shared based on
Percentage.
 
     Further Actions. The CSX/NSC Letter Agreement provides that, following the
Control Date, Company lines and assets proposed to be operated by CSX or by NSC
will be segregated from other Company lines and
 
                                       11
<PAGE>   13
 
assets through the creation of subsidiaries or operating divisions or through
other means. Subject to any necessary regulatory approval, CSX and NSC will take
and will cause the Company to take such action as is necessary to name NSC
nominees as the officers and directors of the subsidiary or other entity holding
the lines and assets to be operated by NSC, and to name CSX nominees as the
officers and directors of the subsidiary or other entity holding the line and
assets to be operated by CSX.
 
     The CSX/NSC Letter Agreement provides that it is the parties' current
intention that the Surviving Corporation will be preserved following the Merger,
that the division of the Company assets and the assumption of liabilities
relating to Company assets will be specified in more detail in definitive
documentation and that the Company assets and liabilities will be shared
pursuant to long-term operating agreements, leases, one or more partnerships
and/or limited liability companies and indemnity arrangements which will be set
forth in definitive documentation.
 
     Allocation of Liabilities. The CSX/NSC Letter Agreement contains provisions
regarding the allocation of the Company's liabilities, including
employee-related liabilities, as between CSX and NSC, providing that certain
liabilities will be shared by Percentage, certain liabilities will be allocated
solely to either CSX or NSC and certain liabilities will be allocated to the
party to which the assets related to such liabilities are allocated.
 
     Definitive Documentation. The CSX/NSC Letter Agreement provides that,
promptly after execution of the CSX/NSC Letter Agreement, CSX and NSC will
negotiate in good faith toward reaching and will enter into and execute fuller
documentation with respect to the transactions contemplated by the CSX/NSC
Letter Agreement, which documentation will supersede the CSX/NSC Letter
Agreement.
 
     STB. The CSX/NSC Letter Agreement provides for coordination by CSX and NSC
in seeking STB approval for the transactions contemplated by the Merger
Agreement and the CSX/NSC Letter Agreement.
 
     NSC Second Offer. Pursuant to the CSX/NSC Letter Agreement, NSC has
terminated the NSC Second Offer. NSC had agreed that, upon consummation of the
Second Offer as modified in accordance with the CSX/NSC Letter Agreement, NSC
will withdraw its letter relating to the Company's 1997 Annual Meeting of
Shareholders and, until such withdrawal, will take no action in furtherance of
the matters covered by such letter without CSX's consent, unless the date of the
Company's 1997 Annual Meeting of Shareholders is changed.
 
     Litigation. The CSX/NSC Letter Agreement provides that, promptly following
execution of the CSX/NSC Letter Agreement, CSX and NSC will take such action as
is necessary to dismiss with prejudice all pending lawsuits between the parties
relating to the acquisition of the Company, and CSX, under the Merger Agreement,
will not consent to the taking of any action by the Company respecting, and,
following the Merger will request pursuant to the Merger Agreement the dismissal
with prejudice of, all claims and litigation against NSC, its officers and
affiliates relating to the Company acquisition. In addition, CSX will request
pursuant to the Merger Agreement that the Company join in a stay or similar
adjournment of any such proceeding.
 
     Certain Obligations; Indemnification. The CSX/NSC Letter Agreement provides
that CSX and NSC will cause the Surviving Corporation to honor all commitments
of the Surviving Corporation under the Merger Agreement. Except as may otherwise
be provided in the CSX/NSC Letter Agreement, to the extent that, following the
date of the CSX/NSC Letter Agreement, any claims are made under or in connection
with the Merger Agreement against the Surviving Corporation, CSX or NSC or any
of their respective affiliates, CSX and NSC will share any liability thereunder
by Percentage, and each of CSX and NSC will indemnify the other for its
proportionate share according to Percentage, except to the extent that any such
liability results from a breach by the indemnified party of the terms of the
CSX/NSC Letter Agreement. However, the indemnification contemplated in the
foregoing sentence will not cover certain liabilities to be borne solely by CSX
or NSC.
 
     The following summary of certain provisions of the Merger Agreement, as
amended through the Fourth Amendment, is qualified in its entirety by the full
text of the Merger Agreement and the amendments thereto, copies of which have
been filed with the SEC as exhibits to the Schedule 14D-1.
 
                                       12
<PAGE>   14
 
     The Merger. Under the Fourth Amendment, upon the terms and subject to the
conditions set forth in the Merger Agreement, and in accordance with the
Pennsylvania Law, Merger Sub will be merged with and into the Company at the
Effective Time. The Company will be the surviving corporation of the Merger and
will succeed to and assume all rights and obligations of Merger Sub in
accordance with the Pennsylvania Law. The articles of incorporation and by-laws
of Merger Sub, as in effect immediately prior to the Effective Time, will be the
articles of incorporation and by-laws, respectively, of the Surviving
Corporation until thereafter changed or amended as provided therein or by
applicable law, provided that the articles of incorporation of the Surviving
Corporation will provide that the Surviving Corporation will be named "Conrail
Inc."
 
     Voting Trust. Under the Fourth Amendment, CSX and the Company have agreed
that, simultaneously with the purchase by CSX, Purchaser or their affiliates of
Shares pursuant to the Second Offer, the Company Stock Option Agreement or
otherwise, such Shares will be deposited in a voting trust (the "Voting Trust")
in accordance with the terms and conditions of a voting trust agreement
substantially in the form attached to the Merger Agreement (the "Voting Trust
Agreement"). Subject to applicable law and to the rules, regulations and
practices of the STB, the Voting Trust may be modified or amended, and other
voting trusts may be employed with respect to Common Shares, at any time by CSX
in its sole discretion (provided that the terms of the Voting Trust governing
the voting of or transfer or disposition of Common Shares will not be amended
prior to the consummation of the Second Offer without the Company's consent and
provided further that the Company has consented to the adoption of an amended
and restated voting trust agreement substantially in the form attached to the
Fourth Amendment (the "CSX/NSC Voting Trust Agreement"), the CSX/NSC Voting
Trust Agreement not to be effective prior to the consummation of the Second
Offer without the Company's consent).
 
     Conversion of Shares. Under the Fourth Amendment, each share of Common
Stock, par value $1.00 per share, of Merger Sub issued and outstanding
immediately prior to the Effective Time will, at the Effective Time, by virtue
of the Merger and without any action on the part of any person, become one duly
authorized, validly issued, fully paid and nonassessable share of common stock
of the Surviving Corporation.
 
     Representations and Warranties. Under the Fourth Amendment, the Company has
made representations and warranties with respect to the Rights Agreement and
state anti-takeover laws.
 
     In connection with the Fourth Amendment, other than with respect to the
Pennsylvania Control Transaction Law, the Company has represented that its Board
of Directors has taken all action necessary or advisable so as to render
inoperative with respect to the transactions contemplated by the Merger
Agreement (including the Offer, the Second Offer, the Merger and the execution,
delivery and performance of the transactions contemplated by the CSX/NSC Letter
Agreement) or by the Company Stock Option Agreement or the CSX/NSC Letter
Agreement all applicable state anti-takeover statutes.
 
     In connection with the Fourth Amendment, the Company has represented that
the Company Rights Agreement has been amended (collectively, the "Company Rights
Plan Amendment") to (i) render the Company Rights Agreement inapplicable to the
Offer, the Second Offer, the Merger and the other transactions contemplated by
the Merger Agreement, the Company Stock Option Agreement and the CSX/NSC Letter
Agreement or any purchases of Shares under the Pennsylvania Control Transaction
Law, and (ii) ensure that (y) neither CSX nor any of its controlled subsidiaries
nor NSC nor any of its controlled subsidiaries nor any other entity formed for
the purpose of acquiring the Company wholly owned by CSX and NSC is an Acquiring
Person (as defined in the Company Rights Agreement) pursuant to the Company
Rights Agreement and (z) a Shares Acquisition Date, Distribution Date or Trigger
Event (in each case as defined in the Company Rights Agreement) does not occur
by reason of the approval, execution or delivery of the Merger Agreement, the
Company Stock Option Agreement or the CSX/NSC Letter Agreement, or the
consummation of the Offer, the Second Offer or the Merger or the consummation of
the other transactions contemplated by the Merger Agreement, the Company Stock
Option Agreement or the CSX/NSC Letter Agreement or any purchases of Shares
under the Pennsylvania Control Transaction Law, and the Company Rights Agreement
may not be further amended by the Company without the prior consent of CSX in
its sole discretion.
 
                                       13
<PAGE>   15
 
     Interim Operations of the Company. Under the Fourth Amendment, the Company
has agreed that, following the date of the Third Amendment, its Board of
Directors will not declare, and the Company will not pay, any dividend on the
Company's capital stock with a record date on or prior to May 30, 1997.
 
     Shareholders' Meetings. Under the Fourth Amendment, the Company has agreed
not to take any action to change the date set for its 1997 Annual Meeting from
December 19, 1997 without the prior consent of CSX in its sole discretion.
 
     Anti-Takeover Laws. Under the Fourth Amendment, the Company has agreed to
(i) take all action necessary to ensure that no state anti-takeover statute or
similar statute or regulation is or becomes operative with respect to the Second
Offer, the Merger, the Merger Agreement, the Company Stock Option Agreement, the
CSX/NSC Letter Agreement or any of the transactions contemplated by the Merger
Agreement, the CSX/NSC Letter Agreement or the Company Stock Option Agreement
and (ii) if any state anti-takeover statute or similar statute or regulation is
or becomes operative with respect to the Second Offer, the Merger, the Merger
Agreement, the Company Stock Option Agreement, the CSX/NSC Letter Agreement or
any transaction contemplated by the Merger Agreement, the CSX/NSC Letter
Agreement or the Company Stock Option Agreement, take all action necessary to
ensure that the Second Offer, the Merger and the other transactions contemplated
by the Merger Agreement, the CSX/NSC Letter Agreement and the Company Stock
Option Agreement may be consummated as promptly as practicable on the terms
contemplated by the Merger Agreement, the CSX/NSC Letter Agreement and the
Company Stock Option Agreement and otherwise to minimize the effect of such
statute or regulation on the Merger and the other transactions contemplated by
the Merger Agreement, the CSX/NSC Letter Agreement and the Company Stock Option
Agreement.
 
     Rights Agreement. Under the Fourth Amendment, the Company has agreed that
its Board of Directors will take all further action (in addition to that
referred to above) reasonably requested in writing by CSX (including redeeming
the Company Rights immediately prior to the Effective Time or amending the
Company Rights Agreement) in order to render the Company Rights inapplicable to
the Offer, the Second Offer, the Merger and the other transactions contemplated
by the Merger Agreement, the Company Stock Option Agreement and the CSX/NSC
Letter Agreement. Except as provided above with respect to the Offer, the Merger
and the other transactions contemplated by the Merger Agreement, the Company
Stock Option Agreement and the CSX/NSC Letter Agreement, the Board of Directors
of the Company will not (a) amend the Company Rights Agreement or (b) take any
action with respect to, or make any determination under, the Company Rights
Agreement, including a redemption of the Company Rights or any action to
facilitate a Takeover Proposal in respect of the Company.
 
     9.  Dividends and Distributions.  The discussion set forth in Section 14 of
the Offer to Purchase and the amendments thereto are hereby amended and
supplemented as follows:
 
     The Company has agreed in the Fourth Amendment that, following April 8,
1997, its Board of Directors will not declare, and the Company will not pay, any
dividend on the Company's capital stock with a record date on or prior to May
30, 1997.
 
     In connection with the foregoing, the (green) Letter of Transmittal
provides that, by executing a Letter of Transmittal as set forth above, or
failing to withdraw a Letter of Transmittal already executed and delivered, a
tendering shareholder irrevocably appoints designees of Purchaser as such
shareholder's proxies, each with full power of substitution, to the full extent
of such shareholder's rights with respect to the Shares tendered by such
shareholder and accepted for payment by Purchaser (and any and all cash or
noncash dividends (other than regular quarterly cash dividends except as
provided below), distributions, rights, other Shares, or other securities issued
or issuable in respect of such Shares on or after the date of the Merger
Agreement and any cash dividends, including regular quarterly cash dividends,
declared or paid on or after April 8, 1997 with a record date on or prior to May
30, 1997). See the (green) Letter of Transmittal circulated with this Third
Supplement.
 
                                       14
<PAGE>   16
 
     10.  Certain Legal Matters; Regulatory Approvals.  The discussion set forth
in Section 16 of the Offer to Purchase, Section 6 of the First Supplement,
Section 9 of the Second Supplement and the amendments thereto are hereby amended
and supplemented as follows:
 
     STB Matters; Acquisition of Control.  STB approval or exemption of the
Merger is not a condition to the Merger. However, the acquisition of control
over the Company by CSX, NSC and their respective affiliates requires STB
approval or exemption. CSX and NSC intend to file a joint application with the
STB for control and division of the Company and for such other matters involved
in such division as might be required to be approved by the STB. CSX and NSC are
filing a new Notice of Intent to File Railroad Control Application and are
requesting a waiver that would permit them to file their joint application prior
to the date that is three months from the date of the filing of the Notice of
Intent. CSX and NSC are also requesting that the respective dockets previously
established by the STB for the separate CSX and NSC applications for control of
the Company be dismissed. In addition, CSX and NSC are filing a request that the
STB establish an expedited procedural schedule to consider CSX's and NSC's joint
application in light of the fact that the STB will not be required to consider
two competing applications for control of the Company. The STB approval process
described in "STB Matters; Acquisition of Control," "Conditions" and "Judicial
Review -- Stay" in Section 16 of the Offer to Purchase, as amended by Section 6
of the First Supplement and Section 9 of the Second Supplement, would be
applicable to the joint application to be filed by CSX and NSC seeking STB
approval of acquisition of control over, or division of, the Company.
 
     STB Matters; The Voting Trust.  The Amended Voting Trust Agreement
described in Section 9 of the Second Supplement has not been executed by the
parties or submitted to the STB staff for an informal opinion that the use of
the Amended Voting Trust Agreement would effectively insulate CSX and its
affiliates from a violation of the governing statute and STB policy that would
result from an unauthorized acquisition by CSX of a sufficient interest in the
Company to result in control of the Company. CSX intends that the provisions of
the original Voting Trust Agreement, dated October 15, 1996, between CSX,
Purchaser and the Voting Trustee (which is currently in effect), or the Amended
Voting Trust Agreement will govern the Voting Trust until the consummation of
the Second Offer.
 
     CSX and NSC intend to enter into the CSX/NSC Voting Trust Agreement which
provides for a consolidated voting trust to hold the Shares current beneficially
owned by CSX and NSC and held in voting trusts and Shares to be acquired
pursuant to the Second Offer. In that regard, it is contemplated that, effective
upon the consummation of the Second Offer and the Merger, NSC will cause
8,200,000 Shares currently beneficially owned by NSC and held in the AAC voting
trust to be transferred to the Voting Trustee to be held as Trust Stock under
the CSX/NSC Voting Trust Agreement. The parties to the CSX/NSC Voting Trust
Agreement would be CSX, NSC, Purchaser and CSX/NSC Acquisition Sub.
 
     CSX and NSC have not reached final agreement on the terms of the CSX/NSC
Voting Trust Agreement. It is contemplated that the CSX/NSC Voting Trust
Agreement would become effective only upon the consummation of the Second Offer.
 
     If CSX determines that it wishes the Amended Voting Trust Agreement to
govern the Voting Trust until the consummation of the Second Offer, CSX will
obtain an opinion of counsel that STB approval is not required for such
amendment and will seek an informal opinion from the STB staff that use of the
Voting Trust under the Amended Voting Trust Agreement would effectively insulate
CSX and its affiliates from a violation of the governing statute and STB policy.
In addition, if CSX and NSC reach an agreement as to the CSX/NSC Voting Trust
Agreement, CSX and NSC would obtain an opinion of counsel and seek an informal
opinion from the STB staff that use of the CSX/NSC Voting Trust Agreement would
effectively insulate CSX, NSC and their affiliates from a violation of the
governing statute and STB policy. CSX believes that the Amended Voting Trust
Agreement is consistent with the STB's policies regarding voting trusts, and CSX
and NSC intend that the CSX/NSC Voting Trust Agreement would be consistent with
the STB's policies regarding voting trusts, but there can be no assurance that
the STB staff will provide the requested opinion.
 
     It is also possible that the U.S. Department of Justice or railroad
competitors of CSX or NSC, or others, may argue that CSX, NSC and their
respective affiliates should not be permitted to use the voting trust
 
                                       15
<PAGE>   17
 
mechanism to acquire Shares and effectuate the Merger prior to final STB
approval of the acquisition of control of the Company. CSX and NSC believe it is
unlikely that such arguments would prevail, but there can be no assurance in
this regard.
 
     Pennsylvania Control Transaction Law -- General.  The following summary of
the provisions of the Pennsylvania Control Transaction Law is qualified in its
entirety by reference to such law, the full text of which is attached hereto as
Appendix A. THIS DISCUSSION AND APPENDIX SHOULD BE REVIEWED CAREFULLY BY ANY
SHAREHOLDER WHO WISHES TO EXERCISE STATUTORY APPRAISAL RIGHTS OR WHO WISHES TO
PRESERVE THE RIGHT TO DO SO BECAUSE FAILURE STRICTLY TO COMPLY WITH ANY OF THE
PROCEDURAL REQUIREMENTS OF THE LAW MAY RESULT IN A FORFEITURE OR WAIVER OF
RIGHTS. All references to a shareholder or a Company shareholder in the
Pennsylvania Control Transaction Law and this summary are to the record holder
of Company stock as to which appraisal rights under the Pennsylvania Control
Transaction Law are asserted. A person having a beneficial interest in Shares
that is held of record in the name of another person, such as a broker or
nominee, must follow the steps summarized below to perfect rights under the
Pennsylvania Control Transaction Law.
 
THE FOLLOWING CONSTITUTES NOTICE UNDER THE PENNSYLVANIA CONTROL TRANSACTION LAW
AS REQUIRED THEREUNDER.
 
     Under the Pennsylvania Control Transaction Law, by virtue of entering into
the CSX/NSC Letter Agreement, which may be considered a "control transaction"
for purposes of the Pennsylvania Control Transaction Law, any holder of record
of Shares as of April 8, 1997 is entitled to make written demand on CSX, NSC or
Purchaser for payment of cash in an amount equal to the "fair value" (as defined
in the Pennsylvania Control Transaction Law) of each Share as of the date on
which the "control transaction" occurs. Under the Pennsylvania Control
Transaction Law, "fair value" is defined as a value not less than the highest
price paid per share by the controlling person or group at any time during the
90-day period ending on and including the date of the control transaction (i.e.,
from January 9, 1997 through April 8, 1997) plus an increment representing any
value (including, without limitation, any proportion of any value for
acquisition of control of the corporation) that may not be reflected in such
price. Under this definition of "fair value", the minimum value that a holder of
Shares would be entitled to receive would be the $115 per Share paid in the NSC
First Offer.
 
     CSX, NSC and Purchaser believe and intend to take the position that "fair
value" under the Pennsylvania Control Transaction Law is $115 per Share without
interest thereon. However, if a holder of record of Shares believes that the
"fair value" of his Shares is higher than $115 per Share, he is entitled to an
appraisal procedure for determining the fair value of his Shares. To facilitate
this procedure, as required by the Pennsylvania Control Transaction Law, CSX,
NSC and Purchaser have filed a petition with the caption In Re: Conrail Inc.
Statutory Proceeding Pursuant to Subchapter 25E of the Pennsylvania Business
Corporation Law/Petition For Determination of Fair Value Pursuant to 15 Pa. C.S.
sec.sec.2545 and 2547 in the Court of Common Pleas of Philadelphia County (the
"Court"), April Term, 1997, No. 704. The Court is located at 280 City Hall,
Philadelphia, PA 19107, and any holder electing to proceed with a
court-appointed appraiser under the Pennsylvania Control Transaction Law should
send the required forms (as described below) to the Court at such address before
the date indicated in the next paragraph.
 
     Procedure for Demand. To validly perfect a demand under the Pennsylvania
Control Transaction Law, a record holder must, within 20 days following the date
of this Third Supplement, make written demand on CSX, NSC or Purchaser for
payment of the "fair value" of such record holder's Shares. Any such demand must
state the number and class or series of the Shares owned by the demanding
shareholder with respect to which the demand is made. Such notice should be sent
to Green Acquisition Corp. c/o CSX Corporation, One James Center, 901 East Cary
Street, Richmond, Virginia 23219, Attention: Mark G. Aron, with a copy to
Norfolk Southern Corporation, Three Commercial Place, Norfolk, Virginia 23510,
Attention: James C. Bishop, Jr. If, within 10 days after the date that Purchaser
accepts for payment Shares pursuant to the Second Offer or terminates the Second
Offer (the 10th such day referred to herein as the "Impasse Date"), CSX, NSC or
Purchaser, on the one hand, and any demanding shareholder, on the other hand,
are unable to agree
 
                                       16
<PAGE>   18
 
on the fair value of the Shares or a binding procedure for the determination of
fair value with respect to which the demand has been made, then any such
demanding shareholder who desires to obtain the rights and remedies described
below may, at any time until 30 days following the Impasse Date, surrender to
the Court certificates for the Shares, duly endorsed for transfer to CSX, NSC or
Purchaser, with a notice stating that the certificates are being surrendered to
the Court in connection with the petition filed with the Court discussed above.
Any shareholder failing to give such notice and surrender his certificates will
have no further right to receive payment under the Pennsylvania Control
Transaction Law for such Shares, and in accordance with the Merger Agreement
such Shares will be converted in the Merger into the right to receive the Merger
Consideration. All certificates surrendered to the Court will be held in escrow
for CSX, NSC and Purchaser; and, following the expiration of the period in which
certificates may be validly surrendered, the Court will provide a notice to CSX,
NSC and Purchaser as to the number of Shares so surrendered. Under the
Pennsylvania Control Transaction Law, CSX, NSC or Purchaser will then be
required to make a "partial payment" for Shares so surrendered within 10
business days of receipt of the Court's notice at a per Share price equal to the
"partial payment" amount, which amount shall be paid by the Court to the
demanding shareholders who have validly surrendered certificates. Under the
Pennsylvania Control Transaction Law, a "partial payment" is $115 in cash, which
is the highest price paid per Share by the controlling person or group from
January 9, 1997 through April 8, 1997.
 
     Payment of Fair Value. Pursuant to Section 14(d) of the Exchange Act and
rules promulgated thereunder by the SEC, none of Purchaser, CSX or NSC may,
directly or indirectly, purchase or make any arrangement to purchase any Shares
otherwise than pursuant to the Second Offer during the pendency of the Second
Offer. Consequently, CSX, NSC and Purchaser will not make payment on any demand
for payment until after the Second Offer is consummated or terminated; and the
Impasse Date has been set by CSX, NSC and Purchaser in recognition of the
foregoing restrictions under the Exchange Act applicable to Purchaser, CSX and
NSC. Promptly after consummation or termination of the Second Offer, CSX, NSC or
Purchaser shall take the position that the "fair value" of such Shares is, and
offer payment to holders of Shares who have made demand under the Pennsylvania
Control Transaction Law in the amount of, $115 per Share in cash without
interest.
 
     Appraisal Procedure. Upon receipt of any Share certificate surrendered as
provided above, the Court shall, as soon as practicable but in any event within
30 days, appoint an appraiser with experience in appraising share values of
companies of like nature to the Company to determine the fair value for the
Shares so surrendered. The appraiser so appointed by the Court shall, as soon as
reasonably practicable, determine the "fair value" of the Shares subject to its
appraisal and the appropriate market rate of interest on the amount then owed by
CSX, NSC and Purchaser to the holders of such Shares. The determination of any
appraiser so appointed by the Court shall be final and binding on CSX, NSC and
Purchaser and on all shareholders who so surrendered their Share certificates to
the Court, except that the determination of the appraiser shall be subject to
review to the extent and within the time provided or prescribed by law in the
case of other appointed judicial officers.
 
     Shareholders who surrender certificates for Shares as described above to
the Court will retain the right to vote their Shares and receive dividends or
other distributions thereon until the Court receives payment in full for each of
the Shares so surrendered of the "partial payment" amount, and thereafter such
rights shall become those of CSX, NSC and Purchaser. In addition, the fair value
(as determined by the appraiser) of any such dividends or other distributions so
received by the surrendering shareholder shall be subtracted from any amount
owing to such shareholder under the Pennsylvania Control Transaction Law.
 
     Costs and Expenses of Valuation Proceedings. The costs and expense of any
appraiser or other agents appointed by the Court in the appraisal procedure will
be assessed against CSX, NSC and Purchaser. The costs and expenses of any other
procedure to determine fair value shall be paid as agreed to by the parties
agreeing to the procedure.
 
     Norfolk Southern Litigation and Shareholder Litigation. The CSX/NSC Letter
Agreement provides that, promptly following execution of the CSX/NSC Letter
Agreement, CSX and NSC will take such action as is necessary to dismiss with
prejudice all pending lawsuits between the parties relating to the acquisition
of the Company, and CSX, under the Merger Agreement, will not consent to the
taking of any action by the
 
                                       17
<PAGE>   19
 
Company respecting, and, following the Merger will request pursuant to the
Merger Agreement the dismissal with prejudice of, all claims and litigation
against NSC, its officers and affiliates relating to the Company acquisition. In
addition, CSX will request pursuant to the Merger Agreement that the Company
join in a stay or similar adjournment of any such proceeding.
 
     11. Fees and Expenses. The discussion set forth in Section 17 of the Offer
to Purchase and the amendments thereto are hereby amended and supplemented as
follows:
 
     Except as set forth below, NSC will not pay any fees or commissions to any
broker, dealer or other person for soliciting tenders of Shares pursuant to the
Second Offer. Merrill Lynch, Pierce, Fenner & Smith Incorporated and J.P. Morgan
Securities Inc. (the "NSC Dealer Managers") together with Wasserstein Perella &
Co., Inc. are acting as Dealer Managers in connection with the Second Offer and
the Merger. NSC paid each of the NSC Dealer Managers an advisory fee of
$2,500,000 upon the commencement of the NSC First Offer. Upon the earliest to
occur of (i) the successful closing of any tender offer by NSC or one or more
persons formed by or affiliated with NSC (an "NSC Affiliate") for securities of
the Company (defined as the acceptance for payment by NSC or an NSC Affiliate of
a majority of the Company's outstanding capital stock), (ii) the execution of a
definitive agreement providing for (a) any merger, consolidation, reorganization
or other business combination pursuant to which the business of the Company is
combined with NSC or one or more persons formed by or affiliated with NSC,
including without limitation, any joint venture (a "Business Combination"), (b)
the acquisition by NSC or an NSC Affiliate by way of a tender or exchange offer,
negotiated purchase or other means of a majority of the then outstanding capital
stock of the Company, (c) the acquisition, directly or indirectly, by NSC or an
NSC Affiliate of all or a substantial portion of the assets, revenues or income
of the Company (an "Asset Acquisition"), or (d) the acquisition, directly or
indirectly, by NSC or an NSC Affiliate of control of the Company through a proxy
contest, NSC has agreed to pay each of the NSC Dealer Managers an additional
advisory fee of $2,500,000. In addition, NSC has agreed to pay each of the NSC
Dealer Managers a success fee of .125% of the aggregate transaction value (less
the amount of any previously paid advisory fees) upon the consummation of a
Business Combination or Asset Acquisition. Parent has also agreed to reimburse,
directly or indirectly, the NSC Dealer Managers (in their capacities as NSC
Dealer Managers and financial advisors) for their reasonable out-of-pocket
expenses, including the reasonable fees and expenses of their legal counsel,
incurred in connection with their engagement and to indemnify such firms and
certain related persons against certain liabilities and expenses in connection
with their engagement, including certain liabilities under the federal
securities laws. The NSC Dealer Managers have rendered various investment
banking and other advisory services to NSC and its affiliates in the past and
are expected to continue to render such services for which they have received
and will continue to receive customary compensation from NSC and its affiliates.
The NSC Dealer Managers and/or their affiliates, in their capacity as arrangers
and/or lenders, may also receive fees from NSC in connection with the
activities.
 
                            GREEN ACQUISITION CORP.
 
April 10, 1997
 
                                       18
<PAGE>   20
 
                                   SCHEDULE A
 
               INFORMATION CONCERNING THE DIRECTORS AND EXECUTIVE
 
                            OFFICERS OF NSC AND AAC
 
     1.  Directors and Executive Officers of NSC.  Set forth below is the name,
current business address, citizenship and the present principal occupation or
employment and material occupations, positions, offices or employments for the
past five years of each director and executive officer of NSC. Unless otherwise
indicated, each person identified below is employed by NSC. The principal
address of NSC and, unless otherwise indicated below, the current business
address for each individual listed below is Three Commercial Place, Norfolk,
Virginia 23510. Directors are identified by an asterisk. Each such person is a
citizen of the United States.
 
<TABLE>
<CAPTION>
        NAME AND PRINCIPAL                  PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT
         BUSINESS ADDRESS                        AND FIVE-YEAR EMPLOYMENT HISTORY
- -----------------------------------  --------------------------------------------------------
<S>                                  <C>
David R. Goode*....................  Chairman, President and Chief Executive Officer (since
                                     September 1992); President (from October 1991 to
                                     September 1992); and prior thereto was Executive Vice
                                     President -- Administration; Director, Caterpillar, Inc.
                                     (since June 1993); Director, Georgia -- Pacific
                                     Corporation (since July 1992); Director, TRINOVA
                                     Corporation (since January 1993); Director, Texas
                                     Instruments Incorporated (since February 1996).
James C. Bishop, Jr................  Executive Vice President -- Law (since March 1996); and
                                     prior thereto was Vice President -- Law.
R. Alan Brogan.....................  Executive Vice President -- Transportation Logistics and
  P.O. Box 988                       President, North American Van Lines, Inc. (since
  Fort Wayne, IN 46801 -- 0988       December 1992); Vice President -- Quality Management
                                     (from April 1991 to December 1992); and prior thereto
                                     was Vice President -- Material Management and Property
                                     Services.
L.I. Prillaman.....................  Executive Vice President -- Marketing (since October
                                     1995); Vice President -- Properties (from December 1992
                                     to October 1995); and prior thereto was Vice President
                                     and Controller.
Stephen C. Tobias..................  Executive Vice President -- Operations (since July
                                     1994); Senior Vice President -- Operations (from October
                                     1993 to July 1994); Vice President -- Strategic Planning
                                     (from December 1992 to October 1993); and prior thereto
                                     was Vice President -- Transportation; Director, TTX
                                     Company (since January 1993).
Henry C. Wolf......................  Executive Vice President -- Finance (since June 1993);
                                     and prior thereto was Vice President -- Taxation;
                                     Director, Greater Norfolk Corporation (since May 1994);
                                     Director, Shenandoah Life (since November 1995).
William B. Bales...................  Senior Vice President -- International (since October
  110 Franklin Rd., S.E.             1995); Vice President -- Coal Marketing (from August
  Roanoke, VA 24012                  1993 to October 1995); and prior thereto was Vice
                                     President -- Coal and Ore Traffic.
Paul N. Austin.....................  Vice President -- Personnel (since June 1994); Assistant
                                     Vice President -- Personnel (from February 1993 to June
                                     1994); and prior thereto was Director -- Compensation.
</TABLE>
 
                                       A-1
<PAGE>   21
 
<TABLE>
<CAPTION>
        NAME AND PRINCIPAL                  PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT
         BUSINESS ADDRESS                        AND FIVE-YEAR EMPLOYMENT HISTORY
- -----------------------------------  --------------------------------------------------------
<S>                                  <C>
John F. Corcoran...................  Vice President -- Public Affairs (since March 1992); and
  1500 K Street, N.W.,               prior thereto was Assistant Vice President -- Public
  Suite 375                          Affairs.
  Washington, DC 20005
David A. Cox.......................  Vice President -- Properties (since December 1995); and
                                     prior thereto was Assistant Vice President -- Industrial
                                     Development.
Thomas L. Finkbiner................  Vice President -- Intermodal (since August 1993); Senior
                                     Assistant Vice President -- International and Intermodal
                                     (from April to August 1993); and prior thereto was
                                     Assistant Vice President -- International and
                                     Intermodal.
Robert C. Fort.....................  Vice President -- Public Relations (since December
                                     1996); and prior thereto was Assistant Vice
                                     President -- Public Relations.
John W. Fox, Jr....................  Vice President -- Coal Marketing (since October 1995);
  110 Franklin Rd., S.E.             Assistant Vice President -- Coal Marketing (from August
  Roanoke, VA 24042                  1993 to October 1995); and prior thereto was General
                                     Manager Eastern Region.
Thomas J. Golian...................  Vice President (since October 1995); Executive Assistant
                                     to the Chairman, President and Chief Executive Officer
                                     (from April 1993 to October 1995); and prior thereto was
                                     Special Assistant to the President.
James L. Granum....................  Vice President -- Public Affairs (since March 1992); and
  1500 K Street, N.W.                prior thereto was Assistant Vice President -- Public
  Suite 375                          Affairs.
  Washington, DC 20005
James A. Hixon.....................  Vice President -- Taxation (since June 1993); and prior
                                     thereto was Assistant Vice President -- Tax Counsel.
Jon L. Manetta.....................  Vice President -- Transportation & Mechanical (since
                                     December 1995); Vice President -- Transportation (from
                                     June 1994 to December 1995); Assistant Vice
                                     President -- Transportation (from October 1993 to June
                                     1994); Assistant Vice President -- Strategic Planning
                                     (from January 1993 to October 1993); Director Joint
                                     Facilities and Budget (from March 1992 to January 1993);
                                     and prior thereto was Assistant Terminal
                                     Superintendent -- Transportation; Director, Beaver
                                     Street Tower Company (since July 1994); Director,
                                     Norfolk and Portsmouth Belt Line Railroad Company (since
                                     July 1994); Director, Belt Railway Company of Chicago
                                     (since September 1994).
Harold C. Mauney, Jr...............  Vice President -- Operations Planning and Budget (since
                                     December 1996); Vice President -- Quality Management
                                     (from December 1992 to December 1996); Assistant Vice
                                     President -- Quality Management (from April 1991 to
                                     December 1992); and prior thereto was General
                                     Manager -- Intermodal Transportation Services.
Donald W. Mayberry.................  Vice President -- Research and Tests (since December
  110 Franklin Rd., S.E.             1995); and prior thereto was Vice
  Roanoke, VA 24042                  President -- Mechanical.
</TABLE>
 
                                       A-2
<PAGE>   22
 
<TABLE>
<CAPTION>
        NAME AND PRINCIPAL                  PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT
         BUSINESS ADDRESS                        AND FIVE-YEAR EMPLOYMENT HISTORY
- -----------------------------------  --------------------------------------------------------
<S>                                  <C>
James W. McClellan.................  Vice President -- Strategic Planning (since October
                                     1993); Assistant Vice President -- Corporate Planning
                                     (from March 1992 to October 1993); and prior thereto was
                                     Director -- Corporate Development.
Kathryn B. McQuade.................  Vice President -- Internal Audit (since December 1992);
  110 Franklin Rd., S.E.             Director -- Income Tax Administration (from May 1991 to
  Roanoke, VA 24042                  December 1992); and prior thereto was
                                     Director -- Federal Income Tax Administration.
Charles W. Moorman.................  Vice President -- Information Technology (since October
                                     1993); Vice President -- Employee Relations (from
                                     December 1992 to October 1993); Vice
                                     President -- Personnel and Labor Relations (from
                                     February to December 1992); Assistant Vice President --
                                     Stations, Terminals and Transportation Planning (from
                                     March 1991 to February 1992); and prior thereto was
                                     Senior Director Transportation Planning.
Phillip R. Ogden...................  Vice President -- Engineering (since December 1992); and
  99 Spring Street, S.W.             prior thereto was Assistant Vice
  Atlanta, GA 30303                  President -- Maintenance; Director, Norfolk and
                                     Portsmouth Belt Line Railroad Company (since December
                                     1993).
John P. Rathbone...................  Vice President and Controller (since December 1992); and
                                     prior thereto was Assistant Vice President -- Internal
                                     Audit.
William J. Romig...................  Vice President and Treasurer (since April 1992); and
                                     prior thereto was Assistant Vice President -- Finance.
Donald W. Seale....................  Vice President -- Merchandise Marketing (since August
                                     1993); Assistant Vice President -- Sales and Service
                                     (from May 1992 to August 1993); and prior thereto was
                                     Director -- Metals, Waste and Construction.
Robert S. Spenski..................  Vice President -- Labor Relations (since June 1994); and
                                     prior thereto was Senior Assistant Vice
                                     President -- Labor Relations.
Rashe W. Stephens..................  Vice President -- Quality Management (since December
                                     1996); and prior thereto was Assistant Vice
                                     President -- Public Affairs.
William C. Wooldridge..............  Vice President -- Law (since March 1996); prior thereto
                                     was General Counsel -- Corporate.
Dezora M. Martin...................  Corporate Secretary (since April 1995); Assistant
                                     Corporate Secretary (from October 1993 to April 1995);
                                     and prior thereto was Assistant Corporate
                                     Secretary -- Planning.
Gerald L. Baliles*.................  Director (since 1990); Partner, Hunton & Williams (since
  Hunton & Williams                  1990); Director, Dibrell Brothers, Inc. (from March 1992
  951 E. Byrd St.                    to March 1995) and Newport News Shipbuilding Inc. (since
  Riverfront Plaza, East Tower       1997).
  Richmond, VA 23219-4074
Carroll A. Campbell, Jr.*..........  Director (since July 1996); President and Chief
  American Council of                Executive Officer, American Council of Life Insurance
     Life Insurance                  (since January 1995); Governor of South Carolina (from
  1001 Pennsylvania Ave., N.W.       January 1987 to January 1995); Director, AVX Corporation
  Washington, DC 20004               (since July 1995), Director, FLUOR Corporation (since
                                     January 1995).
</TABLE>
 
                                       A-3
<PAGE>   23
 
<TABLE>
<CAPTION>
        NAME AND PRINCIPAL                  PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT
         BUSINESS ADDRESS                        AND FIVE-YEAR EMPLOYMENT HISTORY
- -----------------------------------  --------------------------------------------------------
<S>                                  <C>
Gene R. Carter*....................  Director (since 1992); Executive Director, Association
  Association for Supervision        for Supervision and Curriculum Development (since July
     and Curriculum Development      1992); Superintendent of Schools, Norfolk, Virginia
  1250 N. Pitt Street                (from July 1983 to June 1992).
  Alexandria, VA 22314-1403
L. E. Coleman*.....................  Director (since 1982); Chairman, The Lubrizol
  7 Trillium Lane, Eastman           Corporation (from January 1996 to March 1996); Chairman
  Grantham, NH 03753                 of the Board and CEO (from April 1982 to December 1995);
                                     Director, The Lubrizol Corporation (since at least
                                     1991); and Director, Harris Corporation (since January
                                     1985).
T. Marshall Hahn, Jr.*.............  Director (since 1985); Honorary Chairman of the Board,
  Georgia-Pacific Corporation        Georgia-Pacific Corporation (since December 1993),
  P.O. Box 105605                    Chairman of the Board (from May 1993 to December 1993),
  Atlanta, GA 30348-5605             Chairman of the Board and Chief Executive Officer (from
                                     February 1985 to May 1993); Director, SunTrust Banks,
                                     Inc. (since July 1984); Director, Trust Company Bank of
                                     Georgia (since 1987); Director, Coca-Cola Enterprises
                                     (since 1987).
Landon Hilliard*...................  Director (since 1992); Partner, Brown Brothers Harriman
  Brown Brothers Harriman & Co.      & Co. (since January 1979); Director, Owens-Corning
  59 Wall Street                     Fiberglas Corporation (since April 1989).
  New York, NY 10005
E.B. Leisenring, Jr.*..............  Director (since 1982); Chairman of The Philadelphia
  The Philadelphia Contributionship  Contributionship (since January 1996); Chairman and
  One Tower Bridge, Suite 501        Chief Executive Officer, Penn Virginia Corporation (from
  West Conshohocken, PA 19428        December 1933 to April 1992); Director, Penn Virginia
                                     Corporation (from September 1952 to October 1992);
                                     Director, Westmoreland Coal Company (from September 1952
                                     to June 1996); Director, Fidelity Bank, N.A. (a wholly
                                     owned subsidiary of First Fidelity Bancorporation) (from
                                     1960 to January 1994); Director, PICO Products, Inc.
                                     (since November 1994); Director, SKF USA Inc. (a
                                     controlled subsidiary of Aktiebolaget SKF, a Swedish
                                     corporation) (from January 1966 to March 1996).
Arnold B. McKinnon*................  Director (since 1986); Chairman and Chief Executive
                                     Officer, Norfolk Southern Corporation (from September
                                     1991 to August 1992); Chairman, President and Chief
                                     Executive Officer, Norfolk Southern Corporation (from
                                     March 1987 to September 1991).
Jane Margaret O'Brien*.............  Director (since 1994); President, St. Mary's College of
  St. Mary's College of Maryland     Maryland (since July 1996); President, Hollins College
  St. Mary's City, MD 20686          (from July 1991 to June 1996); Dean of the Faculty,
                                     Middlebury College (from 1989 to 1991); Director,
                                     Landmark Communications, Inc. (since 1994).
Harold W. Pote*....................  Director (since 1988); Partner, The Beacon Group (since
  The Beacon Group                   April 1993); President, PBS Properties, Inc. (since
  399 Park Avenue                    November 1990), President and Chief Executive Officer,
  New York, NY 10022                 First Fidelity Bancorporation (from April 1984 to
                                     December 1988); Director, Turecamo Maritime, Inc. (from
                                     June 1990 to June 1996).
</TABLE>
 
                                       A-4
<PAGE>   24
 
     2. Directors and Executive Officers of AAC.  Set forth below is the name,
current business address, citizenship and the present principal occupation or
employment and material occupations, positions, offices or employments for the
past five years of each director and officer of AAC. Unless otherwise indicated,
each person identified below is employed by AAC and has held such position since
the formation of AAC on October 23, 1996. The principal address of AAC and,
unless otherwise indicated below, the current business address for each
individual listed below is Three Commercial Place, Norfolk, Virginia 23510.
Directors are identified by an asterisk. Each such person is a citizen of the
United States.
 
<TABLE>
<CAPTION>
             NAME AND PRINCIPAL                  PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT
              BUSINESS ADDRESS                        AND FIVE-YEAR EMPLOYMENT HISTORY
- --------------------------------------------    --------------------------------------------
<S>                                             <C>
David R. Goode*                                 President; see part 1 above for five-year
                                                employment history.
James C. Bishop, Jr.*                           Vice President and General Counsel; see part
                                                1 above for five-year employment history.
L.I. Prillman                                   Vice President; see part 1 above for
                                                five-year employment history.
Henry C. Wolf*                                  Vice President and Treasurer; see part 1
                                                above for five-year employment history.
Dezora M. Martin                                Corporate Secretary; see part 1 above for
                                                five-year employment history.
</TABLE>
 
                                       A-5
<PAGE>   25
 
                                                                      APPENDIX A
 
                     PENNSYLVANIA BUSINESS CORPORATION LAW
 
            TITLE 15.  CORPORATIONS AND UNINCORPORATED ASSOCIATIONS
                             PART II.  CORPORATIONS
                       SUBPART B.  BUSINESS CORPORATIONS
             ARTICLE C.  DOMESTIC BUSINESS CORPORATION ANCILLARIES
                      CHAPTER 25.  REGISTERED CORPORATIONS
                      SUBCHAPTER E.  CONTROL TRANSACTIONS
 
sec.2541.  APPLICATION AND EFFECT OF SUBCHAPTER
 
     (a) General rule. -- Except as otherwise provided in this section, this
subchapter shall apply to a registered corporation unless:
 
          (1) the registered corporation is one described in section 2502(1)(ii)
     or (2) (relating to registered corporation status);
 
          (2) the bylaws, by amendment adopted either: (i) by March 23, 1984; or
     (ii) on or after March 23, 1988, and on or before June 21, 1988; and, in
     either event, not subsequently rescinded by an article amendment,
     explicitly provide that this subchapter shall not be applicable to the
     corporation in the case of a corporation which on June 21, 1988, did not
     have outstanding one or more classes or series of preference shares
     entitled, upon the occurrence of a default in the payment of dividends or
     another similar contingency, to elect a majority of the members of the
     board of directors (a bylaw adopted on or before June 21, 1988, by a
     corporation excluded from the scope of this paragraph by the restriction of
     this paragraph relating to certain outstanding preference shares shall be
     ineffective unless ratified under paragraph (3));
 
          (3) the bylaws of which explicitly provide that this subchapter shall
     not be applicable to the corporation by amendment ratified by the board of
     directors on or after December 19, 1990, and on or before March 19, 1991,
     in the case of a corporation: (i) which on June 21, 1988, had outstanding
     one or more classes or series of preference shares entitled, upon the
     occurrence of a default in the payment of dividends or another similar
     contingency, to elect a majority of the members of the board of directors;
     and (ii) the bylaws of which on that date contained a provision described
     in paragraph (2); or
 
          (4) the articles explicitly provide that this subchapter shall not be
     applicable to the corporation by a provision included in the original
     articles, by an article amendment adopted prior to the date of the control
     transaction and prior to or on March 23, 1988, pursuant to the procedures
     then applicable to the corporation, or by an articles amendment adopted
     prior to the date of the control transaction and subsequent to March 23,
     1988, pursuant to both: (i) the procedures then applicable to the
     corporation; and (ii) unless such proposed amendment has been approved by
     the board of directors of the corporation, in which event this subparagraph
     shall not be applicable, the affirmative vote of the shareholders entitled
     to cast at least 80% of the votes which all shareholders are entitled to
     cast thereon. A reference in the articles or bylaws to former section 910
     (relating to right of shareholders to receive payment for shares following
     a control transaction) of the act of May 5, 1933 (P.L. 364, No. 106), known
     as the Business Corporation Law of 1933, shall be deemed a reference to
     this subchapter for the purposes of this section. See section 101(c)
     (relating to references to prior statutes).
 
     (b) Inadvertent transactions. -- This subchapter shall not apply to any
person or group that inadvertently becomes a controlling person or group if that
controlling person or group, as soon as practicable, divests itself of a
sufficient amount of its voting shares so that it is no longer a controlling
person or group.
 
     (c) Certain subsidiaries. -- This subchapter shall not apply to any
corporation that on December 23, 1983, was a subsidiary of any other
corporation.
 
                                       I-1
<PAGE>   26
 
sec.2542.  DEFINITIONS
 
     The following words and phrases when used in this subchapter shall have the
meanings given to them in this section unless the context clearly indicates
otherwise:
 
          "Control transaction."  The acquisition by a person or group of the
     status of a controlling person or group.
 
          "Controlling person or group."  A controlling person or group as
     defined in section 2543 (relating to controlling person or group).
 
          "Fair value."  A value not less than the highest price paid per share
     by the controlling person or group at any time during the 90-day period
     ending on and including the date of the control transaction plus an
     increment representing any value, including, without limitation, any
     proportion of any value payable for acquisition of control of the
     corporation, that may not be reflected in such price.
 
          "Partial payment amount."  The amount per share specified in section
     2545(c)(2) (relating to contents of notice).
 
          "Subsidiary."  Any corporation as to which any other corporation has
     or has the right to acquire, directly or indirectly, through the exercise
     of all warrants, options and rights and the conversion of all convertible
     securities, whether issued or granted by the subsidiary or otherwise,
     voting power over voting shares of the subsidiary that would entitle the
     holders thereof to cast in excess of 50% of the votes that all shareholders
     would be entitled to cast in the election of directors of such subsidiary,
     except that a subsidiary will not be deemed to cease being a subsidiary as
     long as such corporation remains a controlling person or group within the
     meaning of this subchapter.
 
          "Voting shares."  The term shall have the meaning specified in section
     2552 (relating to definitions).
 
sec.2543.  CONTROLLING PERSON OR GROUP
 
     (a)  General rule. -- For the purpose of this subchapter, a "controlling
person or group" means a person who has, or a group of persons acting in concert
that has, voting power over voting shares of the registered corporation that
would entitle the holders thereof to cast at least 20% of the votes that all
shareholders would be entitled to cast in an election of directors of the
corporation. (b) Exceptions generally.--Notwithstanding subsection (a):
 
          (1) A person or group which would otherwise be a controlling person or
     group within the meaning of this section shall not be deemed a controlling
     person or group unless, subsequent to the later of March 23, 1988, or the
     date this subchapter becomes applicable to a corporation by bylaw or
     article amendment or otherwise, that person or group increases the
     percentage of outstanding voting shares of the corporation over which it
     has voting power to in excess of the percentage of outstanding voting
     shares of the corporation over which that person or group had voting power
     on such later date, and to at least the amount specified in subsection (a),
     as the result of forming or enlarging a group or acquiring, by purchase,
     voting power over voting shares of the corporation.
 
          (2) No person or group shall be deemed to be a controlling person or
     group at any particular time if voting power over any of the following
     voting shares is required to be counted at such time in order to meet the
     20% minimum: (i) Shares which have been held continuously by a natural
     person since January 1, 1983, and which are held by such natural person at
     such time. (ii) Shares which are held at such time by any natural person or
     trust, estate, foundation or other similar entity to the extent the shares
     were acquired solely by gift, inheritance, bequest, devise or other
     testamentary distribution or series of these transactions, directly or
     indirectly, from a natural person who had acquired the shares prior to
     January 1, 1983. (iii) Shares which were acquired pursuant to a stock
     split, stock dividend, reclassification or similar recapitalization with
     respect to shares described under this paragraph that have been held
     continuously since their issuance by the corporation by the natural person
     or entity that acquired them from the corporation or that were acquired,
     directly or indirectly, from such natural person or entity, solely pursuant
     to a transaction or series of transactions described in subparagraph (ii),
     and that are held
 
                                       I-2
<PAGE>   27
 
     at such time by a natural person or entity described in subparagraph (ii).
     (iv) Control shares as defined in section 2562 (relating to definitions)
     which have not yet been accorded voting rights pursuant to section 2564(a)
     (relating to voting rights of shares acquired in a control-share
     acquisition). (v) Shares, the voting rights of which are attributable to a
     person under subsection (d) if: (A) the person acquired the option or
     conversion right directly from or made the contract, arrangement or
     understanding or has the relationship directly with the corporation; and
     (B) the person does not at the particular time own or otherwise effectively
     possess the voting rights of the shares. (vi) Shares acquired directly from
     the corporation or an affiliate or associate, as defined in section 2552
     (relating to definitions), of the corporation by a person engaged in
     business as an underwriter of securities who acquires the shares through
     his participation in good faith in a firm commitment underwriting
     registered under the Securities Act of 1933.
 
          (3) In determining whether a person or group is or would be a
     controlling person or group at any particular time, there shall be
     disregarded voting power arising from a contingent right of the holders of
     one or more classes or series of preference shares to elect one or more
     members of the board of directors upon or during the continuation of a
     default in the payment of dividends on such shares or another similar
     contingency.
 
     (c) Certain record holders. -- A person shall not be a controlling person
under subsection (a) if the person holds voting power, in good faith and not for
the purpose of circumventing this subchapter, as an agent, bank, broker, nominee
or trustee for one or more beneficial owners who do not individually or, if they
are a group acting in concert, as a group have the voting power specified in
subsection (a), or who are not deemed a controlling person or group under
subsection (b).
 
     (d) Existence of voting power. -- For the purposes of this subchapter, a
person has voting power over a voting share if the person has or shares,
directly or indirectly, through any option, contract, arrangement,
understanding, conversion right or relationship, or by acting jointly or in
concert or otherwise, the power to vote, or to direct the voting of, the voting
share.
 
sec.2544.  RIGHT OF SHAREHOLDERS TO RECEIVE PAYMENT FOR SHARES
 
     Any holder of voting shares of a registered corporation that becomes the
subject of a control transaction who shall object to the transaction shall be
entitled to the rights and remedies provided in this subchapter.
 
sec.2545.  NOTICE TO SHAREHOLDERS
 
     (a) General rule. -- Prompt notice that a control transaction has occurred
shall be given by the controlling person or group to: (1) Each shareholder of
record of the registered corporation holding voting shares. (2) The court,
accompanied by a petition to the court praying that the fair value of the voting
shares of the corporation be determined pursuant to section 2547 (relating to
valuation procedures) if the court should receive, pursuant to section 2547,
certificates from shareholders of the corporation or an equivalent request for
transfer of uncertificated securities.
 
     (b) Obligations of the corporation. -- If the controlling person or group
so requests, the corporation shall, at the option of the corporation and at the
expense of the person or group, either furnish a list of all such shareholders
to the person or group or mail the notice to all such shareholders.
 
     (c) Contents of notice. -- The notice shall state that: (1) All
shareholders are entitled to demand that they be paid the fair value of their
shares. (2) The minimum value the shareholder can receive under this subchapter
is the highest price paid per share by the controlling person or group within
the 90-day period ending on and including the date of the control transaction,
and stating that value. (3) If the shareholder believes the fair value of his
shares is higher, this subchapter provides an appraisal procedure for
determining the fair value of such shares, specifying the name of the court and
its address and the caption of the petition referenced in subsection (a)(2), and
stating that the information is provided for the possible use by the shareholder
in electing to proceed with a court-appointed appraiser under section 2547.
There shall be included in, or enclosed with, the notice a copy of this
subchapter.
 
                                       I-3
<PAGE>   28
 
     (d) Optional procedure. -- The controlling person or group may, at its
option, supply with the notice referenced in subsection (c) a form for the
shareholder to demand payment of the partial payment amount directly from the
controlling person or group without utilizing the court-appointed appraiser
procedure of section 2547, requiring the shareholder to state the number and
class or series, if any, of the shares owned by him, and stating where the
payment demand must be sent and the procedures to be followed.
 
sec.2546.  SHAREHOLDER DEMAND FOR FAIR VALUE
 
     (a) General rule. -- After the occurrence of the control transaction, any
holder of voting shares of the registered corporation may, prior to or within a
reasonable time after the notice required by section 2545 (relating to notice to
shareholders) is given, which time period may be specified in the notice, make
written demand on the controlling person or group for payment of the amount
provided in subsection (c) with respect to the voting shares of the corporation
held by the shareholder, and the controlling person or group shall be required
to pay that amount to the shareholder pursuant to the procedures specified in
section 2547 (relating to valuation procedures).
 
     (b) Contents of demand. -- The demand of the shareholder shall state the
number and class or series, if any, of the shares owned by him with respect to
which the demand is made.
 
     (c) Measure of value. -- A shareholder making written demand under this
section shall be entitled to receive cash for each of his shares in an amount
equal to the fair value of each voting share as of the date on which the control
transaction occurs, taking into account all relevant factors, including an
increment representing a proportion of any value payable for acquisition of
control of the corporation.
 
     (d) Purchases independent of subchapter. -- The provisions of this
subchapter shall not preclude a controlling person or group subject to this
subchapter from offering, whether in the notice required by section 2545 or
otherwise, to purchase voting shares of the corporation at a price other than
that provided in subsection (c), and the provisions of this subchapter shall not
preclude any shareholder from agreeing to sell his voting shares at that or any
other price to any person.
 
sec.2547.  VALUATION PROCEDURES
 
     (a) General rule. -- If, within 45 days (or such other time period, if any,
as required by applicable law) after the date of the notice required by section
2545 (relating to notice to shareholders), or, if such notice was not provided
prior to the date of the written demand by the shareholder under section 2546
(relating to shareholder demand for fair value), then within 45 days (or such
other time period, if any, required by applicable law) of the date of such
written demand, the controlling person or group and the shareholder are unable
to agree on the fair value of the shares or on a binding procedure to determine
the fair value of the shares, then each shareholder who is unable to agree on
both the fair value and on such a procedure with the controlling person or group
and who so desires to obtain the rights and remedies provided in this subchapter
shall, no later than 30 days after the expiration of the applicable 45-day or
other period, surrender to the court certificates representing any of the shares
that are certificated shares, duly endorsed for transfer to the controlling
person or group, or cause any uncertificated shares to be transferred to the
court as escrow agent under subsection (c) with a notice stating that the
certificates or uncertificated shares are being surrendered or transferred, as
the case may be, in connection with the petition referenced in section 2545 or,
if no petition has theretofore been filed, the shareholder may file a petition
within the 30-day period in the court praying that the fair value (as defined in
this subchapter) of the shares be determined.
 
     (b) Effect of failure to give notice and surrender certificates. -- Any
shareholder who does not so give notice and surrender any certificates or cause
uncertificated shares to be transferred within such time period shall have no
further right to receive, with respect to shares the certificates of which were
not so surrendered or the uncertificated shares which were not so transferred
under this section, payment under this subchapter from the controlling person or
group with respect to the control transaction giving rise to the rights of the
shareholder under this subchapter.
 
                                       I-4
<PAGE>   29
 
     (c) Escrow and notice. -- The court shall hold the certificates surrendered
and the uncertificated shares transferred to it in escrow for, and shall
promptly, following the expiration of the time period during which the
certificates may be surrendered and the uncertificated shares transferred,
provide a notice to the controlling person or group of the number of shares so
surrendered or transferred.
 
     (d) Partial payment for shares. -- The controlling person or group shall
then make a partial payment for the shares so surrendered or transferred to the
court, within ten business days of receipt of the notice from the court, at a
per-share price equal to the partial payment amount. The court shall then make
payment as soon as practicable, but in any event within ten business days, to
the shareholders who so surrender or transfer their shares to the court of the
appropriate per-share amount received from the controlling person or group.
 
     (e) Appointment of appraiser. -- Upon receipt of any share certificate
surrendered or uncertificated share transferred under this section, the court
shall, as soon as practicable but in any event within 30 days, appoint an
appraiser with experience in appraising share values of companies of like nature
to the registered corporation to determine the fair value of the shares.
 
     (f) Appraisal procedure. -- The appraiser so appointed by the court shall,
as soon as reasonably practicable, determine the fair value of the shares
subject to its appraisal and the appropriate market rate of interest on the
amount then owed by the controlling person or group to the holders of the
shares. The determination of any appraiser so appointed by the court shall be
final and binding on both the controlling person or group and all shareholders
who so surrendered their share certificates or transferred their shares to the
court, except that the determination of the appraiser shall be subject to review
to the extent and within the time provided or prescribed by law in the case of
other appointed judicial officers. See 42 Pa.C.S. ss 5105(a)(3) (relating to
right to appellate review) and 5571(b) (relating to appeals generally).
 
     (g) Supplemental payment. -- Any amount owed, together with interest, as
determined pursuant to the appraisal procedures of this section shall be payable
by the controlling person or group after it is so determined and upon and
concurrently with the delivery or transfer to the controlling person or group by
the court (which shall make delivery of the certificate or certificates
surrendered or the uncertificated shares transferred to it to the controlling
person or group as soon as practicable but in any event within ten business days
after the final determination of the amount owed) of the certificate or
certificates representing shares surrendered or the uncertificated shares
transferred to the court, and the court shall then make payment, as soon as
practicable but in any event within ten business days after receipt of payment
from the controlling person or group, to the shareholders who so surrendered or
transferred their shares to the court of the appropriate per-share amount
received from the controlling person or group.
 
     (h) Voting and dividend rights during appraisal
proceedings. -- Shareholders who surrender their shares to the court pursuant to
this section shall retain the right to vote their shares and receive dividends
or other distributions thereon until the court receives payment in full for each
of the shares so surrendered or transferred of the partial payment amount (and,
thereafter, the controlling person or group shall be entitled to vote such
shares and receive dividends or other distributions thereon). The fair value (as
determined by the appraiser) of any dividends or other distributions so received
by the shareholders shall be subtracted from any amount owing to such
shareholders under this section.
 
     (i) Powers of the court. -- The court may appoint such agents, including
the transfer agent of the corporation, or any other institution, to hold the
share certificates so surrendered and the shares surrendered or transferred
under this section, to effect any necessary change in record ownership of the
shares after the payment by the controlling person or group to the court of the
amount specified in subsection (h), to receive and disburse dividends or other
distributions, to provide notices to shareholders and to take such other actions
as the court determines are appropriate to effect the purposes of this
subchapter.
 
     (j) Costs and expenses. -- The costs and expenses of any appraiser or other
agents appointed by the court shall be assessed against the controlling person
or group. The costs and expenses of any other procedure to determine fair value
shall be paid as agreed to by the parties agreeing to the procedure.
 
                                       I-5
<PAGE>   30
 
     (k) Jurisdiction exclusive. -- The jurisdiction of the court under this
subchapter is plenary and exclusive and the controlling person or group, and all
shareholders who so surrendered or transferred their shares to the court shall
be made a party to the proceeding as in an action against their shares.
 
     (l) Duty of corporation. -- The corporation shall comply with requests for
information, which may be submitted pursuant to procedures maintaining the
confidentiality of the information, made by the court or the appraiser selected
by the court. If any of the shares of the corporation are not represented by
certificates, the transfer, escrow or retransfer of those shares contemplated by
this section shall be registered by the corporation, which shall give the
written notice required by section 1528(f) (relating to uncertificated shares)
to the transferring shareholder, the court and the controlling shareholder or
group, as appropriate in the circumstances.
 
     (m) Payment under optional procedure. -- Any amount agreed upon between the
parties or determined pursuant to the procedure agreed upon between the parties
shall be payable by the controlling person or group after it is agreed upon or
determined and upon and concurrently with the delivery of any certificate or
certificates representing such shares or the transfer of any uncertificated
shares to the controlling person or group by the shareholder.
 
     (n) Title to shares. -- Upon full payment by the controlling person or
group of the amount owed to the shareholder or to the court, as appropriate, the
shareholder shall cease to have any interest in the shares.
 
sec.2548.  COORDINATION WITH CONTROL TRANSACTION
 
     (a) General rule. -- A person or group that proposes to engage in a control
transaction may comply with the requirements of this subchapter in connection
with the control transaction, and the effectiveness of the rights afforded in
this subchapter to shareholders may be conditioned upon the consummation of the
control transaction.
 
     (b) Notice. -- The person or group shall give prompt written notice of the
satisfaction of any such condition to each shareholder who has made demand as
provided in this subchapter.
 
                                       I-6
<PAGE>   31
 
     Facsimile copies of the Letter of Transmittal, properly completed and duly
signed, will be accepted. The Letter of Transmittal, certificates for the Shares
and any other required documents should be sent by each shareholder of the
Company or such shareholder's broker, dealer, commercial bank, trust company or
other nominee to the Depositary at one of its addresses set forth below:
 
                    The Depositary for the Second Offer is:
 
                                 CITIBANK, N.A.
 
<TABLE>
<S>                             <C>                             <C>
           By Hand:                        By Mail:                 By Overnight Carrier:
        Citibank, N.A.                  Citibank, N.A.                  Citibank, N.A.
    Corporate Trust Window            c/o Citicorp Data               c/o Citicorp Data
  111 Wall Street, 5th Floor          Distribution, Inc.              Distribution, Inc.
   New York, New York 10043             P.O. Box 7072                  404 Sette Drive
                                  Paramus, New Jersey 07653       Paramus, New Jersey 07652
</TABLE>
 
              Facsimile for Eligible Institutions: (201) 262-3240
                      To confirm fax only: (800) 422-2077
 
     Any questions or requests for assistance or additional copies of the Offer
to Purchase, the First Supplement, the Second Supplement, this Third Supplement,
the Letter of Transmittal and the Notice of Guaranteed Delivery may be directed
to the Information Agent or the Dealer Managers at their respective telephone
numbers and locations listed below. You may also contact your broker, dealer,
commercial bank or trust company or other nominee for assistance concerning the
Second Offer.
 
                 The Information Agent for the Second Offer is:
                                 mackenzie logo
 
                                156 Fifth Avenue
                            New York, New York 10010
                         (212) 929-5500 (call collect)
                                       or
                         CALL TOLL FREE (800) 322-2885
 
                 The Dealer Managers for the Second Offer are:
 
<TABLE>
<S>                                    <C>                             <C>
  WASSERSTEIN PERELLA & CO., INC.           J.P. MORGAN & CO.                 MERRILL LYNCH & CO.
        31 West 52nd Street                   60 Wall Street                World Financial Center
     New York, New York 10019                 Mail Stop 2860                      North Tower
           Call Collect:                 New York, New York 10260        New York, New York 10281-1305
          (212) 969-2700                (800) 576-5070 (toll free)       (212) 449-8211 (call collect)
</TABLE>

<PAGE>   1
 
                             LETTER OF TRANSMITTAL
                              TO TENDER SHARES OF
                         COMMON STOCK AND SERIES A ESOP
                       CONVERTIBLE JUNIOR PREFERRED STOCK
     (including, in each case, the associated Common Stock Purchase Rights)
                                       OF
                                  CONRAIL INC.
                       PURSUANT TO THE OFFER TO PURCHASE
                            DATED DECEMBER 6, 1996,
                             THE SUPPLEMENT THERETO
                            DATED DECEMBER 19, 1996,
                         THE SECOND SUPPLEMENT THERETO
                              DATED MARCH 7, 1997,
                        AND THE THIRD SUPPLEMENT THERETO
                              DATED APRIL 10, 1997
                                       BY
 
                            GREEN ACQUISITION CORP.
                                CSX CORPORATION
                                      AND
                          NORFOLK SOUTHERN CORPORATION
 
THE SECOND OFFER HAS BEEN EXTENDED. THE SECOND OFFER AND WITHDRAWAL RIGHTS WILL
EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON FRIDAY, MAY 23, 1997, UNLESS THE
SECOND OFFER IS FURTHER EXTENDED.
 
                    The Depositary for the Second Offer is:
                                 CITIBANK, N.A.
 
<TABLE>
<S>                               <C>                               <C>
             By Hand:                          By Mail:                   By Overnight Carrier:
          Citibank, N.A.                    Citibank, N.A.                    Citibank, N.A.
      Corporate Trust Window       c/o Citicorp Data Distribution,   c/o Citicorp Data Distribution,
    111 Wall Street, 5th Floor                   Inc.                              Inc.
     New York, New York 10043               P.O. Box 7072                    404 Sette Drive
                                      Paramus, New Jersey 07653         Paramus, New Jersey 07652
</TABLE>
 
              Facsimile for Eligible Institutions: (201) 262-3240
                      To confirm fax only: (800) 422-2077
 
     DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET
FORTH ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE OR TELEX TRANSMISSION
OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY. YOU MUST
SIGN THIS LETTER OF TRANSMITTAL WHERE INDICATED BELOW AND COMPLETE THE
SUBSTITUTE FORM W-9 PROVIDED BELOW.
 
     THE INSTRUCTIONS ACCOMPANYING THIS LETTER OF TRANSMITTAL SHOULD BE READ
CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL IS COMPLETED.
 
     This Letter of Transmittal is to be completed by shareholders of Conrail
Inc. either if certificates ("Share Certificates") evidencing shares of common
stock, par value $1.00 per share (the "Common Shares"), or shares of Series A
ESOP Convertible Junior Preferred Stock, without par value (the "ESOP Preferred
Shares" and, together with the Common Shares, the "Shares"), are to be forwarded
herewith or if delivery of Shares is to be made by book-entry transfer to the
Depositary's account at The Depository Trust Company or the Philadelphia
Depository Trust Company (each, a "Book-Entry Transfer Facility" and
collectively, the "Book-Entry Transfer Facilities") pursuant to the book-entry
transfer procedures described in "Procedures for Tendering Shares" of the Offer
to Purchase (as defined below). Delivery of documents to a Book-Entry Transfer
Facility in accordance with such Book-Entry Transfer Facility's procedures does
not constitute delivery to the Depositary.
<PAGE>   2
 
     This revised Letter of Transmittal circulated with the Third Supplement (as
defined below), the Letter of Transmittal circulated with the Second Supplement
(as defined below), the First Supplement (as defined below) or the Letter of
Transmittal circulated with the Offer to Purchase is to be completed by
shareholders either if certificates evidencing Shares (as defined below) are to
be forwarded herewith or if delivery of Shares is to be made by book-entry
transfer to the Depositary's account at The Depository Trust Company or the
Philadelphia Depository Trust Company (each a "Book-Entry Transfer Facility" and
collectively, the "Book-Entry Transfer Facilities") pursuant to the book-entry
transfer procedures described in Section 3 of the Offer to Purchase (as defined
below). DELIVERY OF DOCUMENTS TO A BOOK-ENTRY TRANSFER FACILITY DOES NOT
CONSTITUTE DELIVERY TO THE DEPOSITORY.
 
     Holders of Shares will be required to tender one Right (as defined below)
for each Share tendered to effect a valid tender of such Share. Until the
Distribution Date (as defined in the Offer to Purchase) occurs, the Rights are
represented by and transferred with the Shares. Accordingly, if the Distribution
Date does not occur prior to the Expiration Date (as defined in the Third
Supplement), a tender of Shares will constitute a tender of the associated
Rights. If a Distribution Date has occurred, certificates representing a number
of Rights equal to the number of Shares being tendered must be delivered to the
Depositary in order for such Shares to be validly tendered. If a Distribution
Date has occurred, a tender of Shares without Rights constitutes an agreement by
the tendering shareholder to deliver certificates representing a number of
Rights equal to the number of Shares tendered pursuant to the Second Offer (as
defined below) to the Depositary within three New York Stock Exchange, Inc.
trading days after the date such certificates are distributed. Purchaser (as
defined below) reserves the right to require that it receive such certificates
prior to accepting Shares for payment. Payment for Shares tendered and purchased
pursuant to the Second Offer will be made only after timely receipt by the
Depositary of, among other things, such certificates, if such certificates have
been distributed to holders of Shares. Purchaser will not pay any additional
consideration for the Rights tendered pursuant to the Second Offer.
 
     Shareholders whose Share Certificates are not immediately available or who
cannot deliver their Share Certificates and all other documents required hereby
to the Depositary prior to the Expiration Date or who cannot complete the
procedures for delivery by book-entry transfer on a timely basis and who wish to
tender their Shares must do so pursuant to the guaranteed delivery procedure
described in "Procedures for Tendering Shares" of the Offer to Purchase. See
Instruction 2.
 
[ ] CHECK HERE IF SHARES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER TO THE
    DEPOSITARY'S ACCOUNT AT ONE OF THE BOOK-ENTRY TRANSFER FACILITIES AND
    COMPLETE THE FOLLOWING:
 
    Name of Tendering Institution:______________________________________________
 
    Check Box of Applicable Book-Entry Transfer Facility:
 
    [ ] The Depository Trust Company
    [ ] Philadelphia Depository Trust Company
 
    Account Number ____________     Transaction Code Number___________________
 
[ ] CHECK HERE IF SHARES ARE BEING TENDERED PURSUANT TO A NOTICE OF GUARANTEED
    DELIVERY PREVIOUSLY SENT TO THE DEPOSITARY AND COMPLETE THE FOLLOWING:
 
    Name(s) of Registered Holder(s):__________________________________________
 
    Window Ticket No. (if any):_______________________________________________
 
    Date of Execution of Notice of Guaranteed Delivery:_______________________
 
    Name of Institution which Guaranteed Delivery:____________________________
 
    If Delivered by Book-Entry Transfer, Check Box of Book-Entry Transfer
    Facility:
 
    [ ]  The Depository Trust Company
    [ ]  Philadelphia Depository Trust Company
 
    Account Number ____________     Transaction Code Number__________________
<PAGE>   3
<TABLE>
<CAPTION>
<S>                                            <C>              <C>              <C>
                                  DESCRIPTION OF SHARES TENDERED
 
<CAPTION>
                         NAME(S) AND ADDRESS(ES) OF REGISTERED HOLDER(S)
                                    (PLEASE FILL IN, IF BLANK)
<S>                                            <C>              <C>              <C>
 
</TABLE>
<TABLE>
<CAPTION>
 
<S>                             <C>                             <C>
                                 SHARE CERTIFICATE(S) TENDERED
                             (ATTACH ADDITIONAL LIST IF NECESSARY)
 
<CAPTION>
                                     TOTAL NUMBER OF SHARES             NUMBER OF SHARES
     CERTIFICATE NUMBER(S)*      REPRESENTED BY CERTIFICATE(S)             TENDERED**
<S>                             <C>                             <C>
          TOTAL SHARES
 
 * Need not be completed by shareholders tendering by book-entry transfer.
** Unless otherwise indicated, it will be assumed that all Shares being delivered to the
   Depositary are being tendered. See Instruction 4.
</TABLE>
 
                    NOTE: SIGNATURES MUST BE PROVIDED BELOW.
                 PLEASE READ THE INSTRUCTIONS SET FORTH IN THIS
                        LETTER OF TRANSMITTAL CAREFULLY.
<PAGE>   4
 
Ladies and Gentlemen:
 
     The undersigned hereby tenders to Green Acquisition Corp., a Pennsylvania
corporation ("Purchaser") the above-described shares of common stock, par value
$1.00 per share (the "Common Shares"), or shares of Series A ESOP Convertible
Junior Preferred Stock, without par value (the "ESOP Preferred Shares" and,
together with the Common Shares, the "Shares"), of Conrail Inc., a Pennsylvania
corporation (the "Company"), including, in each case, the associated common
stock purchase rights (the "Rights") issued pursuant to the Rights Agreement,
dated as of July 19, 1989, between the Company and First Chicago Trust Company
of New York, as Rights Agent (as amended, the "Rights Agreement"), pursuant to
Purchaser's offer to purchase all Shares, including, in each case, the
associated Rights, at a price of $115 per Share, net to the seller in cash, upon
the terms and subject to the conditions set forth in the Offer to Purchase,
dated December 6, 1996 (the "Offer to Purchase"), as amended and supplemented by
the Supplement thereto, dated December 19, 1996 (the "First Supplement"), the
Second Supplement thereto, dated March 7, 1997 (the "Second Supplement"), and
the Third Supplement thereto, dated April 10, 1997 (the "Third Supplement"),
receipt of which is hereby acknowledged, and in the related Letters of
Transmittal (which, as amended from time to time, together constitute the
"Second Offer"). All references herein to Common Shares, ESOP Preferred Shares
or Shares includes the associated Rights.
 
     The undersigned understands that Purchaser reserves the right to transfer
or assign, in whole at any time, or in part from time to time, to one or more of
its affiliates, the right to purchase all or any portion of the Shares tendered
pursuant to the Second Offer, but any such transfer or assignment will not
relieve Purchaser of its obligations under the Second Offer and will in no way
prejudice the rights of tendering shareholders to receive payment for Shares
validly tendered and accepted for payment pursuant to the Second Offer.
 
     Subject to, and effective upon, acceptance for payment of the Shares
tendered herewith, in accordance with the terms of the Second Offer (including,
if the Second Offer is further extended or amended, the terms and conditions of
any such extension or amendment), the undersigned hereby sells, assigns and
transfers to, or upon the order of, Purchaser all right, title and interest in
and to all the Shares that are being tendered hereby (and any and all non-cash
dividends, distributions, rights, other Shares or other securities issued or
issuable in respect of such Shares or declared, paid or distributed in respect
of such Shares on or after December 6, 1996 and any cash dividends and other
distributions declared on or after April 8, 1997 and payable to holders of
Shares of record on a date on or prior to May 30, 1997 (collectively,
"Distributions")), and irrevocably appoints the Depositary the true and lawful
agent and attorney-in-fact of the undersigned with respect to such Shares and
all Distributions, with full power of substitution (such power of attorney being
deemed to be an irrevocable power coupled with an interest), to (i) deliver
certificates for such Shares (individually, a "Share Certificate") and all
Distributions, or transfer ownership of such Shares and all Distributions on the
account books maintained by a Book-Entry Transfer Facility, together, in either
case, with all accompanying evidence of transfer and authenticity to, or upon
the order of Purchaser, (ii) present such Shares and all Distributions for
transfer on the books of the Company and (iii) receive all benefits and
otherwise exercise all rights of beneficial ownership of such Shares and all
Distributions, all in accordance with the terms of the Second Offer.
 
     If, on or after December 6, 1996, the Company should declare or pay (x) any
cash or stock dividend, other than regular quarterly cash dividends, or make any
distribution with respect to the Shares that is payable or distributable to
stockholders of record on a date prior to the transfer to the name of Purchaser
or its nominee or transferee on the Company's stock transfer records of the
Shares accepted for payment pursuant to the Second Offer or (y) any cash
dividend or other distribution with respect to the Shares, including regular
quarterly cash dividends, that is payable to stockholders of record on a date on
or prior to May 30, 1997, then, subject to the provisions of Section 14 of the
Offer to Purchase and Section 9 of the Third Supplement, any such dividend,
distribution or right to be received by the tendering shareholder will be
received and held by such tendering shareholder for the account of Purchaser and
will be required to be promptly remitted and transferred by each such tendering
shareholder to the Depositary for the account of Purchaser, accompanied by
appropriate documentation of transfer or, in lieu of such receipt, in the case
of any cash dividend or distribution, the purchase price per Share payable by
Purchaser pursuant to the Second Offer will be reduced by the amount of any such
cash dividend or distribution. If, on or after the date of the Fourth Amendment
(as defined in the Third Supplement), the Company's Board of Directors should
declare or the Company should pay then, subject to the provisions of Section 14
of the Offer to Purchase and Section [9] of the Third Supplement, the purchase
price per Share payable by Purchaser pursuant to the Second Offer may be reduced
by the amount of any such cash dividend or other distribution in lieu of such
cash dividend or other distribution to be received by the tendering shareholder
being received and held by such tendering shareholder for the account of
Purchaser and being required to be promptly remitted and transferred by each
such tendering shareholder to the Depositary for the account of Purchaser,
accompanied by appropriate documentation of transfer. Pending such remittance,
Purchaser will be entitled to all rights and privileges as owner of any such
non-cash dividend, distribution or right and may withhold the entire purchase
price or deduct from the purchase price the amount of value thereof, as
determined by Purchaser in its sole discretion.
<PAGE>   5
 
     By executing this Letter of Transmittal, the undersigned irrevocably
appoints John W. Snow, Mark G. Aron and Alan A. Rudnick as proxies of the
undersigned, each with full power of substitution, to the full extent of the
undersigned's rights with respect to the Shares tendered by the undersigned and
accepted for payment by Purchaser (and any and all Distributions). All such
proxies shall be considered coupled with an interest in the tendered Shares.
This appointment will be effective if, when, and only to the extent that,
Purchaser accepts such Shares for payment pursuant to the Second Offer. Upon
such acceptance for payment, all prior proxies given by the undersigned with
respect to such Shares, Distributions and other securities will, without further
action, be revoked, and no subsequent proxies may be given. The individuals
named above as proxies will, with respect to the Shares, Distributions and other
securities for which the appointment is effective, be empowered (subject to the
terms of the Voting Trust Agreement (as defined in the Offer to Purchase), the
Amended Voting Trust Agreement (as defined in the Second Supplement), or the
CSX/NSC Voting Trust Agreement (as defined in the Third Supplement), as
applicable, so long as it shall be in effect with respect to the Shares) to
exercise all voting and other rights of the undersigned as they in their sole
discretion may deem proper at any annual, special, adjourned or postponed
meeting of the Company's shareholders, by written consent or otherwise, and
Purchaser reserves the right to require that, in order for Shares, Distributions
or other securities to be deemed validly tendered, immediately upon Purchaser's
acceptance for payment of such Share, Purchaser must be able to exercise full
voting rights with respect to such Shares.
 
     The undersigned hereby represents and warrants that the undersigned has
full power and authority to tender, sell, assign and transfer the Shares
tendered hereby and all Distributions, that the undersigned own(s) the Shares
tendered hereby and that when such Shares are accepted for payment by Purchaser,
Purchaser will acquire good, marketable and unencumbered title thereto and to
all Distributions, free and clear of all liens, restrictions, charges and
encumbrances, and that none of such Shares and Distributions will be subject to
any adverse claim. The undersigned, upon request, shall execute and deliver all
additional documents deemed by the Depositary or Purchaser to be necessary or
desirable to complete the sale, assignment and transfer of the Shares tendered
hereby and all Distributions. In addition, the undersigned shall remit and
transfer promptly to the Depositary for the account of Purchaser all
Distributions in respect of the Shares tendered hereby, accompanied by
appropriate documentation of transfer, and, pending such remittance and transfer
or appropriate assurance thereof, Purchaser shall be entitled to all rights and
privileges as owner of each such Distribution and may withhold the entire
purchase price of the Shares tendered hereby or deduct from such purchase price,
the amount or value of such Distribution as determined by Purchaser in its sole
discretion.
 
     No authority herein conferred or agreed to be conferred shall be affected
by, and all such authority shall survive, the death or incapacity of the
undersigned. All obligations of the undersigned hereunder shall be binding upon
the heirs, personal representatives, successors and assigns of the undersigned.
Except as stated in the Offer to Purchase, the First Supplement, the Second
Supplement or the Third Supplement this tender is irrevocable.
 
     The undersigned understands that tenders of Shares pursuant to any one of
the procedures described in "Procedures for Tendering Shares" of the Offer to
Purchase and in the Instructions hereto will constitute the undersigned's
acceptance of the terms and conditions of the Second Offer. Purchaser's
acceptance for payment of Shares tendered pursuant to the Second Offer will
constitute a binding agreement between the undersigned and Purchaser upon the
terms and subject to the conditions of the Second Offer. The undersigned
recognizes that under certain circumstances set forth in the Offer to Purchase,
the First Supplement, the Second Supplement or the Third Supplement Purchaser
may not be required to accept for payment any of the Shares tendered hereby.
 
     Unless otherwise indicated herein in the box entitled "Special Payment
Instructions," please issue the check for the purchase price of all Shares
purchased, and return all Share Certificates evidencing Shares not purchased or
not tendered, in the name(s) of the registered holder(s) appearing above under
"Description of Shares Tendered." Similarly, unless otherwise indicated in the
box entitled "Special Delivery Instructions," please mail the check for the
purchase price of all Shares purchased and all Share Certificates evidencing
Shares not tendered or not purchased (and accompanying documents, as
appropriate) to the address(es) of the registered holder(s) appearing above
under "Description of Shares Tendered." In the event that the boxes entitled
"Special Payment Instructions" and "Special Delivery Instructions" are both
completed, please issue the check for the purchase price of all Shares purchased
and return all Share Certificates evidencing Shares not purchased or not
tendered in the name(s) of, and mail such check and Share Certificates to, the
person(s) so indicated. Unless otherwise indicated herein in the box entitled
"Special Payment Instructions," please credit any Shares tendered hereby and
delivered by book-entry transfer, but which are not purchased, by crediting the
account at the Book-Entry Transfer Facility designated above. The undersigned
recognizes that Purchaser has no obligation, pursuant to the Special Payment
Instructions, to transfer any Shares from the name of the registered holder(s)
thereof if Purchaser does not accept for payment any of the Shares tendered
hereby.
<PAGE>   6
 
                          SPECIAL PAYMENT INSTRUCTIONS
                       (SEE INSTRUCTIONS 1, 5, 6 AND 7 OF
                          THIS LETTER OF TRANSMITTAL)
 
     To be completed ONLY if certificates for Shares not tendered or not
purchased and/or the check for the purchase price of Shares purchased are to be
issued in the name of someone other than the undersigned, or if Shares delivered
by book-entry transfer which are not purchased are to be returned by credit to
an account maintained at a Book-Entry Transfer Facility other than that
designated above.
 
Issue check and/or certificates to:
 
Name
     -------------------------------------------------
                       (PLEASE PRINT)
 
Address
       -----------------------------------------------

 
- ------------------------------------------------------
                         (ZIP CODE)
 
- ------------------------------------------------------
  (TAXPAYER IDENTIFICATION OR SOCIAL SECURITY NUMBER)
 
(ALSO COMPLETE SUBSTITUTE FORM W-9 BELOW)
 
[ ] Credit unpurchased Shares delivered by book-entry transfer to the Book-Entry
    Transfer Facility account set forth below:
 
Check appropriate box:
 
[ ] The Depository Trust Company
[ ] Philadelphia Depository Trust Company
 
- ------------------------------------------------------
                    (ACCOUNT NUMBER)
 
                         SPECIAL DELIVERY INSTRUCTIONS
                        (SEE INSTRUCTIONS 1, 5, 6 AND 7
                         OF THIS LETTER OF TRANSMITTAL)
 
     To be completed ONLY if certificates for Shares not tendered or not
purchased and/or the check for the purchase price of Shares purchased are to be
sent to someone other than the undersigned, or to the undersigned at an address
other than that shown above.
 
Mail check and/or certificates to:
 
Name
     -------------------------------------------------
                     (PLEASE PRINT)
 
Address
       -----------------------------------------------


- ------------------------------------------------------
                       (ZIP CODE)
<PAGE>   7
 
                                   SIGN HERE
                   (COMPLETE SUBSTITUTE FORM W-9 ON REVERSE)
 
X
- --------------------------------------------------------------------------------
 
X
- --------------------------------------------------------------------------------
                          (SIGNATURE(S) OF HOLDER(S))
 
Date                          , 1997
 
(Must be signed by registered holder(s) exactly as name(s) appear(s) on common
or preferred stock certificate(s) or on a security position listing or by
person(s) authorized to become registered holder(s) by certificates and
documents transmitted herewith. If signature is by trustees, executors,
administrators, guardians, attorneys-in-fact, officers of corporations or others
acting in a fiduciary or representative capacity, please provide the following
information. See Instruction 5 of this Letter of Transmittal.)
 
Name(s)
       -------------------------------------------------------------------------
                                 (PLEASE PRINT)
Capacity (Full Title)
                     -----------------------------------------------------------
Address 
       -------------------------------------------------------------------------
                               (INCLUDE ZIP CODE)
Area Code and Telephone Number
                               -------------------------------------------------
Tax Identification or Social Security No.
                                       -----------------------------------------
                                       (COMPLETE SUBSTITUTE FORM W-9 ON REVERSE)
 
                           GUARANTEE OF SIGNATURE(S)
            (SEE INSTRUCTIONS 1 AND 5 OF THIS LETTER OF TRANSMITTAL)
Authorized Signature
                    ------------------------------------------------------------

Name
    ----------------------------------------------------------------------------
                                 (PLEASE PRINT)
Title
     ---------------------------------------------------------------------------
Name of Firm
            --------------------------------------------------------------------
Address
       -------------------------------------------------------------------------
                               (INCLUDE ZIP CODE)
Area Code and Telephone Number
                              --------------------------------------------------
Date                          , 1997
<PAGE>   8
 
                                  INSTRUCTIONS
 
             FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER
 
     1. Guarantee of Signatures. Except as otherwise provided below, all
signatures on this Letter of Transmittal must be guaranteed by a firm which is a
bank, broker, dealer, credit union, savings association, or other entity that is
a member in good standing of the Securities Transfer Agent's Medallion Program
(each, an "Eligible Institution"). No signature guarantee is required on this
Letter of Transmittal (a) if this Letter of Transmittal is signed by the
registered holder(s) (which term, for purposes of this document, shall include
any participant in a Book-Entry Transfer Facility whose name appears on a
security position listing as the owner of Shares) of Shares tendered herewith,
unless such holder(s) has completed either the box entitled "Special Delivery
Instructions" or the box entitled "Special Payment Instructions" on the reverse
hereof, or (b) if such Shares are tendered for the account of an Eligible
Institution. See Instruction 5. If a Share Certificate is registered in the name
of a person other than the signer of this Letter of Transmittal, or if payment
is to be made, or a Share Certificate not accepted for payment or not tendered
is to be returned, to a person other than the registered holder(s), then the
Share Certificate must be endorsed or accompanied by appropriate stock powers,
in either case signed exactly as the name(s) of the registered holder(s)
appear(s) on the Share Certificate, with the signature(s) on such Share
Certificate or stock powers guaranteed as described above. See Instruction 5.
 
     2. Delivery of Letter of Transmittal and Share Certificates. This Letter of
Transmittal is to be used either if Share Certificates are to be forwarded
herewith or if Shares are to be delivered by book-entry transfer pursuant to the
procedures set forth in "Procedures for Tendering Shares" of the Offer to
Purchase. Share Certificates evidencing all tendered Shares, or confirmation of
a book-entry transfer of such Shares, if such procedure is available, into the
Depositary's account at one of the Book-Entry Transfer Facilities pursuant to
the procedures set forth in "Procedures for Tendering Shares" of the Offer to
Purchase, together with a properly completed and duly executed Letter of
Transmittal (or facsimile thereof) with any required signature guarantees (or,
in the case of a book-entry transfer, an Agent's Message, as defined below) and
any other documents required by this Letter of Transmittal, must be received by
the Depositary at one of its addresses set forth on the reverse hereof prior to
the Expiration Date (as defined in "Amended Terms of the Second Offer;
Expiration Date" of the Third Supplement). If Share Certificates are forwarded
to the Depositary in multiple deliveries, a properly completed and duly executed
Letter of Transmittal must accompany each such delivery. Stockholders whose
Share Certificates are not immediately available, who cannot deliver their Share
Certificates and all other required documents to the Depositary prior to the
Expiration Date or who cannot complete the procedure for delivery by book-entry
transfer on a timely basis may tender their Shares pursuant to the guaranteed
delivery procedure described in "Procedures for Tendering Shares" of the Offer
to Purchase. Pursuant to such procedure: (i) such tender must be made by or
through an Eligible Institution; (ii) a properly completed and duly executed
Notice of Guaranteed Delivery, substantially in the form provided by Purchaser
herewith, must be received by the Depositary prior to the Expiration Date; and
(iii) in the case of a guarantee of Shares, the Share Certificates, in proper
form for transfer, or a confirmation of a book-entry transfer of such Shares, if
such procedure is available, into the Depositary's account at one of the
Book-Entry Transfer Facilities, together with a properly completed and duly
executed Letter of Transmittal (or manually signed facsimile thereof) with any
required signature guarantees (or, in the case of a book-entry transfer, an
Agent's Message), and any other documents required by this Letter of
Transmittal, must be received by the Depositary within three New York Stock
Exchange, Inc. trading days after the date of execution of the Notice of
Guaranteed Delivery, all as described in "Procedures for Tendering Shares" of
the Offer to Purchase. The term "Agent's Message" means a message, transmitted
by a Book-Entry Transfer Facility to, and received by the Depositary and forming
a part of a Book-Entry Confirmation, which states that such Book-Entry Transfer
Facility has received an express acknowledgment from the participant in such
Book-Entry Transfer Facility tendering the Shares, that such participant has
received and agrees to be bound by the terms of this Letter of Transmittal and
that the Purchaser may enforce such agreement against the participant.
 
     THE METHOD OF DELIVERY OF THIS LETTER OF TRANSMITTAL, SHARE CERTIFICATES
AND ALL OTHER REQUIRED DOCUMENTS, INCLUDING DELIVERY THROUGH ANY BOOK-ENTRY
TRANSFER FACILITY, IS AT THE OPTION AND RISK OF THE TENDERING SHAREHOLDER, AND
THE DELIVERY WILL BE DEEMED MADE ONLY WHEN ACTUALLY RECEIVED BY THE DEPOSITARY.
IF DELIVERY IS BY MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY
INSURED, IS RECOMMENDED. IN ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO
ENSURE TIMELY DELIVERY.
 
     No alternative, conditional or contingent tenders will be accepted and no
fractional Shares will be purchased. By execution of this Letter of Transmittal
(or a facsimile hereof), all tendering stockholders waive any right to receive
any notice of the acceptance of their Shares for payment.
 
     3. Inadequate Space. If the space provided herein under "Description of
Shares Tendered" is inadequate, the Share Certificate numbers, the number of
Shares evidenced by such Share Certificates and the number of Shares tendered
should be listed on a separate schedule and attached hereto.
<PAGE>   9
 
     4. Partial Tenders. (Not applicable to stockholders who tender by
book-entry transfer.) If fewer than all the Shares evidenced by any Share
Certificate delivered to the Depositary herewith are to be tendered hereby, fill
in the number of Shares which are to be tendered in the box entitled "Number of
Shares Tendered." In such cases, new Share Certificate(s) evidencing the
remainder of the Shares that were evidenced by the Share Certificates delivered
to the Depositary herewith will be sent to the person(s) signing this Letter of
Transmittal, unless otherwise provided in the box entitled "Special Delivery
Instructions," as soon as practicable after the expiration or termination of the
Second Offer. All Shares evidenced by Share Certificates delivered to the
Depositary will be deemed to have been tendered unless otherwise indicated.
 
     5. Signatures on Letter of Transmittal; Stock Powers and Endorsements. If
this Letter of Transmittal is signed by the registered holder(s) of the Shares
tendered hereby, the signature(s) must correspond with the name(s) as written on
the face of the Share Certificates evidencing such Shares without alteration,
enlargement or any other change whatsoever.
 
     If any Share tendered hereby is owned of record by two or more persons, all
such persons must sign this Letter of Transmittal. If any of the Shares tendered
hereby are registered in the names of different holders, it will be necessary to
complete, sign and submit as many separate Letters of Transmittal as there are
different registrations of such certificates.
 
     If this Letter of Transmittal is signed by the registered holder(s) of the
Shares tendered hereby, no endorsements of Share Certificates or separate stock
powers are required, unless payment is to be made to, or Share Certificates
evidencing Shares not tendered or not purchased are to be issued in the name of,
a person other than the registered holder(s), in which case, the Share
Certificate(s) evidencing the Shares tendered hereby must be endorsed or
accompanied by appropriate stock powers, in either case signed exactly as the
name(s) of the registered holder(s) appear(s) on such Share Certificate(s).
Signatures on such Share Certificate(s) and stock powers must be guaranteed by
an Eligible Institution.
 
     If this Letter of Transmittal is signed by a person other than the
registered holder(s) of the Shares tendered hereby, the Share Certificate(s)
evidencing the Shares tendered hereby must be endorsed or accompanied by
appropriate stock powers, in either case signed exactly as the name(s) of the
registered holder(s) appear(s) on such Share Certificate(s). Signatures on such
Share Certificate(s) and stock powers must be guaranteed by an Eligible
Institution.
 
     If this Letter of Transmittal or any Share Certificate(s) or stock power is
signed by a trustee, executor, administrator, guardian, attorney-in-fact,
officer of a corporation or other person acting in a fiduciary or representative
capacity, such person should so indicate when signing, and proper evidence
satisfactory to Purchaser of such person's authority so to act must be
submitted.
 
     6. Stock Transfer Taxes. Except as otherwise provided in this Instruction
6, Purchaser will pay all stock transfer taxes with respect to the sale and
transfer of any Shares to it or its order pursuant to the Second Offer. If,
however, payment of the purchase price of any Shares purchased is to be made to,
or Share Certificate(s) evidencing Shares not tendered or not purchased are to
be issued in the name of, a person other than the registered holder(s), the
amount of any stock transfer taxes (whether imposed on the registered holder(s),
such other person or otherwise) payable on account of the transfer to such other
person will be deducted from the purchase price of such Shares purchased, unless
evidence satisfactory to Purchaser of the payment of such taxes, or exemption
therefrom, is submitted.
 
     EXCEPT AS PROVIDED IN THIS INSTRUCTION 6, IT WILL NOT BE NECESSARY FOR
TRANSFER TAX STAMPS TO BE AFFIXED TO THE SHARE CERTIFICATE(S) EVIDENCING THE
SHARES TENDERED HEREBY.
 
     7. Special Payment and Delivery Instructions. If a check for the purchase
price of any Shares tendered hereby is to be issued, or Share Certificate(s)
evidencing Shares not tendered or not purchased are to be issued, in the name of
a person other than the person(s) signing this Letter of Transmittal or if such
check or any such Share Certificate is to be sent to someone other than the
person(s) signing this Letter of Transmittal or to the person(s) signing this
Letter of Transmittal, but at an address other than that shown in the box
entitled "Description of Shares Tendered," the appropriate boxes on this Letter
of Transmittal must be completed. Shares tendered hereby by book-entry transfer
may request that Shares not purchased be credited to such account maintained at
a Book-Entry Transfer Facility as such stockholder may designate in the box
entitled "Special Payment Instructions" on the reverse hereof. If no such
instructions are given, all such Shares not purchased will be returned by
crediting the account at the Book-Entry Transfer Facility designated on the
reverse hereof as the account from which such Shares were delivered.
 
     8. Requests for Assistance or Additional Copies. Requests for assistance
may be directed to the Information Agent or Dealer Managers at their respective
addresses or telephone numbers set forth below. Additional copies of the Offer
to Purchase, the First Supplement, the Second Supplement, the Third Supplement,
this Letter of Transmittal, the Notice of Guaranteed Delivery and the Guidelines
for Certification of Taxpayer Identification Number on Substitute Form W-9 may
be obtained from the Information Agent or the Dealer Managers or from brokers,
dealers, commercial banks or trust companies.
<PAGE>   10
 
     9. Substitute Form W-9. Each tendering shareholder is required to provide
the Depositary with a correct Taxpayer Identification Number ("TIN") on the
Substitute Form W-9 which is provided under "Important Tax Information" below,
and to certify, under penalties of perjury, that such number is correct and that
such shareholder is not subject to backup withholding of federal income tax. If
a tendering shareholder has been notified by the Internal Revenue Service that
such shareholder is subject to backup withholding, such shareholder must cross
out item (2) of the Certification box of the Substitute Form W-9, unless such
shareholder has since been notified by the Internal Revenue Service that such
shareholder is no longer subject to backup withholding. Failure to provide the
information on the Substitute Form W-9 may subject the tendering shareholder to
31% federal income tax withholding on the payment of the purchase price of all
Shares purchased from such shareholder. If the tendering shareholder has not
been issued a TIN and has applied for one or intends to apply for one in the
near future, such shareholder should write "Applied For" in the space provided
for the TIN in Part I of the Substitute Form W-9, and sign and date the
Substitute Form W-9. If "Applied For" is written in Part I and the Depositary is
not provided with a TIN within 60 days, the Depositary will withhold 31% on all
payments of the purchase price to such stockholder until a TIN is provided to
the Depositary.
 
     10. Lost, Destroyed or Stolen Certificates. If any certificate(s)
representing Shares has been lost, destroyed or stolen, the shareholder should
promptly notify the Depositary. The shareholder will then be instructed as to
the steps that must be taken in order to replace the certificate(s). This Letter
of Transmittal and related documents cannot be processed until the procedures
for replacing lost or destroyed certificates have been followed.
 
     IMPORTANT:  THIS LETTER OF TRANSMITTAL (OR FACSIMILE HEREOF), PROPERLY
COMPLETED AND DULY EXECUTED, WITH ANY REQUIRED SIGNATURE GUARANTEES, OR AN
AGENT'S MESSAGE (TOGETHER WITH SHARE CERTIFICATES OR CONFIRMATION OF BOOK-ENTRY
TRANSFER AND ALL OTHER REQUIRED DOCUMENTS) OR A PROPERLY COMPLETED AND DULY
EXECUTED NOTICE OF GUARANTEED DELIVERY MUST BE RECEIVED BY THE DEPOSITARY PRIOR
TO THE EXPIRATION DATE (AS DEFINED IN THE THIRD SUPPLEMENT).
 
                           IMPORTANT TAX INFORMATION
 
     Under the federal income tax law, a shareholder whose tendered Shares are
accepted for payment is required by law to provide the Depositary (as payer)
with such shareholder's correct TIN on Substitute Form W-9 below. If such
shareholder is an individual, the TIN is such shareholder's social security
number. If the Depositary is not provided with the correct TIN, the shareholder
may be subject to a $50 penalty imposed by the Internal Revenue Service. In
addition, payments that are made to such shareholder with respect to Shares and
Rights purchased pursuant to the Second Offer may be subject to backup
withholding of 31%.
 
     Certain shareholders (including, among others, all corporations and certain
foreign individuals) are not subject to these backup withholding and reporting
requirements. In order for a foreign individual to qualify as an exempt
recipient, such individual must submit a statement, signed under penalties of
perjury, attesting to such individual's exempt status. Forms of such statements
can be obtained from the Depositary. See the enclosed Guidelines for
Certification of Taxpayer Identification Number on Substitute Form W-9 for
additional instructions.
 
     If backup withholding applies with respect to a shareholder, the Depositary
is required to withhold 31% of any payments made to such shareholder. Backup
withholding is not an additional tax. Rather, the tax liability of persons
subject to backup withholding will be reduced by the amount of tax withheld. If
withholding results in an overpayment of taxes, a refund may be obtained from
the Internal Revenue Service.
 
PURPOSE OF SUBSTITUTE FORM W-9
 
     To prevent backup withholding on payments that are made to a shareholder
with respect to Shares purchased pursuant to the Second Offer, the shareholder
is required to notify the Depositary of such shareholder's correct TIN by
completing the form below certifying (a) that the TIN provided on Substitute
Form W-9 is correct (or that such shareholder is awaiting a TIN), and (b) that
(i) such shareholder has not been notified by the Internal Revenue Service that
such shareholder is subject to backup withholding as a result of a failure to
report all interest or dividends or (ii) the Internal Revenue Service has
notified such shareholder that such shareholder is no longer subject to backup
withholding.
<PAGE>   11
 
WHAT NUMBER TO GIVE THE DEPOSITARY
 
     The shareholder is required to give the Depositary the social security
number or employer identification number of the record holder of the Shares
tendered hereby. If the Shares are in more than one name or are not in the name
of the actual owner, consult the enclosed Guidelines for Certification of
Taxpayer Identification Number on Substitute Form W-9 for additional guidance on
which number to report. If the tendering shareholder has not been issued a TIN
and has applied for a number or intends to apply for a number in the near
future, the shareholder should write "Applied For" in the space provided for the
TIN in Part I, and sign and date the Substitute Form W-9. If "Applied For" is
written in Part I and the Depositary is not provided with a TIN within 60 days,
the Depositary will withhold 31% of all payments of the purchase price to such
stockholder until a TIN is provided to the Depositary.
<PAGE>   12
 
- --------------------------------------------------------------------------------
 
  PAYER'S NAME:  CITIBANK, N.A., AS DEPOSITARY
 
<TABLE>
                            <S>                                        <C>               <C>
- --------------------------------------------------------------------------------
                             PART I -- PLEASE PROVIDE YOUR TIN IN THE  Social Security Number OR
                             BOX AT RIGHT AND CERTIFY BY SIGNING AND   /        /
                             DATING BELOW.
  SUBSTITUTE                                                           Employer Identification Number
  FORM W-9                                                             (If awaiting TIN write "Applied For")
  DEPARTMENT OF             --------------------------------------------------------------------------------------------
  THE TREASURY               PART II -- For Payees Exempt From Backup Withholding, see the enclosed Guidelines and complete
  INTERNAL                   as instructed therein. CERTIFICATION -- Under penalties of perjury, I certify that:
  REVENUE SERVICE             (1) The number shown on this form is my correct Taxpayer Identification Number (or a Taxpayer
  PAYER'S REQUEST                 Identification Number has not been issued to me and either (a) I have mailed or delivered
  FOR TAXPAYER                    an application to receive a Taxpayer Identification Number to the appropriate Internal
  IDENTIFICATION                  Revenue Service ("IRS") or Social Security Administration office or (b) I intend to mail or
  NUMBER (TIN)                    deliver an application in the near future. I understand that if I do not provide a Taxpayer
                                  Identification Number within sixty (60) days, 31% of all reportable payments made to me
                                  thereafter will be withheld until I provide a number), and
                              (2) I am not subject to backup withholding either because I have not been notified by the IRS
                                  that I am subject to backup withholding as a result of failure to report all interest or
                                  dividends, or the IRS has notified me that I am no longer subject to backup withholding.
                            --------------------------------------------------------------------------------------------
                             CERTIFICATION INSTRUCTIONS -- You must cross out item (2) above if you have been notified by the
                             IRS that you are subject to backup withholding because of underreporting interest or dividends
                             on your tax return. However, if after being notified by the IRS that you were subject to backup
                             withholding you received another notification from the IRS that you are no longer subject to
                             backup withholding, do not cross out item (2).
                             (Also see instructions in the enclosed Guidelines.)


                             --------------------------------------------    DATE ________________, 1997
                              SIGNATURE
</TABLE>
 
- --------------------------------------------------------------------------------
 
NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP WITHHOLDING
      OF 31% OF ANY PAYMENTS MADE TO YOU PURSUANT TO THE SECOND OFFER. PLEASE
      REVIEW THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER
      IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.
 
           Questions and requests for assistance or additional copies
           of the Offer to Purchase, the First Supplement, the Second
        Supplement, the Third Supplement, the Letter of Transmittal and
              other tender offer materials may be directed to the
          Information Agent or the Dealer Managers as set forth below:
 
                 The Information Agent for the Second Offer is:
 
                                 mackenzie logo
 
                                156 Fifth Avenue
                            New York, New York 10010
                         (212) 929-5500 (call collect)
                                       or
                         CALL TOLL FREE (800) 322-2885
 
                  The Dealer Managers for the Second Offer is:
 
<TABLE>
<S>                                    <C>                             <C>
  WASSERSTEIN PERELLA & CO., INC.           J.P. MORGAN & CO.                 MERRILL LYNCH & CO.
        31 West 52nd Street                   60 Wall Street                World Financial Center
     New York, New York 10019                 Mail Stop 2860                      North Tower
           Call Collect:                 New York, New York 10260        New York, New York 10281-1305
           (212)969-2700                (800) 576-5070 (toll free)       (212) 449-8211 (call collect)
</TABLE>
 









  

<PAGE>   1
 
                         NOTICE OF GUARANTEED DELIVERY
                            FOR TENDER OF SHARES OF
       COMMON STOCK AND SERIES A ESOP CONVERTIBLE JUNIOR PREFERRED STOCK
     (including, in each case, the associated Common Stock Purchase Rights)
                                       OF
                                  CONRAIL INC.
                                       TO
 
                            GREEN ACQUISITION CORP.
                                CSX CORPORATION
                                      AND
                          NORFOLK SOUTHERN CORPORATION
                   (Not to be Used for Signature Guarantees)
 
     This Notice of Guaranteed Delivery, or one substantially in the form
hereof, must be used to accept the Second Offer (as defined below) if (i)
certificates ("Share Certificates") evidencing shares of common stock, par value
$1.00 per share (the "Common Shares"), or shares of Series A ESOP Convertible
Junior Preferred Stock, without par value (the "ESOP Preferred Shares" and,
together with the Common Shares, the "Shares"), of Conrail Inc., a Pennsylvania
corporation (the "Company"), including the associated common stock purchase
rights (the "Rights") issued pursuant to the Rights Agreement, dated July 19,
1989, between the Company and First Chicago Trust Company of New York, as Rights
Agent, are not immediately available, (ii) time will not permit all required
documents to reach Citibank, N.A., as Depositary (the "Depositary"), prior to
the Expiration Date (as defined in "Amended Terms of the Second Offer;
Expiration Date" of the Third Supplement (as defined below)) or (iii) the
procedures for book-entry transfer cannot be completed on a timely basis. All
references herein to the Common Shares, ESOP Preferred Shares or Shares include
the associated Rights. This Notice of Guaranteed Delivery may be delivered by
hand or transmitted by telegram, facsimile transmission or mail to the
Depositary. See "Procedures for Tendering Shares" of the Offer to Purchase.
 
                    The Depositary for the Second Offer is:
 
                                 CITIBANK, N.A.
 
<TABLE>
<CAPTION>
             By Hand:                          By Mail:                   By Overnight Carrier:
<S>                               <C>                               <C>
          Citibank, N.A.                    Citibank, N.A.                    Citibank, N.A.
      Corporate Trust Window       c/o Citicorp Data Distribution,   c/o Citicorp Data Distribution,
    111 Wall Street, 5th Floor                   Inc.                              Inc.
     New York, New York 10043               P.O. Box 7072                    404 Sette Drive
                                      Paramus, New Jersey 07653         Paramus, New Jersey 07652
                         Facsimile for Eligible Institutions: (201) 262-3240
                                 To confirm fax only: (800) 422-2077
</TABLE>
 
     DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS OTHER THAN AS
SET FORTH ABOVE, OR TRANSMISSION OF INSTRUCTIONS VIA FACSIMILE TRANSMISSION
OTHER THAN AS SET FORTH ABOVE, WILL NOT CONSTITUTE A VALID DELIVERY.
 
     THIS FORM IS NOT TO BE USED TO GUARANTEE SIGNATURES. IF A SIGNATURE ON A
LETTER OF TRANSMITTAL IS REQUIRED TO BE GUARANTEED BY AN "ELIGIBLE INSTITUTION"
UNDER THE INSTRUCTIONS THERETO, SUCH SIGNATURE GUARANTEE MUST APPEAR IN THE
APPLICABLE SPACE PROVIDED IN THE SIGNATURE BOX ON THE LETTER OF TRANSMITTAL.
<PAGE>   2
 
Ladies and Gentlemen:
 
     The undersigned hereby tenders to Green Acquisition Corp., a Pennsylvania
corporation, upon the terms and subject to the conditions set forth in the Offer
to Purchase, dated December 6, 1996 (the "Offer to Purchase"), as amended and
supplemented by the Supplement thereto, dated December 19, 1996, the Second
Supplement thereto, dated March 7, 1997, the Third Supplement thereto, dated
April 10, 1997 (the "Third Supplement"), and the (green) Letter of Transmittal
circulated with the Third Supplement (which, as amended from time to time,
collectively constitute the "Second Offer"), receipt of each of which is hereby
acknowledged, the number of Shares specified below pursuant to the guaranteed
delivery procedures described in "Procedures for Tendering Shares" of the Offer
to Purchase.
 
<TABLE>
<S>                                                  <C>
Number of Shares:                                    Name(s) of Record Holder(s):
- ------------------------------------------------     ------------------------------------------------

Certificate Nos. (if available):
- ------------------------------------------------     ------------------------------------------------
                                                                       PLEASE PRINT
Check ONE box if Shares will be tendered by
book-entry transfer:                                 Address(es): 
[ ] The Depository Trust Company                                 -----------------------------------
                                                     ------------------------------------------------
[ ] Philadelphia Depository Trust Company                                ZIP CODE
                                                     Area Code and Tel. No.:
Account Number:
                --------------------------------     ------------------------------------------------
Dated:                 , 1997
      ----------------
</TABLE>
 
                                   GUARANTEE
                   (NOT TO BE USED FOR SIGNATURE GUARANTEES)
 
     The undersigned, a member firm of a registered national securities
exchange, a member of the National Association of Securities Dealers, Inc. or a
commercial bank or trust company having an office or correspondent in the United
States, hereby guarantees delivery to the Depositary, at one of its addresses
set forth above, of certificates evidencing the Shares tendered hereby in proper
form for transfer, or confirmation of book-entry transfer of such Shares into
the Depositary's accounts at The Depository Trust Company or the Philadelphia
Depository Trust Company, in each case with delivery of a properly completed and
duly executed Letter of Transmittal (or facsimile thereof) with any required
signature guarantees, or an Agent's Message (as defined in "Acceptance for
Payment and Payment for Shares" of the Offer to Purchase), and any other
documents required by the Letter of Transmittal, (a) in the case of Shares,
within three New York Stock Exchange, Inc. trading days after the date of
execution of this Notice of Guaranteed Delivery, or (b) in the case of Rights, a
period ending the latter of (i) three New York Stock Exchange, Inc. trading days
after the date of execution of this Notice of Guaranteed Delivery or (ii) three
business days after the date Right Certificates are distributed to stockholders.
 
     The Eligible Institution that completes this form must communicate the
guarantee to the Depositary and must deliver the Letter of Transmittal and
certificates for Shares to the Depositary within the time period shown herein.
Failure to do so could result in financial loss to such Eligible Institution.
 
<TABLE>
<S>                                                  <C>
- ------------------------------------------------     ------------------------------------------------
                  NAME OF FIRM                                     AUTHORIZED SIGNATURE

- ------------------------------------------------     ------------------------------------------------
                    ADDRESS                                               TITLE
 
                                                     Name:
- ------------------------------------------------           ------------------------------------------
                    ZIP CODE                                           PLEASE PRINT
Area Code and Tel. No.:                              Date:                                     , 1997
                       -------------------------          -------------------------------------
</TABLE>
 
          NOTE: DO NOT SEND CERTIFICATES FOR SHARES WITH THIS NOTICE.
       SHARE CERTIFICATES SHOULD BE SENT WITH YOUR LETTER OF TRANSMITTAL.

<PAGE>   1








                                                                 EXHIBIT (c)(14)





                                 April 8, 1997



Mr. David R. Goode
Chairman, President and
  Chief Executive Officer
Norfolk Southern Corporation
Three Commercial Place
Norfolk, Virginia  23510

Dear David:

                        This letter sets forth our agreement concerning the
basis on which CSX Corporation ("CSX") and Norfolk Southern Corporation ("NSC")
would jointly participate in the acquisition of Conrail Inc. ("CRR") consistent
with CSX's merger agreement, as amended through the third amendment, dated
March 7, 1997 (the "Third Amendment"), and as further amended consistent with
the terms hereof through the fourth amendment dated the date hereof (the
"Fourth Amendment"), with CRR (the "Merger Agreement").  Under this Agreement,
CSX and NSC jointly will acquire all CRR shares not already owned by CSX and
NSC through CSX's outstanding tender offer (such outstanding tender offer as
supplemented to include NSC's participation as set forth herein, the "Amended
Second Offer") and the subsequent merger contemplated by the Merger Agreement
(the "Merger").  CRR will be the "Surviving Corporation" in the Merger, as
provided in the Merger Agreement.  While this letter is provided as an outline
of our agreements and will be followed by Definitive Documentation (as
hereinafter defined), it is a binding obligation with respect to the matters
described herein.  As used in this Agreement, "CSX" and "NSC" will include the
respective rail subsidiaries of CSX and NSC, as the context requires.

                        1.        CSX/NS Acquisition Sub.

                        Formation.  Promptly following the execution of this
Agreement, and subject to NSC's consent as provided below, CSX (or CSX and NSC)
will form a new entity under the laws of a jurisdiction to be determined, which
may be in corporate, partnership or limited liability company form ("CSX/NS
Acquisition Sub").  The authorized capital stock or similar equity interests or
units of CSX/NS Acquisition Sub (the "Equity") will consist solely of two
classes with identical economic and other rights, except that one class will
have voting rights and the other class will not have voting rights.  CSX/NS
Acquisition Sub will be capitalized by CSX and NSC through the Stock
Contributions, which will have a deemed aggregate valuation of $2,898,263,640,
and Cash Contributions, all as provided
<PAGE>   2


Mr. David R. Goode
April 8, 1997
Page 2




below.  Upon and immediately following the Stock Contributions as provided
below, the Equity with voting rights of CSX/NS Acquisition Sub will be owned
50% by CSX and 50% by NSC (with a deemed aggregate valuation of
$1,886,000,000), and the Equity without voting rights of CSX/NS Acquisition Sub
will be owned solely by CSX (or its controlled subsidiary) (with a deemed
aggregate valuation of $1,012,263,640) and will represent 34.94% of the
aggregate Equity represented by the outstanding voting and non-voting Equity of
CSX/NS Acquisition Sub.  In connection with each Cash Contribution made under
this Agreement by CSX (or its controlled subsidiary) or NSC (or its controlled
subsidiary), non-voting Equity will be issued to the contributing party with a
deemed valuation equal to the amount of the related Cash Contribution.

                        Contributions.  CSX, through Green Acquisition Corp.
("Tender Sub"), currently has (and, except with respect to 100 CRR shares to be
retained by CSX, upon the Stock Contributions Tender Sub will have) a
beneficial interest in 17,775,124 CRR shares now held in a voting trust; and
NSC, through Atlantic Acquisition Corporation ("AAC"), currently has a
beneficial interest in 8,200,000 CRR shares now held in a voting trust.
Neither Tender Sub nor AAC has incurred any obligations or liabilities or
engaged in any business or activities other than, in the case of Tender Sub, as
contemplated in the Merger Agreement and, in the case of AAC, in connection
with the NSC tender offer and related matters.  Through the mechanics described
in the following paragraph, concurrently with the formation of CSX/NS
Acquisition Sub, CSX will contribute to CSX/NS Acquisition Sub all the capital
stock of Tender Sub and NSC will contribute to CSX/NS Acquisition Sub all of
its interest in such 8,200,000 CRR shares (such transactions, the "Stock
Contributions").  In connection with the Stock Contributions, (1) CSX will have
exclusive authority with respect to amendments to the CSX voting trust until
consummation of the Amended Second Offer and (2) CSX will be permitted to
retain 100 CRR shares outside of CSX/NS Acquisition Sub by conveyance from
Tender Sub prior to the Stock Contributions, by amendment to the Tender Sub
voting trust agreement to segregate such shares or otherwise.  In addition, in
connection with the Stock Contributions, NSC will have exclusive authority with
respect to amendments to the AAC voting trust until consummation of the Amended
Second Offer.  Notwithstanding anything to the contrary in the preceding two
sentences, no amendments shall be made to the Tender Sub voting trust or the
AAC voting trust that would impair the ability of the parties to consummate the
transactions contemplated herein in accordance with the terms hereof.

                        All CRR shares currently owned by Tender Sub and AAC,
and all additional CRR shares acquired pursuant to the Amended Second Offer and
the Merger, will continue to be held in voting trusts until the effective date
of Surface Transportation Board ("STB") approval of the transactions
contemplated by the Merger Agreement and by this Agreement.  In furtherance
thereof, without prejudice to CSX's and NSC's obligations to make the Stock
Contributions upon the formation of CSX/NS Acquisition Sub as promptly as
practicable following the execution hereof as provided herein, upon
consummation of the Amended Second Offer, CSX and NSC will cause the CRR shares
currently held in the Tender Sub and AAC voting trusts to be transferred to a
new or consolidated voting trust, in a form as agreed to by CSX and NSC, for
the benefit of CSX/NS Acquisition Sub, to which all additional CRR shares
acquired pursuant to the Amended Second Offer and the Merger will be
transferred for the benefit of CSX/NS Acquisition Sub.  CSX and NSC also will
cause the trustee of the new or consolidated voting trust to issue to CSX/NS
Acquisition Sub trust certificates representing all such CRR shares.  Following
consummation of the Amended Second Offer and the Merger, CSX/NS Acquisition Sub
(or its wholly owned
<PAGE>   3


Mr. David R. Goode
April 8, 1997
Page 3




subsidiary) will own voting trust certificates representing 100% of the stock
of the Surviving Corporation.

                        In addition to the Stock Contributions provided for
above, each of CSX (or its controlled subsidiary) and NSC (or its controlled
subsidiary) will contribute cash to CSX/NS Acquisition Sub to fulfill its
obligations under this Agreement (including, without limitation, for the
purpose of purchasing in the Amended Second Offer and the Merger all CRR shares
not already held by the Tender Sub and AAC voting trusts) (each, a "Cash
Contribution") in amounts such that the aggregate cash amount expended
(excluding legal, investment banking and other advisory fees and associated
expenses (collectively, "Advisor Expenses") and including only the amounts paid
for the shares and amounts specifically required under this Agreement to be
shared by Percentage) to acquire CRR shares by CSX, NSC and CSX/NS Acquisition
Sub is borne 42% by CSX and 58% by NSC (the 42%/CSX and 58%/NSC is hereinafter
referred to as the "Percentage"), valuing all CRR shares acquired prior to the
date hereof by CSX at $110 per share and by NSC at $115 per share; provided
that CSX will not be required to make Cash Contributions to CSX/NS Acquisition
Sub unless and until NSC shall have made at least $1,757,125,979 in Cash
Contributions to CSX/NS Acquisition Sub.  Such Cash Contributions will be made
in accordance with the terms under the subsection entitled "Formation" above
and at such times as are required to fulfill obligations hereunder (including,
without limitation, for Tender Sub to purchase CRR shares in the Amended Second
Offer and the Merger).  All cash contributed by CSX and NSC to CSX/NS
Acquisition Sub to purchase CRR shares in the Amended Second Offer and the
Merger in accordance with this Agreement will be contributed by CSX/NS
Acquisition Sub to Tender Sub to be used by Tender Sub (or its wholly owned
subsidiary formed to consummate the Merger) to purchase CRR shares in
accordance with the Merger Agreement.

                        CSX's and NSC's obligations to make the Stock
Contributions and the Cash Contributions required hereunder and their other
obligations hereunder are not subject to the condition that Definitive
Documentation has been agreed to by CSX and NSC.  The only conditions to CSX's
and NSC's obligations to make the Cash Contributions for the consummation of
the Amended Second Offer and the Merger will be those same conditions
applicable to CSX and Tender Sub as set forth in Section 15 of the CSX Offer to
Purchase, dated December 6, 1996, as amended (the "Offer to Purchase"), and in
the Merger Agreement, respectively.  In addition, notwithstanding whether the
conditions to consummation of the Amended Second Offer or Merger are satisfied,
CSX and NSC shall be obligated to make Cash Contributions as provided in this
Agreement or indemnity payments as provided in this Agreement in order to
satisfy any claims made against CSX and NSC following the date hereof under the
Merger Agreement or this Agreement (including without limitation under the
"put" provisions of the Pennsylvania Control Transaction Law (as defined in the
Offer to Purchase)) in accordance with "Other Liabilities" in Section 3 of this
Agreement.

                        Governance.  As described above, following the Stock
Contributions, each of CSX and NSC will have equal decision-making authority
with respect to matters relating to CSX/NS Acquisition Sub and its subsidiaries
(which, following the Stock Contributions, will include Tender Sub and Merger
Sub (as defined in the Merger Agreement)), including
<PAGE>   4


Mr. David R. Goode
April 8, 1997
Page 4




matters concerning the formation, organization, governance and activities
thereof.  In furtherance of the foregoing, until the Stock Contributions, CSX
will not take any action concerning the formation, organization, governance or
activities of CSX/NS Acquisition Sub, without the prior agreement of NSC.

                        Following the Stock Contributions, each of the parties
will have and may exercise a 50% voting interest in CSX/NS Acquisition Sub
(which may also be held in one or more controlled subsidiaries) and will have
the right to appoint 50% of CSX/NS Acquisition Sub's directors or similar
governing representatives.  Each of the parties will be entitled to appoint a
full time Co-Chief Executive Officer of CSX/NS Acquisition Sub, and all CSX/NS
Acquisition Sub executive appointments will be subject to approval by the board
of directors or similar governing body of CSX/NS Acquisition Sub.  In addition,
the parties will establish a protocol for the management of CSX/NS Acquisition
Sub as well as a list of those items that will require board approval.  The
provisions of this paragraph will apply equally to the governance of CRR
following the Control Date (as hereinafter defined) in order to effectuate the
transactions contemplated hereby (including on-going operation of Shared
Assets) as approved by the STB.

                        Subject to the other provisions hereof, in the event
any shares of common stock or other Equity in CSX/NS Acquisition Sub are
redeemed at any time, the parties agree that such redemption will occur in a
way to ensure that at all times CSX and NSC will have equal voting rights in
CSX/NS Acquisition Sub.

                        Further Actions.  Following the Control Date, CRR lines
and assets proposed to be operated by NSC or by CSX will be segregated from
other CRR lines and assets through the creation of CRR or Surviving Corporation
subsidiaries or operating divisions or through other means.  Subject to any
necessary regulatory approval, NSC and CSX will take and will cause CRR to take
such action as is necessary to name NSC nominees as the officers and directors
of the subsidiary or other entity holding the lines and assets to be operated
by NSC, and to name CSX nominees as the officers and directors of the
subsidiary or other entity holding the line and assets to be operated by CSX.

                        2.        Acquisition; Amended Second Offer; Merger
Agreement.

                        Amended Second Offer.  As promptly as practicable
following the execution hereof, the CSX Second Offer will be amended to add NSC
and CSX/NS Acquisition Sub as joint bidders and to extend the expiration date
thereof to 5:00 p.m. (New York City time) on May 23, 1997.  Each of CSX and NSC
will agree to the form of, and will be responsible for the accuracy and
completeness of the information it provides in connection with, CSX's pending
tender offer, any amendment thereto or of the Amended Second Offer and any
related publications and filings, including any notices required to be given
pursuant to the Pennsylvania Control Transaction Law.

                        Decision-making.  Each of CSX and NSC will have equal
decision-making authority with respect to the Amended Second Offer and the
Merger Agreement including any amendment thereof.  In furtherance of the
foregoing, neither CSX nor NSC will, without the prior agreement of the other
party, (x) agree to any modifications of the terms, conditions and/or timing of
the Amended Second Offer or make any determination as to the satisfaction of
any conditions thereto or (y) agree to any modifications of the terms and
conditions of, or give any consent or waiver or exercise any right of
termination under, the
<PAGE>   5


Mr. David R. Goode
April 8, 1997
Page 5




Merger Agreement, including without limitation any decision regarding the
exercise of the Green Option (as defined in the Merger Agreement) or under
Section 4.1 of the Merger Agreement.  In this regard, CSX will not, without
NSC's prior consent, agree to any determinations with respect to, or direct CRR
to take any action with respect to, CRR's Employee Stock Ownership Plan,
Pension Plan, Stock Employee Compensation Trust or any other CRR benefit plan.
The foregoing provisions are intended to provide that immediately upon
execution of this Agreement, NSC effectively will possess joint participation
and decision-making on an equal footing with CSX in providing any consents
under Section 4.1 of the Merger Agreement.  In addition, upon consummation of
the Amended Second Offer, CSX agrees that the Green Option shall be cancelled
without any consideration paid to CSX.

                        CSX will not take any action that would reasonably be
expected to result in CRR having a right to terminate the Merger Agreement in
accordance with its terms (and NSC will not take any action including, without
limitation, by withholding consent or making determinations under the preceding
paragraph, in any case, that could reasonably be expected to result in CRR
having a right to terminate the Merger Agreement, including as a result of a
breach by CSX of the Merger Agreement).  In addition, CSX will consult and
agree with NSC prior to providing any notices to CRR under the Merger Agreement
and shall promptly provide NSC with copies of all written notices provided by
CSX to CRR or received by CSX from CRR under the Merger Agreement.

                        CSX has supplied NSC with executed copies of an
amendment to CRR's Rights Plan and the Fourth Amendment and with certain
resolutions of the CRR Board which CSX has been advised have been enacted,
approved and delivered by the CRR Board immediately prior to the execution and
delivery of this Agreement, and NSC hereby consents to the taking of such
actions.

                        3.        CRR Division.  (a)  Division of Assets.
Subject to necessary regulatory approvals and implementation, CRR's routes
("Routes"), assets in proximity to such Routes ("Assets Related to the Routes")
and certain facilities (the "Facilities") will be divided and made available to
CSX and NSC, and where indicated CSX and NSC will have Joint Use/Shared Access
relating to "Shared Assets" (as defined below), all as specified in the map and
the schedules thereto which are attached as part of Exhibit A (it being
understood that the portion of Exhibit A entitled "Conrail Line Allocation" is
not intended to represent the precise cutpoints of Routes, which will be
determined in connection with the negotiation of the Definitive Documentation
based on operational practicalities, but rather is intended to be descriptive
of the line segments agreed to by the parties in Exhibit A).  Pursuant to this
division, except as provided more specifically hereafter or more fully
explained herein, following the implementation date of this division, (i) NSC
will acquire use of and responsibility for the management and costs (including
lease costs, if any) of the Altoona and Hollidaysburg shops, and (ii) CSX will
acquire use of and responsibility for the management and costs (including lease
costs) of the CRR headquarters building and the CRR information technology
facilities in Philadelphia; provided that to the extent that a Facility
referred to in (i) or (ii) immediately prior to such implementation date was
operated by CRR for the benefit of the CRR system as a whole, the party to
which such Facility is allocated will accommodate the needs of the other party
for a transition period following such implementation date, as will be provided
in the Definitive Documentation.
<PAGE>   6


Mr. David R. Goode
April 8, 1997
Page 6




                        Notwithstanding (i) and (ii) above, CSX and NSC will
jointly use and have responsibility for the following ("System Support
Operations"):  the customer service center in Pittsburgh; the crew management
facility in Dearborn; the system maintenance-of-way equipment center in Canton;
the signal repair center in Columbus; and the management of a portion of CRR
headquarters function and management at System Support Operations sufficient
for the management of the Surviving Corporation ("Continuing Conrail
Management").  The Continuing Conrail Management will be comprised of those
employees of CRR selected by both CSX and NSC to operate the Surviving
Corporation (including the System Support Operations).  The costs of Continuing
Conrail Management and of operating the Surviving Corporation will be shared
based on the Percentage.

                        It is the parties' current intention that the Surviving
Corporation will be preserved following the Merger, that the division of CRR
assets and the assumption of liabilities relating to CRR assets will be
specified in more detail in the Definitive Documentation and that CRR assets
and liabilities will be allocated pursuant to long-term operating agreements,
leases, one or more partnerships and/or limited liability companies and
indemnity arrangements which will be set forth in the Definitive Documentation.
However, the parties intend that, other than as described herein, the division
of CRR routes and assets described in Exhibit A will be final and do not intend
additional negotiation of such CRR routes and assets, except as agreed upon by
CSX and NSC to provide additional detail or under extraordinary circumstances.

                        It is the parties' intention that (a) prior to STB
approval, neither CSX nor NSC will at any time operate or exercise operational
control over any of the Routes or Assets Related to Routes or Facilities or
Shared Assets and (b) following STB approval, all CRR Routes and Assets Related
to Routes will be operated separately and independently by or for the
individual benefit of CSX or NSC, except (i) for such period after the Control
Date as may be necessary to effectuate the division of Routes and Assets
Related to Routes and Facilities contemplated hereby and as authorized by the
STB and (ii) for the operation of Shared Assets as defined and described in
Exhibit A pursuant to operating arrangements to be approved by the STB, if
applicable.

                        Rolling stock, locomotives and work equipment
("Equipment") will be allocated to, and made available for use by, CSX and NSC
in accordance with their respective Percentage.  CSX and NSC will negotiate the
allocation of Equipment by series and condition, giving effect to the
suitability of the equipment for use on, and to meet traffic and service needs
on, the Routes, Assets Related to a Route, Facilities and Shared Assets.
Because CRR's equipment financing debt will be included in Pooled Costs (as
hereinafter defined), the parties acknowledge that the final allocation of
Equipment may require an equitable adjustment with respect to Pooled Costs.  It
is the parties' current intention that Equipment will continue to be owned by
the Surviving Corporation or a subsidiary of the Surviving Corporation and
allocated to the parties pursuant to lease or other similar agreements.

                        Stock ownership or partnership interests held by CRR
and identified in Exhibit A.V. hereto will be allocated to either CSX or NSC as
provided in Exhibit A.V.

                        All CRR rolling-stock-related inventory and supplies
(including rolling-stock-related system stockpiles) at the Altoona and
Hollidaysburg shops as of the Control Date will be allocated to NSC, provided
that, to the extent that following the Control Date
<PAGE>   7


Mr. David R. Goode
April 8, 1997
Page 7




any work is performed at the request and for the account of CSX at the Altoona
or Hollidaysburg shops, then CSX shall not be charged for any materials or
supplies used in such work up to an amount equal to 42% of the total value of
the rolling-stock-related inventory and supplies (including
rolling-stock-related system stockpiles) at the Altoona and Hollidaysburg shops
as of the Control Date (ignoring inventory acquired for the purpose of
fulfilling a third-party contract, which will follow the contract).

                        All CRR furniture, fixtures, computers, office supplies
and equipment (other than Equipment and system stockpiles of supplies and
inventory, which will be allocated as otherwise provided herein) (all of the
foregoing, collectively, "FF&E") will be allocated between the parties as
follows: (i) all FF&E at CCR's Altoona and Hollidaysburg shops will be
allocated to NSC; (ii) all FF&E at CCR's Philadelphia headquarters building and
information technology center will be allocated to CSX; (iii) all FF&E located
in buildings on or along Allocated Assets will be allocated to the party
receiving such Allocated Assets; and (iv) all FF&E located in buildings on or
along Shared Assets, in System Support Operations facilities or elsewhere, will
be Pooled Assets and will be allocated or shared based on the Percentage.  All
CRR corporate memorabilia and antiques, such as artifacts, charters and art
wherever located, will be allocated equally between CSX and NSC.

                        All other assets not otherwise allocated herein
including, but not limited to, the following, will be "Pooled Assets" and will
be allocated or shared based on the Percentage:  (1) non-operating property and
improvements not in proximity to a Route, an Asset Related to a Route, a
Facility or a Shared Asset; (2) stock ownership or partnership interests (other
than interests allocated to either CSX or NSC as provided in Exhibit A.V.
hereto); (3) working capital; (4) employee benefits plans and the assets of
such plans; (5) system stockpiles of supplies and inventory regardless of
location (other than materials acquired for the purpose of fulfilling a
third-party contract, which will follow the contract, and other than as
provided above with respect to the rolling-stock-related inventory and supplies
(including rolling-stock-related system stockpiles) at the Altoona and
Hollidaysburg shops); (6) the System Support Operations; and (7) all other
assets not appurtenant to the allocated CRR assets.

                        (b)  Shared Assets.  Exhibit A specifies certain areas
of Joint Use/Shared Access where CRR routes and assets are to be made available
to both CSX and NSC on a shared basis ("Shared Assets") as described in Exhibit
A.  Except as specified in Exhibit A, Shared Assets will remain assets of CRR
or a subsidiary of CRR.

                        (c)  Liabilities.

                        General.  Environmental liabilities (known and unknown)
of CRR that relate predominately to a Route or an Asset Related to a Route or a
Facility (Exhibit A) to be allocated to CSX or NSC (an "Allocated Asset") will
be Pooled Costs when paid prior to the Control Date and will follow such
Allocated Asset when paid following the Control Date.  When expenses are paid
following the Control Date with respect to an environmental liability relating
to an Allocated Asset, the entity paying the expense will be reimbursed by CRR
or the Surviving Corporation to the extent of the net amount of any reserve
existing for such Allocated Asset as of the date hereof reduced by any payments
made and charged against such reserve through the Control Date.
<PAGE>   8


Mr. David R. Goode
April 8, 1997
Page 8




                        Liabilities (other than environmental liabilities,
which are provided for above) of CRR that arise after the Control Date and that
relate predominantly to an Allocated Asset will follow such Allocated Asset.
Except as otherwise provided herein, all other liabilities that (x) arise prior
to the Control Date and that relate predominately to an Allocated Asset or (y)
are Corporate Level (as defined below) liabilities will be Pooled Costs and
will be shared based on the Percentage.  The "Control Date" is the effective
date on which NSC and CSX are authorized by the STB to exercise control over
CRR.  "Corporate Level" liabilities will include, but not be limited to:  (1)
environmental liabilities associated with property that is not allocated to CSX
or NSC pursuant to Exhibit A; (2) all claims arising prior to the Control Date
and not otherwise specifically allocated herein with administration of such
claims to be handled by CSX or NSC, whichever has control over the Allocated
Asset where the incident arose or in cases in which a liability arises from an
incident or incidents occurring at more than one location, by the party having
control of the Allocated Asset most significantly involved; (3) employee
benefit costs arising before the Control Date and not otherwise specifically
allocated in this Agreement, e.g., health, accident, life and disability
benefits; (4) all taxes accruing for periods prior to the Control Date,
including tax leverage transactions; (5) taxes, if any, associated with the
division of CRR assets between CSX and NSC; (6) leases and lease termination
costs that arise prior to the Control Date (other than the costs of any lease
for the Philadelphia headquarters, the Philadelphia information technology
center or the Altoona or Hollidaysburg shops); (7) debt and debt guarantees;
(8) costs of FELA claims made prior to the Control Date, which will be Pooled
Costs, provided that the costs of FELA claims made on and after the Control
Date will become the liability of the party to which the relevant employee is
allocated (it being agreed that a FELA claim shall be considered "made" (i)
when a written report of the incident giving rise to the claim has been made by
the injured employee or the employee's supervisor to the employer or (ii) when
the claimant's employer has made or filed a FRA report of an injured employee
or (iii) for an employee or former employee alleging an occupational injury,
when such employee has completed a written questionnaire regarding such injury
with the claim department or the employer has received written notice of legal
representation or notification of filing of a lawsuit regarding an employee or
former employee's claim); (9) all other employee costs not otherwise provided
for elsewhere herein or in the Definitive Documentation other than those for
claims which arise after an employee is transferred to either CSX or NSC (which
claims will be the responsibility of the party to whom such employee is
transferred); (10) liabilities arising prior to the Control Date from other
contracts; and (11) other transition costs of CRR not the sole responsibility
of CSX or NSC not specifically provided for elsewhere herein.  (The term
"arise" or "arising prior to the Control Date" means that the circumstances
giving rise to the liability have transpired, whether or not such liability has
been discovered, asserted or accrued.  If the circumstances giving rise to a
liability bridge the Control Date, the parties will apportion it to pre-Control
Date and post-Control Date periods, with disagreements being subject to binding
arbitration pursuant to the Definitive Documentation.)

                        Employee-related Liabilities.  For purposes of the
following, "Separation Costs" means labor protection costs, severance
(including payments under severance agreements), personnel relocation expenses
and all other dismissal expenses and stay bonuses (including liabilities under
the Third Amendment); and "contract" means covered by a collective bargaining
agreement.  Upon and following the Control Date:

                 (i)        Separation Costs associated with contract
                            employees at CRR's shops in Altoona and
                            Hollidaysburg will be the responsibility of
                            NSC.  Separation Costs
<PAGE>   9


Mr. David R. Goode
April 8, 1997
Page 9




                            associated with contract employees at CRR's
                            Philadelphia headquarters, Philadelphia
                            technology center and Pittsburgh customer
                            service center (notwithstanding the joint use
                            and responsibility provided for herein) will
                            be the responsibility of CSX.
                    
                            However, the on-going expenses of the
                            Continuing Conrail Management and of the
                            other System Support Operations will be
                            Pooled Costs while they are incurred for the
                            benefit of both parties.  Both CSX and NSC
                            will have the right, upon six months' prior
                            written notice, to notify the other party
                            that they no longer need a facility or
                            function or portion thereof the costs of
                            which were Pooled Costs at the time of such
                            notice.  Once the six-month period has
                            expired, the costs associated with such
                            facility or function or portion thereof with
                            respect to which notice was given will cease
                            to be Pooled Costs and will be allocated as
                            otherwise provided in this Agreement, but the
                            costs associated with the facility or
                            function or portion thereof which continue to
                            be incurred for the benefit of both parties
                            will continue to be Pooled Costs and shared
                            by Percentage.  Notwithstanding the
                            foregoing, Separation Costs associated with
                            Continuing Conrail Management employees and
                            System Support Operations employees shall be
                            allocated as otherwise provided herein.
                            
                 (ii)       Separation Costs associated with CRR contract
                            employees working jobs on Allocated Assets
                            will be the sole responsibility of the party
                            to which that Allocated Asset is allocated.
                            For each CRR contract employee working jobs
                            on Routes or Assets Related to Routes or
                            Facilities not primarily allocated to either
                            CSX or NSC (other than jobs that relate
                            primarily to Continuing Conrail Management or
                            Routes or Assets Related to Routes or
                            Facilities constituting System Support
                            Operations or Shared Assets), the Definitive
                            Documentation will establish a mechanism to
                            assign sole responsibility to either CSX or
                            NSC for the above costs and expenses.
                            
                 (iii)      Separation Costs, compensation and all other
                            expenses associated with employees of CSX or
                            NSC will be the sole responsibility of their
                            respective employing carrier.
                            
                 (iv)       Separation Costs associated with non-contract
                            employees (including payments to be made by
                            CSX, CRR or the Surviving Corporation under
                            the Merger Agreement) will be Pooled Costs
                            and shared by Percentage to the extent that
                            CRR assets are otherwise unavailable to
                            satisfy such expenses.
                            
                 (v)        Compensation and other expenses for employees
                            working jobs on Allocated Assets will be the
                            sole responsibility of the party to whom such
                            Allocated Asset has been allocated.
                            
                 (vi)       Without regard to the above, the Separation
                            Costs under CRR plans and agreements
                            (including the Third Amendment) for a CRR
                            employee who accepts employment with CSX or
                            NSC will be borne, subsequent to the date of
                            such employment, by the employing party.
<PAGE>   10


Mr. David R. Goode
April 8, 1997
Page 10




                Other Liabilities.  CSX and NSC will share by Percentage all 
other liabilities and costs incurred following the execution of this Agreement
relating to the Merger Agreement (including for CRR shares, if any, that are
"put" pursuant to the Pennsylvania Control Transaction Law) other than (a)
Advisor Expenses, which will be paid by the incurring party, and (b)(i) CSX's,
CRR's and the Surviving Corporation's liability to current or former CRR
shareholders for the pending claims in the pending CRR shareholders litigation
(other than litigation brought by NSC or its affiliates), which liability,
together with all related litigation costs (which shall not include CRR legal
fees incurred prior to the date hereof), shall be borne solely by CSX, and (ii)
CSX's (including Tender Sub's), CRR's and the Surviving Corporation's, on the
one hand, or NSC's (including AAC's), on the other hand, liability for
disclosure-based claims based on disclosures made prior to the date hereof
brought by current or former CRR shareholders in connection with the Merger
Agreement or the Amended Second Offer or the transactions contemplated thereby
based on the accuracy or completeness of information supplied by such party,
which liability, together with all related litigation costs (which shall not
include CRR legal fees incurred prior to the date hereof), shall be solely the
responsibility of CSX or NSC, respectively.

                        4.        Definitive Documentation.  Promptly after
execution of this Agreement, CSX and NSC will negotiate in good faith toward
reaching and will enter into and execute fuller documentation with respect to
the transactions contemplated hereby ("Definitive Documentation"), which
documentation will supercede this Agreement.  The Definitive Documentation will
include trackage rights and haulage agreements consistent with Exhibit B hereof
and will also implement the details provided in Exhibit A hereof.  To the
extent that the parties are unable to agree on any matter arising under this
Agreement or in the negotiation of the Definitive Documentation, the parties
will appoint Cannon Y. Harvey, Esq., or such other person as may be mutually
agreed upon in the event that Mr. Harvey is unable or unwilling to serve, as a
mediator to aid in resolving such matter through mediation for a period not to
exceed 30 days under the then current CPR Institute For Dispute Resolution
Mediation Procedure for Business Disputes.  The Definitive Documentation will
provide that all disputes and disagreements arising under the Definitive
Documentation will be resolved by binding arbitration in accordance with
procedures to be agreed upon and specified in the Definitive Documentation.
The provisions of this Section 4 shall not apply to any dispute for which a
party seeks an equitable remedy or other provisional relief.

                        5.        STB.  (a)  The parties will coordinate and
cooperate with one another with respect to matters involving the STB approval
process, and will as expeditiously as possible seek STB and any other
regulatory approval or authority necessary for consummating the transactions
contemplated by this Agreement and the Definitive Documentation.  The parties
will use their best efforts to obtain such approvals, and neither party will
take any position (at the STB or with any governmental or political body or
elsewhere) inconsistent with this Agreement and the Definitive Documentation.

                        (b)  CSX and NSC shall coordinate and consult with one
another with respect to all settlements involving the STB approval process.
The parties further understand that:  (1) any settlement or agreement
pertaining to the Shared Assets will require the joint approval of CSX and NSC;
(ii) neither CSX nor NSC shall make any settlement or agreement with respect to
a line or other asset which, after STB approval, would be operated in
<PAGE>   11


Mr. David R. Goode
April 8, 1997
Page 11




the interest of the other party without such other party's consent; and (iii)
nothing contained herein shall require joint action for either CSX or NSC to
enter into any settlement or railroad transportation contract with any shipper
or receiver of freight.

                        (c)  If any settlement or any accepted STB condition
relates to an Allocated Asset which, after STB approval, would be operated in
the interest of NSC or in the interest of CSX or (as in the case of Shared
Assets) would be operated in the interest of both, the burden of such
settlement or condition will be borne where it falls, and the Percentage will
not be adjusted to reflect the settlement or condition.

                        (d)  The Definitive Documentation and the voting trust
will include provisions specifying the parties' respective rights in the event
the STB imposes any non-standard condition materially reducing the benefits
anticipated by either party from the transaction.

                        6.        Access and Preservation.  Each of CSX and NSC
agrees to be bound by the terms of the Confidentiality Agreement dated March
13, 1997 (as if such agreement covered confidential information of either of
them) with respect to all confidential information to be provided by such
person to the other in connection with the transactions contemplated hereby.
Pursuant to the terms of Section 4.3 of the Merger Agreement, as amended, CSX
will use all reasonable efforts to cause NSC to be on an equal footing with CSX
with respect to the ability to obtain access to CRR property and personnel and
information about CRR.  Until NSC is placed on an equal footing with CSX, CSX
will provide NSC and its representatives access upon reasonable notice and at
reasonable times and upon other reasonable terms and conditions, subject to
availability under the Merger Agreement and to applicable regulations, to the
books and records and assets of CRR and to CRR employees and advisers having
knowledge of its business and affairs.

                        7.        NSC Offer.  Upon execution hereof, NSC will
terminate its outstanding tender offer for CRR shares.  Upon consummation of
the Amended Second Offer as modified in accordance with this Agreement, NSC
will withdraw its letter dated February 10, 1997 relating to the CRR 1997
Annual Meeting of Shareholders and, until such withdrawal, will take no action
in furtherance of the matters covered by such letter without CSX's consent,
unless the date of the CRR 1997 Annual Meeting of Shareholders is changed.

                        8.        Litigation.  Promptly following execution of
this letter agreement, NSC and CSX will take such action as is necessary to
dismiss with prejudice all pending lawsuits between the parties relating to the
CRR acquisition, and CSX, under the Merger Agreement, will not consent to the
taking of any action by CRR respecting, and, following the Merger will request
pursuant to Section 5.13 of the Merger Agreement the dismissal with prejudice
of, all claims and litigation against NSC, its officers and affiliates relating
to the CRR acquisition.  In addition, CSX will request pursuant to Section 5.13
of the Merger Agreement that CRR join in a stay or similar adjournment of any
such proceeding.

                        9.        Certain Obligations; Indemnification.  CSX
and NSC, as provided above, each having a 50% voting interest in CSX/NS
Acquisition Sub (which, following the Merger, will own 100% of the Surviving
Corporation) following the Stock Contributions, will cause the Surviving
Corporation to honor all commitments of the Surviving Corporation under the
Merger Agreement.  Except as may otherwise be provided in this
<PAGE>   12


Mr. David R. Goode
April 8, 1997
Page 12




Agreement, to the extent that, following the date hereof, any claims are made
under or in connection with the Merger Agreement against the Surviving
Corporation, CSX or NSC or any of their respective affiliates, CSX and NSC will
share any liability thereunder by Percentage, and each of CSX and NSC will
indemnify the other for its proportionate share according to Percentage, except
to the extent that any such liability results from a breach by the indemnified
party of the terms of this Agreement.  However, the indemnification
contemplated in the foregoing sentence will not cover the liability to be borne
solely by CSX or NSC as provided under the subsection entitled "Other
Liabilities" in Section 3.

                        10.       Disclosure.  Any written news releases and
any other disclosure required to be filed with any governmental authority
(other than routine information) pertaining to this Agreement or the
transactions contemplated hereby will be reviewed by and agreed upon by both
CSX and NSC prior to release, subject to requirements of law.

                        11.       Employment of Employees.  As promptly and
practicably as possible after the date hereof subject to any subsequent
modifications deemed necessary by CSX and NSC to ensure continuity of customer
service, CSX and NSC will jointly develop the staffing process to be followed
with the employment or redistribution of non-contract CRR personnel associated
with the CRR acquisition.  In addition, CSX and NSC will coordinate and consult
with one another in connection with the hiring of CRR personnel to CSX and NSC
in order to assure a smoother transition to the division contemplated hereby,
each party hereto recognizing these legitimate needs of the other with respect
to such hiring.

                        12.       Payments.  To the extent that a party is
liable and responsible for a payment item hereunder, such party will indemnify
the other hereto with respect to such item and such party will pay such item
directly, reimburse CRR for payment of such item or suffer an adjustment to the
contributions and distributions contemplated hereunder in respect of such
payment.  The parties agree to make capital contributions to CSX/NS Acquisition
Sub in a timely manner to fund payments required to be made under this
Agreement.

                        13.       Entire Agreement; No Third-Party
Beneficiaries; Consents.  This Agreement (including the exhibits hereto) and
the confidentiality agreements between the parties constitute the entire
agreement, and supersede all prior agreements and understandings, both written
and oral, among the parties with respect to the subject matter of this
Agreement and are not intended to confer upon any person other than the parties
any rights or remedies.  THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, REGARDLESS OF THE LAWS THAT
MIGHT OTHERWISE GOVERN UNDER APPLICABLE PRINCIPLES OF CONFLICT OF LAWS THEREOF;
PROVIDED, HOWEVER, THAT THE LAWS OF THE RESPECTIVE STATES OF INCORPORATION OF
EACH OF THE PARTIES HERETO SHALL GOVERN THE RELATIVE RIGHTS, OBLIGATIONS,
POWERS, DUTIES AND OTHER INTERNAL AFFAIRS OF SUCH PARTY AND ITS BOARD OF
DIRECTORS.  To the extent that any consent or concurrence is required under
this Agreement, such consent or concurrence will not be unreasonably withheld.
<PAGE>   13


Mr. David R. Goode
April 8, 1997
Page 13




                        If the terms of this letter are satisfactory to you,
please so signify by signing and returning to us the enclosed copy of this
letter so that work on the Definitive Documentation may begin.

                                        Sincerely,

                                        CSX CORPORATION

                                        By: /s/ JOHN W. SNOW
                                           -------------------------------------
                                             John W. Snow
Accepted and Agreed as of the
8th day of April, 1997.

NORFOLK SOUTHERN CORPORATION



By: /s/ DAVID R. GOODE
   ------------------------------
       David R. Goode
<PAGE>   14
                                    Exhibit A

I.  ROUTES

       CRR's routes ("Routes") will be assigned as shown on the attached maps
and as set out in the attached table captioned "Conrail Line Allocation."

II. ASSETS RELATED TO ROUTES.  Except as otherwise expressly provided in the 
letter agreement, "Assets Related to Routes" shall include the following:

         1.   the track structure (rails, ties, grading, bridges, tunnels,
              culverts, etc.),

         2.   the underlying right-of-way, operating and non-operating,
              regardless of its width, and associated structures,

         3.   except in areas of Shared Assets, or areas where the parties'
              respective Routes are approximately equidistant from the Asset
              Related to the Route in question, where other arrangements are
              made, appurtenant yards, sidings, switch tracks and repair or
              other maintenance facilities,

         4.   real estate (whether or not used for operating purposes) in
              proximity to the Routes,

         5.   signal, communications and computer facilities on the right-of-way
              and, to the extent used to operate the Routes, off the
              right-of-way (except where a particular S&C facility, such as a
              microwave tower, is used in conjunction with operation of both a
              Route going to NS and a Route going to CSXT, the parties shall
              negotiate an arrangement which will facilitate their respective
              operations),

         6.   tools and supplies located on and along the Routes, including
              repair materials, except system stockpiles of supplies and
              inventory,

         7.   equipment such as hi-rail cars and local repair equipment usually
              and customarily used on a Route (as opposed to systemwide),

         8.   contracts, agreements, and rights, other than transportation
              contracts, relating to a Route, including without limitation
              trackage and other operating rights, crossing agreements, leases,
              reversions, longitudinal easements and other occupancy agreements,
              and the rents and profits arising therefrom, and

         9.   muniments of title, valuation maps, surveys, files and records
              relating to a Route.
<PAGE>   15
III. JOINT USE/SHARED ACCESS AND OTHER CITY DETAIL
     ("SHARED  ASSETS")

The Definitive Documentation will include agreements providing for joint use of
the following CRR properties and rights (the "Shared Assets"), subject to the
operating principles here specified.


ASHTABULA HARBOR

NS will be assigned and control CR's Ashtabula Harbor facilities, with CSXT
receiving use and access, up to a proportion of the total ground storage,
throughput, and tonnage capacity of the facility equal to the Percentage.

CSXT will control the interlocking at the crossing of the CR Youngstown Line and
CR Chicago Line.

NS and CSXT agree that if either carrier acquires or controls additional Lake
Erie coal dock capacity, it will make arrangements with the other carrier to
maintain parity and competitive balance in dock access and coal ground storage.


BUFFALO

The attached map summarizes the CSXT/NS understanding for CR facilities in
Buffalo, subject to the following:

- -   CSXT will be assigned Seneca Yard, and both CSXT and NS will receive access
    to yard tracks in Seneca Yard sufficient for the origination and termination
    of trains (precise number of tracks to be determined), at the end of the CR
    Buffalo Line to be assigned to NS, for purposes of improved interchange with
    the South Buffalo RR.

- -   CSXT and NS will form a joint team to study and use reasonable efforts to
    resolve NS delay problems at CP Draw in Buffalo.


CHICAGO

The attached map summarizes the CSXT/NS understanding for CR facilities in
Chicago, subject to the following:

- -   Both NS and CSXT will have access to CR's route and right to BNSF's Willow
    Springs Yard.


                                        2
<PAGE>   16
- -   An agreement between NS and CSXT as IHB shareholders will provide that as
    between NS and CSXT:

    (a) CSXT will use and control IHB's Blue Island Yard, and NS will not
    utilize Blue Island Yard except for purposes of traffic to/from IHB switched
    industries;

    (b) NS will use and control the IHB line from CP 502/Indiana Harbor to
    Gibson Crossing for the purposes of connecting to the Streator Line;

    (c) IHB dispatching will ultimately be controlled by CSXT but the
    dispatching will be done locally in the Chicago area;

    (d) CSXT will nominate, and subject to NS's concurrence in the nomination,
    which will not be unreasonably withheld, the parties will vote to elect
    CSXT's nominee as General Manager of IHB; and

    (e) NS may from time to time at its reasonable option require that a
    different General Manager be elected pursuant to (d).

    (f) Both NS and CSXT will be considered owners for purposes of determining
    rights to use IHB facilities and lines, IHB switch charges, and access to
    IHB industries. Both NS and CSXT will have overhead trackage rights on all
    IHB lines.

- -   NS's rights over the IHB include use of B&OCT owned-trackage (IHB
    controlled) between Grand Trunk Tower (Blue Island) and the end of B&OCT
    ownership near McCook, and both CSXT and NS will retain access to Gibson
    Yard, which is used for multilevel classification.

- -   Should NS be dissatisfied with the treatment of its movements by IHB
    dispatchers, NS, CSXT and IHB will attempt to resolve these dispatching
    concerns. If the attempt does not resolve NS's concerns about IHB
    dispatching, NS will have the right to request a change in control of IHB
    dispatching to NS. If CSXT disagrees with that request for change in
    dispatching control, NS and CSXT agree to submit that request to binding
    arbitration. From time to time, not more frequently than 12 months after the
    last change in dispatching control or arbitration, the party not controlling
    dispatching may again seek a change, and require arbitration.


- -   NS and CSXT will maintain competitive balance over and through the Chicago
    gateway (including Streator), and will take appropriate steps to give the
    other carrier parity in Chicago-area ownership, dispatching and operational
    control as follows: If either party obtains additional control or additional
    ownership of Chicago terminal carriers (including but not limited to IHB,
    BRC, and EJ&E) or additional control of routes through Chicago, including
    ownership or control acquired by future merger, purchase, or other means,
    each hereby grants to the other a right to acquire an interest sufficient to
    maintain parity, at a


                                        3
<PAGE>   17
    price proportionate to the price paid by the acquiror, of any such ownership
    interest or additional control, however it is achieved. If either NS or CSXT
    feels that an action by the other party has upset the parity in the Chicago
    gateway and is unsuccessful in directly resolving the dispute, it may submit
    the dispute to binding arbitration.

- -   If the IHB agreements affecting or pertaining to Chicago's trackage expire
    or other operating agreements affecting Conrail operations expire, then CSXT
    and NS will take appropriate steps to execute new agreements or take other
    measures to preserve and maintain the interests of CSXT and NS as provided
    in this agreement.

- -   Should CSXT merge with BNSF and if CSXT requests, then NS agrees to transfer
    the Streator line from Osborne Crossing, including the dispatching control,
    for fair value.

- -   CSXT will be assigned CR's 59th St. ("Panhandle") Yard site.

- -   CSXT will receive interim use of CR's Park Manor (63rd St.) intermodal
    facility during the period of CSXT's interim haulage between Chicago and
    Berea.


CLEVELAND

The attached map summarizes the CSXT/NS understanding for CR facilities in
Cleveland, subject to the following:

- -   NS will have rights to construct a connection in eastern Cleveland to make
    direct moves between NS's Cleveland-Buffalo line and the CR Chicago line,
    using NS rights over CR's Cleveland Short Line to be assigned to CSXT.

- -   CR's Collinwood Yard will be assigned to CSXT, and CR's Rockport Yard will
    be assigned to NS.

- -   The Ford engine plant (located on the NS portion of CR in Cleveland) and the
    Parma auto plant (currently joint CSXT/CR) located on the CSXT portion of CR
    in Cleveland will be jointly served.


COLUMBUS, OH

The attached map summarizes the CSXT/NS understanding for CR facilities in
Columbus, subject to field verification and the following:

- -   NS will be assigned CR's Buckeye Hump Yard. CSXT will be assigned the former
    "local yard" at Buckeye and the CR intermodal terminal at Buckeye.


                                        4
<PAGE>   18
- -   CSXT will be assigned the Buckeye Yard Lead from the north limit of "CP
    Buckeye" to "CP Darby." NS will be assigned the east track from "CP 138" to
    "CP 136," and CSXT will be assigned the west track between the same points.
    North of "CP 136," the current end of double track, NS will be assigned the
    right of way east of the single remaining track, and the Clintonville
    Siding, east of the single remaining track, with the intent to connect these
    two segments into a continuous track east of and parallel to the single
    remaining track. A new connection will be constructed, at NS expense,
    between the Clintonville Siding and the existing NS Bellevue-Portsmouth main
    line in the vicinity of Milepost 133.5, where both the NS and CR rights of
    way are parallel and level. CSXT shall, at its option and expense, have the
    right to construct a connection from its assigned track, the west located
    track of the right of way, to the new NS Clintonville Siding, so that both
    tracks can be utilized for operational flexibility between the vicinity of
    Milepost 133.5 to "CP 138," under the control of the respective assignee of
    each track.

- -   NS will control Buckeye interlocking, and CSXT will control CP-Mounds. CSXT
    will control the Buckeye Yard lead north of the limits of Buckeye
    interlocking. NS will have the right to construct a parallel track to the
    Buckeye Yard lead in order to provide for the proper functioning of Buckeye
    Yard.


DETROIT

The attached maps summarize the CSXT/NS understanding for CR facilities in
Detroit, subject to the following:

- -   The NS/CSXT Detroit commercial joint area includes all CR trackage and
    access rights east of CP-Townline(Michigan Line MP 7.4) and south to and
    including Trenton (Detroit Line MP 20).

- -   NS will have operating control (dispatching) of CR routes from the south
    (Toledo, via Ecorse) and west (Kalamazoo, via CR's Junction Yard Branch)
    into NS's Oakwood Yard. This disposition does not change the boundaries of
    the NS/CSXT Detroit joint commercial area.

- -   Both CSXT and NS will have rights to run their own trains over the trackage
    in the NS/CSXT joint commercial area.

- -   Lincoln Yard disposition has not been resolved and will be determined in
    Definitive Documentation.


                                        5
<PAGE>   19
ERIE, PA

NS will have a free easement along CR right of way through Erie assigned to CSXT
to replace NS right of way through streets in downtown Erie. Specifics including
length to be determined. All costs of associated construction and relocation
will be the responsibility of NS. NS will have trackage rights in Erie to
connect its route from Corry to its existing Buffalo-Cleveland line if such
connection can be achieved without using the CR Buffalo- Cleveland line.


FORT WAYNE, IN

CSXT will be assigned the NS and CR Fort Wayne Line in order to form a
contiguous route between Crestline and Chicago. Mike interlocking at Fort Wayne
and the Bucyrus interlocking will be controlled by NS.

A line relocation project underway in Fort Wayne will force NS and CSXT to share
the former CR line between Junction and Hadley (crossing of former PRR and NKP
West of Fort Wayne). Should NS and CSXT decide that capacity needs mandate an
additional track, NS and CSXT will equally share the cost of constructing a new
track between Junction and Hadley on the north side of the existing track, and
ownership of the south track will revert to NS and ownership of the north track
will revert to CSXT.

CSXT and NS will inspect and agree to divide CR's space in CR's Piqua Yard and
determine most efficient means of utilizing the physical plant in Fort Wayne.
Triple Crown will retain its current space in Piqua Yard and the right to have
NS operate its trains between Piqua Yard and Mike interlocking. The NS Fort
Wayne to Chicago line will be transferred to CSXT as part of a like kind
exchange for the Streator line.

INDIANAPOLIS

- -   NS will be assigned Hawthorne Yard and NS will have sufficient tracks for
    the arrival, departure and make up of trains and will have reasonable access
    to and from the designated tracks.


MONONGAHELA

- -   NS shall be assigned, control, operate and maintain Monongahela subject to a
    joint use agreement providing CSXT equal, perpetual access to all current
    and future facilities located or accessed from the former Monongahela
    Railway, including Waynesburg Southern, hereinafter "Monongahela". NS and
    CSXT shall share the operating and maintenance expenses on Monongahela on a
    usage basis.


                                        6
<PAGE>   20
- -   CSXT and NS will both be able to separately provide transportation service
    to all customers on the Monongahela and no additional access fee will be
    charged CSXT for the joint usage. The parties will jointly work together to
    extend the Monongahela into the Enlow Fork and Bailey Mine area.

- -   Either party may request the construction of additional capacity and the
    requesting party shall bear the expense therefor unless the parties decide
    to share the additional capacity and the expense therefor.

- -   Should CSXT be dissatisfied with the treatment of its movements by
    Monongahela dispatchers, NS and CSXT will attempt to resolve these
    dispatching concerns. If the attempt does not resolve CSXT's concerns about
    Monongahela dispatching, CSXT will have a right to request a change in
    control of Monongahela dispatching to CSXT. If NS disagrees with that
    request for change in dispatching control, NS and CSXT agree to submit that
    request to binding arbitration. From time to time, not more frequently than
    12 months after the last change in dispatching control or arbitration, the
    party not controlling dispatching may again seek a change, and require
    arbitration. Neither party may sell or transfer its rights to the
    Monongahela without first offering the other party the right of first
    refusal.


NS/CSXT NORTH JERSEY COMMERCIAL JOINT AREA

The attached maps summarize the CSXT/NS understanding for CR facilities in
Northern New Jersey, subject to the following: (Dispatching to be determined by
Definitive Documentation).

- -   The limits of the North Jersey NS CSXT commercial joint area will encompass
    all northern New Jersey trackage east of, and including, the Northeast
    Corridor, plus:

    - CR Lehigh Line west to CP Port Reading Jct., NJT Raritan Line, CR Port
    Reading Secondary west to Bound Brook and CR Perth Amboy Secondary west to
    South Plainfield.

- -   The NS/CSXT North Jersey commercial joint area includes the Northeast
    Corridor local service south to the Trenton market.

- -   The Port Newark/Elizabeth Marine Terminal area will be accessible to both
    CSXT and NS including:

    - Port Newark

    - Dockside (Expressrail)

    - Portside (Triple Crown)


                                        7
<PAGE>   21
- -   CSXT will be assigned CR's North Bergen and South Kearny (non-APL portion)
    intermodal terminals. CSXT will also be assigned CR developable property
    encompassing current CR Elizabethport Yard (Trumbull St. Yard). NS will be
    afforded use of two tracks for support of E-Rail intermodal facility.

- -   CSXT and NS both will have access to the APL terminal in Kearny.

- -   NS will be assigned CR's Croxton and E-Rail intermodal facilities. NS will
    also be assigned the CR developable property adjacent to E-Rail (former CNJ
    shops area).

- -   Oak Island Yard and auto terminals at Doremus Avenue, Greenville, and
    Ridgefield Heights will be included in the NS/CSXT North Jersey Commercial
    Joint Area, and be accessible to both CSXT and NS.

- -   Both CSXT and NS will have the right to operate their own trains over any
    part of the NS/CSXT North Jersey Commercial Joint Area, except to
    exclusively assigned facilities.

- -   In Definitive Documentation, CSXT and NS will consider arrangements
    acceptable to the parties so each will have one controlled route through the
    NS/CSXT North Jersey Commercial Joint Area to the extent practicable.


PHILADELPHIA/SOUTH NEW JERSEY

The attached maps summarize the CSXT/NS understanding for CR facilities in
Philadelphia and South New Jersey, subject to the following:

- -   The NS/CSXT Philadelphia/South Jersey commercial joint area includes all CR
    "Philadelphia" stations and stations within the Philadelphia City limits,
    industries located on the CR Chester Industrial and CR Chester Secondary
    tracks, all CR trackage in South New Jersey, and the CR freight franchise
    rights on Amtrak's Northeast Corridor north from Philadelphia (Zoo Tower) to
    the Trenton, NJ market.

- -   The Morrisville intermodal facility is assigned to NS.

- -   CSXT will be assigned a contiguous route through Philadelphia from CSXT's
    (future) Eastwick connection to be constructed by CSXT, via CP Field and
    portions of CR's Harrisburg and Trenton lines to CP River and points north.
    In addition, CSXT will be assigned the Philadelphia/South Jersey Terminal
    trackage from CP Field to Pier 122 (Greenwich Yard area).

- -   To maintain a contiguous route through Philadelphia on the Northeast
    Corridor, NS will have the option to reconstruct, own and control an
    additional track where practical between Belmont and CP Field.

- -   CSXT is assigned Greenwich Yard property, with the exception of tracks used
    to support


                                        8
<PAGE>   22
    local freight service and the ore pier. NS and CSXT will continue to serve
    the Ameriport intermodal terminal or any replacement substantially built
    with public funding.

- -   Both CSXT and NS will have the right to operate their own trains over any
    part of the NS/CSXT Philadelphia/South New Jersey commercial joint area.


TOLEDO

The attached map summarizes the CSXT/NS understanding for CR facilities in
Toledo, subject to the following:

- -   CR's Stanley Yard will be assigned to CSXT.

- -   CR's Airline Jct. Yard will be assigned to NS.

- -   CSXT and NS will form a joint team to study and use reasonable efforts to
    resolve CSXT delay problems at Vickers interlocking in Toledo.


WASHINGTON, DC

The attached map summarizes the CSXT/NS understanding for CR facilities in
Washington, DC.


AMTRAK, NORTHEAST CORRIDOR (N.E.C.) RIGHTS

- -   Commercial Definition

    -  North End - Philadelphia (Zoo tower) to New York (Penn Station) will be
       part of the NS/CSXT Commercial Joint Area (NS and CSXT having equal
       customer access).

    -  South End - Washington, D.C. to Philadelphia (Zoo tower) exclusive to NS.

- -   Operating Definition

    -  Each party will have overhead trackage rights to operate trains between
       New York and Washington, D. C., as follows:

    -  Between Zoo tower and Penn Station and between Landover and Baltimore,
       rights shall be shared equally and scheduled alternatively.

    -  Between Baltimore and Zoo Tower, CSXT shall be limited to 4 trains a day.


                                        9
<PAGE>   23
GENERAL

- -   CSXT and NS will have the right to make unilateral improvements in tracks
    and other facilities within joint commercial areas at their own cost.

- -   "Assigned" indicates authority and responsibility for operation and control
    under whatever business structure the parties specify in the Definitive
    Documentation.

- -   A "commercial joint area" or "joint commercial area" is a group of stations
    in a common geographic area to which both NS and CSXT will have access
    pursuant to the terms of this agreement and the Definitive Documentation.


IV.    FACILITY ASSIGNMENT ("Facilities")

    1. Altoona and Hollidaysburg Shops - NS

    2. Philadelphia Headquarters and Philadelphia area information technology
       facilities - CSXT

    3. Customer Service Center (Pittsburgh) - CSXT and NS

    4. Crew Management Facility (Dearborn) - CSXT and NS

    5. Signal System Repair Center (Columbus) - CSXT and NS

    6. System Maintenance of Way Equipment Center (Canton) - CSXT and NS

    The Definitive Documentation will address the handling of train dispatching
facilities.

V.     DISPOSITION OF CERTAIN CONRAIL INTERESTS

- -   Belt Railway of Chicago - CR's 16.67% interest in is assigned to NS

- -   Trailer Train (TTX) - CR's 21.81% interest in is divided as follows:

<TABLE>
<CAPTION>
                               CSXT            NS
<S>                           <C>            <C>   
          Current              9.340%         6.800%
          Conrail Splits       9.635         12.175        (21.81%)
                              ------         ------
                              18.975%        18.975%
                              ======         ======
</TABLE>

     
- -   Peoria & Pekin Union - CR's 25.64% interest in is assigned to NS.


                                       10
<PAGE>   24
- -   Lakefront Dock - CR's 50% interest in is assigned to CSXT.

- -   CR's ownership in IHB will be assigned equally between CSXT and NS. It is
    the parties' current intention that CR's ownership in IHB will continue in
    CR. See city detail and trackage rights for details of IHB operations.

- -   CR's ownership interest in the following affiliates will be shared based on
    the Percentage, except where any of the assets of these affiliates are part
    of the Routes or Assets related to Routes or Facilities assigned to either
    NS or CSXT or are Shared Assets, then such affiliate assets will be assigned
    to the specific geography and not shared by the Percentage. However, if
    assets of these affiliates are solely assigned to one carrier based on
    specific geography, and are valued at greater than $1 million, then the
    other carrier will be due a portion of the value equal to that carrier's
    Percentage:

      - Merchants Dispatch Transportation
      - Locomotive Management Services
      - CRC Properties, Inc.
      - CRR Investments, Inc.

- -   The following affiliates are part of the route assets of CSXT and are
    assigned to CSXT:

      - SL&A Railway
      - Albany Port Railway

- -   Triple Crown: Conrail's share will be assigned to NS.

- -   Conrail Direct - a truck contracting subsidiary which arranges pick-up and
    delivery of intermodal freight. Company will be shared by Percentage until
    parties can agree on a process for separation.

- -   EMP - a container leasing partnership including CR, NS and UP. CR's interest
    will be shared by the Percentage and CSXT will be made a partner.


                                       11
<PAGE>   25
                                    Exhibit B

                           TRACKAGE RIGHTS AND HAULAGE

CSXT RIGHTS ON NS

PERMANENT

- -   CP River (West Falls), PA - Abrams, PA: Overhead trackage rights on CR's
    Harrisburg Line for dimensional traffic.

- -   CP King (Norristown), PA - Woodbourne (CP Wood), PA: Overhead trackage
    rights on CR's Morrisville Line for dimensional traffic plus runaround
    rights on short portion of SEPTA's Norristown Line.

- -   Cleveland - Lorain, Fairlane, OH: Overhead trackage rights on CR's Chicago
    Line to serve 2-to-1 auto plants at Fairlane and Avon Lake (CR Lorain).

- -   Berea, OH - CP 181 (Cleveland, OH): Overhead trackage rights on CR's Chicago
    Line.

- -   Chicago (Pine to Rock Island Jct.): Overhead trackage rights on CR Chicago
    Line.

- -   Columbus, OH: Overhead trackage rights on CR Buckeye Line from "CP Hocking"
    to Buckeye Yard, overhead trackage rights on CR Western Branch from Bannon
    to Scioto, overhead trackage rights on CR Cincinnati Line from "CP 139" to
    Buckeye Yard, via the Miami Lead, overhead trackage rights on the NS
    assigned east track of the CR Columbus Line from CP 138 to the vicinity of
    MP 133.5 (point of new NS connection), overhead trackage rights on CR Auburn
    Connection from "CP Camp" to "CP 139," and overhead trackage rights on NS
    from Bannon to the south (RR east) end of NS Watkins Yard (connection with
    Watkins-Parsons transfer track).

- -   Youngstown (Center St.) - Ashtabula Harbor, OH: CSXT overhead trackage
    rights on CR Youngstown Line to access Ashtabula Harbor facilities.

- -   Osborn Crossing - Streator, IL: Overhead trackage rights on CR Kankakee
    Line, Kankakee Secondary and Streator Secondary for up to 8 total trains/day
    to connect with, or with trackage of other intersecting railroads. CSXT
    trains over the above limits are subject to negotiations between CSXT and NS
    for CSXT contribution to investment needed for additional capacity.


NORTHEAST CORRIDOR

- -   See Northeast Corridor in Exhibit A, III.


                                       12
<PAGE>   26
CR RIGHTS ON CSXT TRANSFERRED TO CSXT

- -   Carleton, MI to Alexis, MI

INTERIM

- -   Berea, OH - Chicago (63rd St.): Overhead haulage on CR's Chicago Line for
    maximum of 6 merchandise and/or intermodal trains/day each way, until CR's
    Ft. Wayne Line (Ft. Wayne-Chicago now NS) is upgraded, up to a maximum of 3
    years.

OTHER

All other CR rights that are part of, relate to, or connect with Routes, Assets
Related to Routes, and Facilities assigned to CSXT will be considered
appurtenant and will be assigned to CSXT, unless otherwise assigned in this
agreement, including Exhibit A.

Unless otherwise provided herein, or in the Definitive Documentation, a trackage
rights tenant shall only have the right to enter on and exit from the trackage
rights lines at points other than the endpoints where the tenant may make a
connection with its existing railroad line and joint CSXT/NS lines ("Point of
Permitted Entry or Exit").

If, in the opinion of the tenant, a new or upgraded connection is required at a
Point of Permitted Entry or Exit other than the endpoints, or, if in the opinion
of the tenant, other upgrading, including but not limited to switches, power
switches, signals, communications, etc., is required for operational efficiency,
the landlord will, subject to its own operational needs, cooperate and the
tenant will be responsible for funding that construction/upgrading at actual
cost or a cost mutually agreed to by CSXT and NS.

The Definitive Documentation will include agreements with terms and conditions
customary in the industry for trackage rights and haulage.

Where a tenant has access to 2-to-1 points via trackage rights, the tenant may
at its option access the points via haulage.

Unless a contrary intent appears from this Agreement including Exhibit A, or
from the Definitive Documentation, existing Conrail trackage rights over CSXT
will be assigned to NS and existing Conrail trackage rights over NS will be
assigned to CSXT.


                                       13
<PAGE>   27
                           TRACKAGE RIGHTS AND HAULAGE

NS RIGHTS ON CSXT

PERMANENT

- -   Muncie - Indianapolis (area). Overhead trackage rights on CR's Indianapolis
    Line to serve 2-to-1 shippers/shortlines in Indianapolis plus the GM metal
    fabrication plant.

- -   Lafayette - Indianapolis (area): Overhead trackage rights on CSXT's
    Lafayette - Crawfordsville, IN line to serve 2-to-1 shippers at
    Crawfordsville, IN and overhead trackage rights on CR's
    Crawfordsville-Indianapolis line to serve 2-to-1 shippers/shortlines in
    Indianapolis plus the GM metal fabrication plant.

- -   Buffalo (CP 437) - Niagara Falls (Suspension Bridge): Overhead trackage
    rights on CR's Belt Line Branch and Niagara Branch to connect with, or with
    trackage of Canadian carriers at Suspension Bridge.

- -   Philadelphia(Park Jct.) - Anacostia Jct., MD: Inherits CR's overhead
    trackage rights on CSXT.

- -   Landover - RO (Alexandria, VA): Overhead trackage rights on CR's Landover
    Line.

- -   Toledo, OH: Inherits CR's overhead trackage rights on CSXT-controlled
    portion of former Toledo Terminal RR.

- -   Cleveland, OH: Overhead trackage rights on CR's Short Line from Quaker to
    Berea, OH. Overhead trackage rights on CR's Chicago Line from CP 181 to
    Collinwood Yard for purposes of interchange with CSXT.

- -   Crestline, OH - Fort Wayne (Mike), IN: Overhead trackage rights on CR's Fort
    Wayne Line (Ft. Wayne-Chicago now NS), with train limits as follows:

            - 8 total trains/day between Crestline and Bucyrus
            - 6 total trains/day between Bucyrus and Fort Wayne including rights
              to serve 2-1 customers at Upper Sandusky.
    NS trains over the above limits are subject to negotiations between CSXT and
    NS for NS contribution to CSXT investment needed for additional capacity. NS
    will [supervise the] dispatch[ing] of the Ft. Wayne to Crestline line until
    CSXT haulage over CR Chicago Line between Berea and Chicago is terminated.
    NS will control the Bucyrus interlocking permanently.


                                       14
<PAGE>   28
- -   Fort Wayne(Mike), IN - Chicago(Buff/Hick), IL: Overhead trackage rights on
    former CR Fort Wayne Line, with 10 total train/day limit (limit does not
    apply in Fort Wayne terminal). NS trains over the above limits are subject
    to negotiations between CSXT and NS for NS contribution to CSXT investment
    needed for additional capacity. NS will dispatch the line until CSXT haulage
    over CR Chicago Line between Berea and Chicago is terminated.

- -   Porter - Ivanhoe, IN: Overhead trackage rights on CR's Porter Branch.

- -   Columbus, OH: Overhead trackage rights on CR Buckeye Line from "CP Hocking"
    to "CP 138," overhead trackage rights on CR Western Branch from Scioto to
    "CP Mounds," including the Mounds Connection, overhead trackage rights on
    Buckeye Yard Lead from "CP Buckeye" to "CP Darby," overhead trackage rights
    on the CSXT assigned west track of the CR Columbus Line from "CP 138" to the
    vicinity of Milepost 133.5 (point of new NS connection), and overhead
    trackage rights on CSXT between the south end of Parsons Yard (connection
    with Watkins-Parsons transfer track) and Scioto.

- -   Philadelphia: Overhead trackage rights on CR Harrisburg and Trenton Lines
    from Field to Belmont.

- -   Lima to Sidney, OH: Overhead trackage rights on CSXT Toledo Subdivision to
    serve 2-to-1 customers at Sidney.

NORTHEAST CORRIDOR

- -   See Northeast Corridor in Exhibit A, III.

INTERIM

- -   Bound Brook, NJ - Woodbourne, PA: Overhead trackage rights for 12 total
    train/day limit on CR's Trenton Line for dimensional trains until Pattenburg
    Tunnel on CR's Lehigh line is cleared of dimensional restrictions, not to
    exceed three years.

CR RIGHTS ON NS TRANSFERRED TO NS

- -   Carol, IL to Keensburg, IL
- -   Mill-Crescentville, OH

OTHER

All other CR rights that are part of, relate to, or connect with Routes, Assets
Related to Routes or Facilities assigned to NS will be considered appurtenant
and will be assigned to NS, unless otherwise assigned in this Agreement,
including Exhibit A.


                                       15
<PAGE>   29
Unless otherwise provided herein, or in the Definitive Documentation, a trackage
rights tenant shall only have the right to enter on and exit from the trackage
rights lines at points other than the endpoints where the tenant may make a
connection with its existing railroad line and joint NS/CSXT lines ("Point of
Permitted Entry or Exit").

If, in the opinion of the tenant, a new or upgraded connection is required at a
Point of Permitted Entry or Exit other than the endpoints, or, if in the opinion
of the tenant, other upgrading, including but not limited to switches, power
switches, signals, communications, etc., is required for operational efficiency,
the landlord will, subject to its own operational needs, cooperate and the
tenant will be responsible for funding that construction/upgrading at actual
cost or a cost mutually agreed to by CSXT and NS.

The Definitive Documentation will include agreements with terms and conditions
customary in the industry for trackage rights and haulage.

Where a tenant has access to 2-to-1 points via trackage rights, the tenant may
at its option access the points via haulage.

Unless a contrary intent appears from this Agreement including Exhibit A, or
from the Definitive Documentation, existing Conrail trackage rights over CSXT
will be assigned to NS and existing Conrail trackage rights over NS will be
assigned to CSXT.


                                       16
<PAGE>   30
                            CONRAIL LINE ALLOCATION

All trackage is not listed herein. Lines listed include main line routes,
primary branch lines and other lines which may need clarification. Lines pertain
to acquired ownership or where identified (TR) to assumed present CR freight
rights. Customer access is attributed to the acquiror of the line on which the
customer is located. Trackage not specifically listed is to be acquired by the
owner/acquirer of the route/line to which it connects. Clarification to customer
access shall be driven by assumptions used in traffic modeling exercise "SCR2"
used to arrive at the Percentage. City Detail (Exhibit A.III) and accompanying
maps will govern in terminal areas

                                    EXHIBIT #

<TABLE>
<CAPTION>
      Primary Route And Extension Acquisitions             Segmt            From

CSX Acquisitions
<S>                                                        <C>                                 <C>
      NY/NJ to Cleveland - NYC Route & Extensions             1   North NJ Terminal              NJ        
                                                              1   Poughkeepsie                   NY
                                                              1   New York City                  NY
                                                              1   Selkirk/Albany Term.           NY
                                                              1   Selkirk                        NY
                                                              2   Selkirk/Albany Term.           NY
                                                              3   Syracuse                       NY
                                                              4   Buffalo                        NY
                                                              5   Ashtabula                      OH
                                                             40   Boston                         MA
                                                             41   Syracuse                       NY
                                                             41   Adirondack Jct.                PQ
                                                             41   Woodard                        NY
                                                             41   Syracuse                       NY
                                                             41   Hawk                           NY
                                                             42   Buffalo Terminal               NY
                                                             42   Lockport                       NY
                                                             94   Syracuse                       NY
                                                            165   Selkirk/Boston Line            MA
                                                            165   Selkirk/Boston Line            MA
                                                            166   New York City                  NY
                                                            166   Connecticut Branch Lines
                                                            166   Connecticut Branch Lines
                                                              3   Churchville                    NY
                                                              3   Mortimer                       NY
                                                              3   Rochester Branch               NY

      Crestline to Chicago - PRR Route & Extensions          17   Crestline                      OH
                                                             18   Dunkirk                        OH
                                                    From NS  19   Fort Wayne                     IN
                                                    From NS  20   Warsaw                         IN
                                                             18   Adams                          IN

      Berea to E. St. Louis Route & Extensions               21   Cleveland Terminal             OH
                                                            122   Crestline                      OH
                                                             22   Galion                         OH
                                                             23   Ridgeway                       OH
                                                             24   Indianapolis                   IN
                                                             25   Terre Haute                    IN
                                                             26   Effingham                      IL
                                                             27   St. Elmo                       IL
                                                             27   Anderson                       IN
                                                             55   Columbus                       OH
                                                             83   Terre Haute                    IN
                                                            151   Danville                       IL
                                                             99   Indianapolis                   IN
                                                            100   Indianapolis                   IN
                                                            154   Indianapolis                   IN
                                                            105   HN Cabin                       IL
                                                            106   St. Elmo                       IL
                                                             98   Terre Haute                    IN
                                                             28   Muncie (Walnut Street)         IN
                                                             28   New Castle RT                  IN

      Columbus to Toledo Route & Extensions                  53   Columbus                       OH
                                                             52   Ridgeway                       OH
                                                             51   Blanchard                      OH
                                                             51   Toledo Terminal                OH
                                                             51   Toledo Terminal                OH

      Bowie to Woodzell, MD                                  90   Bowie                          MD
                                                             90   Brandywine                     MD

</TABLE> 

<PAGE>   31

<TABLE>
<CAPTION>
      Primary Route And Extension Acquisitions                        To

CSX Acquisitions
<S>                                                          <C>                            <C>    <C>
      NY/NJ to Cleveland - NYC Route & Extensions            Selkirk/Albany Term.           NY
                                                             New York City                  NY     TR
                                                             White Plains                   NY     TR

                                                             Poughkeepsie                   NY
                                                             Syracuse                       NY
                                                             Buffalo                        NY
                                                             Ashtabula                      OH
                                                             Cleveland Terminal             OH
                                                             Selkirk/Albany Term.           NY
                                                             Adirondack Jct.                PQ
                                                             Montreal (St. Luc)             PQ     TR
                                                             Oswego                         NY
                                                             Hawk                           NY
                                                             Port of Oswego                 NY     TR
                                                             Niagra Falls/Lockport          NY
                                                             West Somerset                  NY     TR
                                                             NYSW/FL Connections            NY
                                                             MA Branch Lines                MA
                                                             MA Branch Lines                MA     TR
                                                             Connecticut Branch Lines              TR

                                                                                                   TR
                                                             Wayneport                      NY
                                                             Avon                           NY


      Crestline to Chicago - PRR Route & Extensions          Dunkirk                        OH
                                                             Fort Wayne                     IN
                                                    From NS  Warsaw                         IN
                                                    From NS  Chicago Terminal (Clarke Jct.) IN
                                                             Decatur                        IN

      Berea to E. St. Louis Route & Extensions               Crestline                      OH
                                                             Galion                         OH
                                                             Ridgeway                       OH
                                                             Indianapolis                   IN
                                                             Terre Haute                    IN
                                                             Effingham                      IL
                                                             St. Elmo                       IL
                                                             E. St. Louis                   IL
                                                             Emporia                        IN
                                                             Galion                         OH
                                                             Danville                       IL
                                                             Olin                           IN
                                                             Rock Island                    IN
                                                             Crawfordsville/Bringhurst      IN
                                                             Shelbyville                    IN
                                                             Valley Jct.                    IL
                                                             Salem                          IL     TR
                                                             Beehunter                      IN     TR
                                                             New Castle RT                  IN     TR


      Columbus to Toledo Route & Extensions                  Ridgeway                       OH
                                                             Blanchard                      OH
                                                             Toledo Terminal                OH
                                                             Woodville                      OH
                                                             Stonyridge                     OH

      Bowie to Woodzell, MD                                  Morgantown                     MD
                                                             Chalk Point                    MD

</TABLE>


Confidential                       4/8/97                                 Page 1





<PAGE>   32
                            CONRAIL LINE ALLOCATION

                                   EXHIBIT #


<TABLE>
<CAPTION>
      Primary Route And Extension Acquisitions              Segmt               From                                

CSX Acquisitions

<S>                                                         <C>       <C>                            <C>   
      NY/NJ to Philadelphia (West Trenton Line)             182       Philadelphia                   PA

      Washington, DC to Landover, MD                         33       Washington (RO)                DC

      Quakertown Branch                                     130       Philadelphia Terminal          PA

      Chicago Area                                          192       Porter                         IN   
</TABLE>


<PAGE>   33
                            CONRAIL LINE ALLOCATION

                                   EXHIBIT #


<TABLE>
<CAPTION>
      Primary Route And Extension Acquisitions              Segmt               To                                
                                                      
<S>                                                         <C>         <C>                       <C>   
NY/NJ to Philadelphia (West Trenton Line)                    182         North NJ Terminal         NJ

Washington, DC to Landover, MD                                33         Landover                  MD

Quakertown Branch                                            130         Quakertown                PA     TR





</TABLE>

Confidential                       4/8/97                                 Page 2

<PAGE>   34

                            CONRAIL LINE ALLOCATION

                                    EXHIBIT #

<TABLE>
<CAPTION>
      Primary Route And Extension Acquisitions              Segmt       From

NS Acquisitions
<S>                                                          <C>  <C>
      NJ Terminal to Crestline - PRR Route & Extensions      10   North NJ Terminal
                                                             10   Somerville
                                                             10   Little Falls
                                                             10   Orange
                                                             10   Dover
                                                             10   Rockport
                                                             10   Phillipsburg
                                                             10   Allentown Terminal
                                                            186   Orange
                                                            170   North Jersey Terminal
                                                            182   Bound Brook
                                                             11   Allentown
                                                             12   Reading
                                                             12   Harrisburg Terminal
                                                             13   Harrisburg
                                                             13   Conemaugh Line
                                                             13   Pittsburgh
                                                             13   Central City
                                                             13   Pittsburgh Terminal
                                                             13   Monongahela
                                                             14   Pittsburgh Terminal
                                                             14   Pittsburgh
                                                             14   Salem
                                                             14   Beaver Falls
                                                             15   Alliance
                                                            120   Mantua
                                                             16   Alliance
                                                            114   Alliance
                                                            114   Rochester
                                                            114   E. Steubenville
                                                           1114   Steubenville Branches, Bridge
                                                            114   Pittsburgh Branches
                                                             45   Ashtabula
                                                            162   Ashtabula Harbor
                                                             46   Niles
                                                             46   Alliance
                                                             48   Youngstown
                                                             87   Allentown
                                                                  CP  Harris
                                                                  Cloe
                                                                  Tyrone

      Cleveland to Chicago - NYC Water Level Route            6   Cleveland Terminal
                                                              6   Elyria
                                                            159   Toledo Terminal
                                                              7   Toledo Terminal
                                                            107   Elkhart
                                                              8   Elkhart

      Philadelphia to Washington (NEC) Route & Extensions    31   Philadelphia Terminal
                                                             31   Wilmington Terminal
                                                             32   Perryville
                                                             32   Baltimore Terminal
                                                             33   Balt. BayView
                                                             33   Baltimore Terminal
                                                             33   Baltimore
                                                             34   Pocomoke
                                                             34   Harrington
                                                            131   Newark

      Michigan Operations (Excluding Joint Detroit Area)     50   Toledo Terminal
                                                             60   Detroit Terminal
                                                             61   Jackson
                                                             62   Kalamazoo
                                                             70   Jackson
                                                             71   Kalamazoo
                                                            156   Kalamazoo

      Eastern PA Lines & Extensions                          37   Philadelphia Terminal
                                                             37   Reading Terminal
                                                             37   Thorndale
                                                            136   Leola/Chesterbrook PA Lines
</TABLE>

<PAGE>   35
<TABLE>
<CAPTION>
      Primary Route And Extension Acquisitions                           To

NS Acquisitions
<S>                                                         <C>   <C>                            <C>
      NJ Terminal to Crestline - PRR Route & Extensions     NJ    Somerville                     NJ
                                                            NJ    Allentown                      PA
                                                            NJ    Dover                          NJ     TR
                                                            NJ    Denville                       NJ     TR
                                                            NJ    Rockport                       NJ     TR
                                                            NJ    Phillipsburg                   NJ
                                                            PA    E. Stroudsburg                 PA

                                                            NJ    North Jersey Terminal          NJ     TR
                                                            NJ    Little Falls                   NJ     TR
                                                            NJ    Ludlow                         NJ     TR
                                                            PA    Reading                        PA
                                                            PA    Harrisburg                     PA
                                                            PA
                                                            PA    Pittsburgh                     PA
                                                                  via Saltsburg                  PA
                                                            PA    W. Brownsville                 PA
                                                            PA    South Fork                     PA
                                                            PA
                                                            PA    Marianna                       PA
                                                            PA
                                                            PA    Salem                          OH
                                                            OH    Alliance                       OH
                                                            PA    Wampum                         PA
                                                            OH    Cleveland Terminal             OH
                                                            OH    Cleveland Terminal             OH
                                                            OH    Crestline                      OH
                                                            OH    Omal                           OH
                                                            PA    Yellow Creek                   OH
                                                            WV    Weirton                        WV
                                                                                                 OH

                                                            OH    Youngstown                     OH
                                                            OH    Ashtabula                      OH
                                                            OH    Latimer                        OH
                                                            OH    Youngstown                     OH
                                                            OH    Rochester                      PA
                                                            PA    Hazelton                       PA
                                                            PA    Cloe                           PA     TR
                                                            PA    Shelocta                       PA
                                                            PA    Lock Haven                     PA     TR

      Cleveland to Chicago - NYC Water Level Route          OH    Toledo Terminal                OH
                                                            OH    Lorain                         OH
                                                            OH    Sylvania                       OH
                                                            OH    Goshen                         IN
                                                            IN    Goshen                         IN
                                                            IN    Porter                         IN

      Philadelphia to Washington (NEC) Route & Extensions   PA    Perryville                     MD     TR
                                                            DE
                                                            MD    Baltimore                      MD     TR
                                                            MD
                                                            MD    Landover                       MD     TR
                                                            MD
                                                            MD    Cockeysville                   MD
                                                            MD    New Castle Jct                 DE
                                                            DE    Frankford/Indian River         DE
                                                            DE    Porter                         DE

      Michigan Operations (Excluding Joint Detroit Area)    OH    Detroit Terminal               MI
                                                            MI    Jackson                        MI
                                                            MI    Kalamazoo                      MI
                                                            MI    Elkhart                        IN
                                                            MI    Lansing                        MI
                                                            MI    Grand Rapids                   MI
                                                            MI    Porter                         IN     TR

      Eastern PA Lines & Extensions                         PA    Reading                        PA

                                                            PA    Woodbourne                     PA
                                                                                                 PA
</TABLE>


Confidential                        4/8/97                                Page 3





<PAGE>   36

                            CONRAIL LINE ALLOCATION

                                    EXHIBIT #
<TABLE>
<CAPTION>
      Primary Route And Extension Acquisitions              Segmt       From

NS Acquisitions
<S>                                                          <C>  <C>
                                                            137   Philadelphia PA Terminal
                                                            111   Lancaster
                                                            112   Lancaster

      Indiana Lines & Extensions                             84   Anderson
                                                             85   Warsaw
                                                            163   Marion

      Buffalo to NY/NJ Terminal Route & Extensions           44   NJ/NY Jct.
                                                             44   Suffern
                                                             44   Port Jervis
                                                             44   Binghamton
                                                             44   NJ/NY Jct.
                                                             44   Paterson Jct.
                                                             38   Waverly
                                                             88   Waverly
                                                             89   Sayre
                                                             93   Lyons
                                                             95   Corning
                                                            171   North Jersey Terminal
                                                            171   Paterson  Jct.
                                                            171   NJ/NY Jct.

      Buffalo to Harrisburg and South                        35   Perryville
                                                             35   Carlisle
                                                             35   Wago
                                                             35   Harrisburg
                                                             36   Williamsport
                                                             39   Harrisburg
                                                             39   Watsontown
                                                              4   Ebenezer Jct.
                                                             91   Hornell
                                                             91   Corry
                                                             91   Youngstown

      Cincinnati, OH to Columbus, OH to Charleston, WV       54   Columbus
                                                             54   Cincinnati Terminal

                                                             56   Columbus Terminal
                                                             57   Truro
                                                            150   Charleston
                                                            150   Charleston

      Chicago South/Illinois Operations                     193   Gibson
                                                            193   Hartsdale
                                                             82   Hartsdale
                                                             81   Schneider
                                                             97   Keensburg
                                                            152   Schneider
                                                             80   Danville

      Chicago Market                                        194   Western Ave Operations/Loop
                                                            195   Chicago
                                                            196   Clarke Jct.
                                                            196   CP 509
                                                            197   Buff
</TABLE>
<PAGE>   37
<TABLE>
<CAPTION>
      Primary Route And Extension Acquisitions                           To

NS Acquisitions
<S>                                                         <C>   <C>                            <C>
                                                                  Lancaster                      PA     TR
                                                            PA    Royalton                       PA     TR
                                                            PA    Lititz/Columbia                PA

      Indiana Lines & Extensions                            IN    Warsaw                         IN
                                                            IN    Goshen                         IN
                                                            IN    Red Key                        IN

      Buffalo to NY/NJ Terminal Route & Extensions          NJ    Suffern                        NY     TR
                                                            NY    Port Jervis                    NY
                                                            NY    Binghamton                     NY
                                                            NY    Waverly                        NY
                                                            NJ    Spring Valley                  NY     TR
                                                            NJ    Ridgewood                      NJ     TR
                                                            NY    Buffalo                        NY
                                                            NY    Mehoopany                      PA
                                                            PA    Ludlowville                    NY
                                                            NY    Himrods Jct                    NY
                                                            NY    Himrods Jct                    NY
                                                            NJ    Paterson Jct                   NJ     TR
                                                            NJ    North Newark                   NJ
                                                            NJ    North Jersey Terminal          NJ     TR

      Buffalo to Harrisburg and South                       MD    Harrisburg                     PA
                                                            PA    Harrisburg                     PA
                                                            PA    York (area)                    PA
                                                            PA    Shocks                         PA
                                                            MD    Harrisburg                     PA
                                                            PA    Buffalo                        NY
                                                            PA    Strawberry Ridge               PA
                                                            NY    Lackawanna                     NY
                                                            NY    Corry                          PA
                                                            PA    Erie                           PA     TR
                                                            OH    Oil City                       PA

      Cincinnati, OH to Columbus, OH to Charleston, WV      OH    Cincinnati                     OH
                                                            OH

                                                            OH    Truro                          OH
                                                            OH    Charleston                     WV
                                                            WV    Cornelia                       WV
                                                            WV    Morris Fork                    WV

      Chicago South/Illinois Operations                     IN    Hartsdale                      IN
                                                            IN    Chicago Heights                IL
                                                            IN    Schneider                      IN
                                                            IN    Hennepin                       IL
                                                            IL    Carol                          IL
                                                            IN    Wheatfield                     IN
                                                            IL    Pekin/Peoria                   IL

      Chicago Market                                              Cicero/Elsdon                  IL
                                                            IL    Grand Crossing                 IL
                                                            IN    Grand Crossing                 IL
                                                            IL    Calumet Park                   IL
                                                            IN    Porter                         IN
</TABLE>

Confidential                       4/8/97                                 Page 4






<PAGE>   38
                                    Map Index

<TABLE>
<CAPTION>
NUMBER      LOCATION                                          DATE

<S>         <C>                                              <C>
1           Buffalo                                          4/8/97
                                                             
2           Chicago Area                                     4/8/97
                                                             
3           Cleveland                                        4/8/97
                                                             
4           Columbus, OH                                     4/8/97
                                                             
5           Detroit - Ownership and Commercial Limits        4/8/97
                                                             
6           Detroit - Dispatching Only                       4/8/97
                                                             
7           Fort Wayne                                       4/8/97
                                                             
8           Indianapolis                                     4/8/97
                                                             
9           North Jersey Terminal - Commercial Limits        4/8/97
                                                             
10          North Jersey Terminal - Ownership Limits         4/8/97
                                                             
11          Philadelphia - Ownership/Control (2 pages)       4/8/97
                                                             
12          Philadelphia - Commercial Limits                 4/8/97
                                                             
13          Toledo, OH                                       4/8/97
                                                             
14          Washington, DC                                   4/8/97
                                                             
15          Conrail System Map                               4/8/97
</TABLE>







<PAGE>   39
[Map No. 1: This is a map dated 4/8/97 showing railroad locations in and around
Buffalo, New York. It indicates by colored lines the specific rail lines and
other rail facilities assigned to NS and CSX, respectively, consistent with the
narrative descriptions and the line segment information included in Exhibit A.]


[Map No. 2: This is a map entitled "C.R./I.H.B. Terminal Map", dated 4/8/97,
which shows railroad locations in and around the Chicago area. It indicates by
colored lines the specific rail lines (including trackage rights) and other rail
facilities assigned to NS and CSX, respectively, in and around Chicago, IL, and
Gary, IN., consistent with the narrative descriptions and the line segment
information included in Exhibit A.]


[Map No. 3: This is a map entitled "Cleveland (No Scale)" which shows railroad
locations in and around Cleveland, Ohio. It indicates by colored lines the
specific CR rail lines (including trackage rights) and other CR rail facilities
assigned to NS and CSX, respectively, in and around Cleveland, OH, consistent
with the narrative descriptions and the line segment information included in
Exhibit A. It also indicates existing CSX and NS rail lines.]


[Map No. 4: This is a map dated 4/8/97 which shows railroad routes and locations
in and around Columbus, Ohio. It indicates by colored lines the specific CR rail
lines (including trackage rights) and other CR rail facilities assigned to NS
and CSX, respectively, in and around Columbus, OH, consistent with the narrative
descriptions and the line segment information included in Exhibit A.]


[Map No. 5: This is a map entitled "Detroit (No Scale)", dated 4/8/97, which
shows railroad locations in and around Detroit, Michigan. It indicates by
colored lines (a) the specific CR rail lines (including trackage rights) and
other CR rail facilities assigned to NS and CSX, respectively, in and around
Detroit, MI, (b) the existing CSX and NS rail lines, and (c) the CR rail lines
to be operated as "joint" terminal lines, consistent with the
<PAGE>   40
                                       2


narrative descriptions and the line segment information included in Exhibit A.]


[Map No. 6: This is a map dated 4/8/97 which shows railroad locations in and
around Detroit, Michigan. It indicates by colored lines the specific CR lines
and areas as to which NS, on the one hand, and a new joint terminal entity to be
operated for the benefit of both NS and CSX, on the other hand, will handle
train dispatching functions, consistent with the narrative descriptions and the
line segment information included in Exhibit A.]


[Map No. 7: This is a map entitled "Map IN-8b FORT WAYNE", dated 4/8/97, which
shows railroad locations in and around Fort Wayne, Indiana. It indicates by
colored lines those rail lines and areas that are to be reviewed by a joint
NS/CSX inspection team for improved operations and reduced conflicting
movements, consistent with the narrative descriptions and the
line segment information included in Exhibit A.]


[Map No. 8: This is a circular map dated 4/8/97 which shows railroad locations
in and around Indianapolis, Indiana. It indicates by colored lines (a) the
specific CR rail lines (including trackage rights) and other CR rail facilities
assigned to NS and CSX, respectively, in and around Indianapolis, IN, and (b)
the existing CSX rail lines,consistent with the narrative descriptions and the
line segment information included in Exhibit A.]


[Map No. 9: This is a map dated 4/8/97 which shows railroad locations in the
northern New Jersey area. It indicates by colored lines the commercial limits of
the rail lines and routes in northern New Jersey assigned to NS, those assigned
to CSX and those which are to operated jointly for the benefit of both NS and
CSX, consistent with the narrative descriptions and the line segment information
included in Exhibit A.]


[Map No. 10: This is a map entitled "NJ/NY Joint Terminal Area (Enlarged)",
dated 4/8/97, which shows railroad locations in the northern New Jersey area. It
indicates by colored lines (a) the specific CR rail lines and other CR rail
facilities assigned to NS and CSX, respectively, in northern New Jersey, and (b)
the CR rail lines and routes to be operated as "joint terminal" lines,
<PAGE>   41
                                       3


consistent with the narrative descriptions and the line segment information
included in Exhibit A.]


[Map No. 11: This is a map consisting of two pages entitled "Philadelphia
(Ownership/Control)", dated 4/8/97, which shows railroad locations in and around
Philadelphia, Pennsylvania and southern New Jersey. Consistent with the
narrative descriptions and the line segment information included in Exhibit A,
this map indicates by colored lines (a) the specific CR rail lines and other CR
rail facilities assigned to NS and CSX, respectively, in the Philadelphia area,
(b) the CR rail lines and routes to be operated as "joint terminal" lines, and
(c) the CR rail lines which are to be operated as "joint terminal" lines but as
to which CSX will control dispatching functions.]


[Map No. 12: This is a map entitled "Philadelphia (Joint Commercial)", dated
4/8/97, which shows railroad locations in and around Philadelphia, Pennsylvania
and southern New Jersey. Consistent with the narrative descriptions and the line
segment information included in Exhibit A, this map indicates by colored lines
the commercial access relating to (a) the specific CR rail lines and other CR
rail facilities assigned to NS and CSX, respectively, in the Philadelphia area
and (b) the CR rail lines and routes to be operated as "joint terminal" lines.]


[Map No. 13: This is a map dated 4/8/97 which shows railroad locations in and
around Toledo, Ohio. Consistent with the narrative descriptions and the line
segment information included in Exhibit A, this map indicates by colored lines
(a) the specific CR rail lines and other CR rail facilities assigned to NS and
CSX, respectively, in the Toledo area, (b) the existing CSX and NS rail lines in
and around Toledo, and (c) existing trackage rights in favor of NS on the Ann
Arbor Railroad.]


[Map No. 14: This is a map entitled "Washington D.C. (No Scale)", dated 4/8/97,
which shows railroad locations in and around Washington, D.C. Consistent with
the narrative descriptions and the line segment information included in Exhibit
A, this map indicates by colored lines (a) the specific CR rail
<PAGE>   42
                                       4


lines and other CR rail facilities assigned to CSX in the Washington area, (b)
the existing NS and CSX rail lines and routes, (c) NS trackage rights (existing
and new) on CSX lines, and (d) CSX and NS trackage rights on Amtrak's Northeast
Corridor route.]


[Map No. 15: This is a map of the northeastern part of the United States dated
4/8/97 which shows the rail lines comprising CR's railroad system network.
Consistent with the narrative descriptions and the line segment information
included in Exhibit A, this map indicates by colored lines (a) the CR rail lines
and routes allocated to CSX, (b) the CR rail lines and routes allocated to NS,
and (c) the CR rail lines and routes that are be operated jointly for the
benefit of both CSX and NS.]

<PAGE>   1
                                                                 EXHIBIT (c)(15)



                                FOURTH AMENDMENT



                                       TO



                          AGREEMENT AND PLAN OF MERGER



                                  BY AND AMONG



                                 CONRAIL INC.,

                          A PENNSYLVANIA CORPORATION,



                            GREEN ACQUISITION CORP.,

                          A PENNSYLVANIA CORPORATION,


                                      AND


                                CSX CORPORATION,

                            A VIRGINIA CORPORATION,





                           DATED AS OF APRIL 8, 1997.
<PAGE>   2
                 FOURTH AMENDMENT TO AGREEMENT AND PLAN OF MERGER, dated as of
April 8, 1997 (this "Fourth Amendment"), by and among CONRAIL INC., a
Pennsylvania corporation ("Green"), GREEN ACQUISITION CORP., a Pennsylvania
corporation and a wholly owned subsidiary of White ("Tender Sub"), and CSX
CORPORATION, a Virginia corporation ("White").


                                  WITNESSETH:

                 WHEREAS, Green, Tender Sub and White have entered into an
Agreement and Plan of Merger, dated as of October 14, 1996 (the "October 14
Merger Agreement");

                 WHEREAS, Green, Tender Sub and White have entered into a First
Amendment to the October 14 Merger Agreement, dated as of November 5, 1996 (the
"First Amendment"), a Second Amendment to the October 14 Merger Agreement,
dated as of December 18, 1996 (the "Second Amendment"), and a Third Amendment
to the October 14 Merger Agreement, dated as of March 7, 1997 (the "Third
Amendment"), pursuant to which White, Green and Tender Sub have made certain
amendments to the October 14 Merger Agreement (the October 14 Merger Agreement,
as amended by the First Amendment, the Second Amendment and the Third
Amendment, the "Merger Agreement");

                 WHEREAS, White is entering into a letter agreement (the "NSC
Agreement") with Norfolk Southern Corporation ("NSC") as contemplated by
Section 4.3 of the Merger Agreement, pursuant to which certain amendments will
be made to the Amended Second Offer including the addition of NSC as a
co-bidder (as so amended, the "White/NSC Offer");

                 WHEREAS, as contemplated by Section 4.3 of the Merger
Agreement, Green, Tender Sub and White desire to make certain amendments to the
Merger Agreement, as set forth herein;

                 WHEREAS, the Board of Directors of Green has approved, and
deems it advisable and in the best interests of Green to enter into, this
Fourth Amendment;

                 WHEREAS, the respective Boards of Directors of Tender Sub and
White have approved, and deem it advisable and in the best interests of their
respective shareholders to enter into, this Fourth Amendment;

                 WHEREAS, except as amended by this Fourth Amendment, the
Merger Agreement shall remain in full force and effect; and





<PAGE>   3
                 WHEREAS, capitalized terms used herein and not defined herein
shall have the respective meanings given in the Merger Agreement;

                 NOW, THEREFORE, in consideration of the representations,
warranties, covenants and agreements contained in this Fourth Amendment, the
parties, intending to be legally bound, agree as follows:


                                   ARTICLE I

                 SECTION 1.  The following is hereby added to the end of
Section 1.2 of the Merger Agreement:

                 (m) Green hereby approves of and consents to the White/NSC 
         Offer and represents that its Board of Directors, at a meeting duly
         called and held, has by the vote of all directors present (i)
         determined that this Agreement, as amended by the Fourth Amendment,
         dated as of April 8, 1997, to this Agreement (the "Fourth Amendment"),
         and the transactions contemplated hereby (including the White/NSC Offer
         and the Merger), are in the best interests of Green, (ii) approved this
         Agreement, as amended by the Fourth Amendment, and the transactions
         contemplated hereby (including the White/NSC Offer and the Merger),
         such determination and approval constituting approval thereof by the
         Board of Directors for all purposes of the Pennsylvania Law, and (iii)
         resolved to recommend that the shareholders of Green accept the
         White/NSC Offer and tender their shares of Green Common Stock or Green
         ESOP Preferred Stock thereunder to Tender Sub and that all shareholders
         of Green approve and adopt this Agreement, as amended by the Fourth
         Amendment, and the transactions contemplated hereby; provided, however,
         that prior to the purchase by Tender Sub of shares of Green Common
         Stock and Green ESOP Preferred Stock pursuant to the White/NSC Offer,
         Green may modify, withdraw or change such recommendation, but only to
         the extent that Green complies with Section 4.2 hereof.  Green hereby
         consents to the inclusion in amendments to the Amended Second Offer
         Documents of the recommendations of Green's Board of Directors
         described in this Section.    

                 SECTION 2.  Section 1.3 of the Merger Agreement is hereby
deleted and replaced in its entirety with the following:

                 SECTION 1.3.  The Merger.  Upon the terms and subject to the
         conditions set forth in this Agreement, and
   




                                         -2-
<PAGE>   4
         in accordance with the Pennsylvania Business Corporation Law of 1988,
         as amended (the "Pennsylvania Law"), Green Merger Corp., a wholly
         owned Pennsylvania subsidiary of Tender Sub ("Merger Sub"), shall be
         merged with and into Green at the Effective Time (the "Merger").
         Green shall be the surviving corporation (the "Surviving Corporation")
         of the Merger and shall succeed to and assume all rights and
         obligations of Merger Sub in accordance with the Pennsylvania Law.

         SECTION 3.  Section 1.7(a) of the Merger Agreement is hereby deleted
and replaced in its entirety with the following:

                 (a)  The articles of incorporation and by-laws of Merger Sub,
         as in effect immediately prior to the Effective Time, shall be the
         articles of incorporation and by-laws, respectively, of the Surviving
         Corporation until thereafter changed or amended as provided therein or
         by applicable law, provided that the articles of incorporation of the
         Surviving Corporation shall provide that the Surviving Corporation
         shall be named "Conrail Inc."

         SECTION 4.  Section 1.9 of the Merger Agreement is hereby deleted and
replaced in its entirety with the following:

                 SECTION 1.9.  Voting Trust.  The parties agree that,
         simultaneously with the purchase by White, Tender Sub or their
         affiliates of shares of Green Common Stock and Green ESOP Preferred
         Stock pursuant to the Amended Second Offer, the Green Stock Option
         Agreement or otherwise, such shares of Green Common Stock (including
         pursuant to the automatic conversion of Green ESOP Preferred Stock)
         shall be deposited in a voting trust (the "Voting Trust") in
         accordance with the terms and conditions of a voting trust agreement
         substantially in the form attached as Exhibit E hereto (the "Voting
         Trust Agreement").  Subject to applicable law and to the rules,
         regulations and practices of the Surface Transportation Board, the
         Voting Trust may be modified or amended, and other voting trusts may
         be employed with respect to Green Common Stock, at any time by White
         in its sole discretion (provided that the terms of the Voting Trust
         governing the voting of or transfer or disposition of Green Common
         Stock shall not be amended prior to the consummation of the Amended
         Second Offer without Green's consent and provided further that Green
         hereby consents to the adoption of a voting trust agreement
         substantially in the form attached to the Fourth Amendment hereto as
         Exhibit E-1, such voting trust agreement
                               




                                         -3-
<PAGE>   5
         not to be effective prior to the consummation of the Amended Second
         Offer without Green's consent).

                 SECTION 5.  Section 2.1(a) of the Merger Agreement is hereby
deleted and replaced in its entirety with the following:

                 (a)  Each share of Common Stock, par value $1.00 per share, of
         Merger Sub issued and outstanding immediately prior to the Effective
         Time shall, at the Effective Time, by virtue of the Merger and without
         any action on the part of any person, become one duly authorized,
         validly issued, fully paid and nonassessable share of common stock of
         the Surviving Corporation.

                 SECTION 6.  Sections 3.1(l) and (n)(A) of the Merger Agreement
are hereby deleted and replaced in their entirety with the following:

                 (l)  State Takeover Statutes.  Other than with respect to
         Subchapter E (Control Transactions) of Chapter 25 of the Pennsylvania
         Law ("Subchapter E"), the Board of Directors of Green has taken all
         action necessary or advisable so as to render inoperative with respect
         to the transactions contemplated hereby (including the Offer, the
         Amended Second Offer, the White/NSC Offer, the Merger and the
         execution, delivery and performance of the transactions contemplated
         by the NSC Agreement) or by the Green Stock Option Agreement or the
         NSC Agreement all applicable state anti-takeover statutes.

                 (n) Green Rights Agreement and By-laws.  (A)  The Green Rights
         Agreement has been amended (collectively, the "Green Rights Plan
         Amendment") to (i) render the Green Rights Agreement inapplicable to
         the Offer, the Amended Second Offer, the White/NSC Offer, the Merger
         and the other transactions contemplated by this Agreement, the Green
         Stock Option Agreement and the NSC Agreement and (ii) ensure that (y)
         neither White nor any of its controlled subsidiaries nor NSC nor any
         of its controlled subsidiaries nor any other entity formed for the
         purpose of acquiring Green wholly owned by White and NSC is an
         Acquiring Person (as defined in the Green Rights Agreement) pursuant
         to the Green Rights Agreement and (z) a Shares Acquisition Date,
         Distribution Date or Trigger Event (in each case as defined in the
         Green Rights Agreement) does not occur by reason of the approval,
         execution or delivery of this Agreement, the Green Stock Option
         Agreement or the NSC Agreement, or the consummation of the Offer, the
         Amended Second





                                         -4-
<PAGE>   6
         Offer, the White/NSC Offer or the Merger or the consummation of the
         other transactions contemplated by this Agreement, the Green Stock
         Option Agreement or the NSC Agreement, and the Green Rights Agreement
         may not be further amended by Green without the prior consent of White
         in its sole discretion.

                 SECTION 7.  The following is hereby added immediately prior to
the end of Section 4.1(a)(i) of the Merger Agreement: "and provided further,
however, that, notwithstanding the foregoing or anything to the contrary
contained herein, following the date of the Third Amendment Green's Board of
Directors shall not declare, and Green shall not pay, any dividend on Green's
capital stock with a record date on or prior to May 30, 1997".

                 SECTION 8.  The following is hereby added to the end of
Section 5.1 of the Merger Agreement:  "Green shall not take any action to
change the date set for its 1997 Annual Meeting from December 19, 1997 without
the prior consent of White in its sole discretion."

                 SECTION 9.  Section 5.4 of the Merger Agreement is hereby
amended to grant to NSC and any entity formed for the purpose of acquiring
Green wholly owned by White and NSC the access and information granted
thereunder to the same extent as White and its officers, employees and
representatives, subject to each such person's agreement to be bound by the
obligations provided therein and under the Confidentiality Agreement.

                 SECTION 10.  Section 5.5(c) is hereby deleted and replaced in
its entirety with the following:

                      (c) In connection with and without limiting the
         foregoing, Green shall (i) take all action necessary to ensure that no
         state anti-takeover statute or similar statute or regulation is or
         becomes operative with respect to the Offer, the Merger, this
         Agreement, the Green Option Agreement, the NSC Agreement or any of the
         transactions contemplated by this Agreement, the NSC Agreement or the
         Green Option Agreement and (ii) if any state anti-takeover statute or
         similar statute or regulation is or becomes operative with respect to
         the Offer, the Merger, this Agreement, the Green Option Agreement, the
         NSC Agreement or any transaction contemplated by this Agreement, the
         NSC Agreement or the Green Option Agreement, take all action necessary
         to ensure that the Offer, the Amended Second Offer, the White/NSC
         Offer, the Merger and the other transactions contemplated by this
         Agreement, the NSC Agreement and the Green Option Agreement may be
         consummated as





                                         -5-
<PAGE>   7
         promptly as practicable on the terms contemplated by this Agreement,
         the NSC Agreement and the Green Option Agreement and otherwise to
         minimize the effect of such statute or regulation on the Merger and
         the other transactions contemplated by this Agreement, the NSC
         Agreement and the Green Option Agreement.

                 SECTION 11.  Section 5.14 of the Merger Agreement is hereby
deleted and replaced in its entirety with the following:

                 SECTION 5.14. Green Rights Agreement.  The Board of Directors
         of Green shall take all further action (in addition to that referred
         to in Section 3.1(n)) reasonably requested in writing by White
         (including redeeming the Green Rights immediately prior to the
         Effective Time or amending the Green Rights Agreement) in order to
         render the Green Rights inapplicable to the Offer, the Amended Second
         Offer, the White/NSC Offer, the Merger and the other transactions
         contemplated by this Agreement, the Green Stock Option Agreement and
         the NSC Agreement.  Except as provided above with respect to the
         Offer, the Merger and the other transactions contemplated by this
         Agreement, the Green Stock Option Agreement and the NSC Agreement, the
         Board of Directors of Green shall not (a) amend the Green Rights
         Agreement or (b) take any action with respect to, or make any
         determination under, the Green Rights Agreement, including a
         redemption of the Green Rights or any action to facilitate a Takeover
         Proposal in respect of Green.

                 SECTION 12.  The following is hereby added to Section 5.13 of
the Merger Agreement following the word "proceeding":  "(including to effect a
dismissal with prejudice)".

                 SECTION 13.  Notwithstanding anything to the contrary
contained in this Fourth Amendment, nothing in the NSC Agreement, the
Definitive Documentation (as defined in the NSC Agreement) or any other
agreement, arrangement or understanding between White and NSC shall affect the
rights and obligations of Green or White under the Merger Agreement, as amended
by this Fourth Amendment (including Attachment A to the Green Disclosure
Schedule dated as of March 7, 1997).

                 SECTION 14.  The term "Merger Agreement" or "this Agreement"
as used in the Merger Agreement shall be deemed to refer to the Merger
Agreement as amended through and including the Fourth Amendment (provided that
the terms "date hereof" or "date of this Agreement" as used in the Merger
Agreement shall mean October 14, 1996); the terms "Offer" or "Amended Second
Offer" as used in the Merger Agreement shall be deemed to include the White/NSC
Offer;





                                         -6-
<PAGE>   8
and the term "transactions contemplated by this Agreement" or "transactions
contemplated hereby", for purposes of Section 3.1(d) of the Merger Agreement,
shall be deemed to include the transactions contemplated by the NSC Agreement
(including the execution and delivery thereof) and, for all purposes under the
Merger Agreement, shall be deemed to include any purchases of shares of Green
Common Stock under this Agreement or the NSC Agreement by White or any of its
controlled subsidiaries, NSC or any of its controlled subsidiaries or any other
entity formed for the purpose of acquiring Green wholly owned by White and NSC
pursuant to Subchapter E as a result of such transactions.


                                   ARTICLE II

                                    GENERAL

                 SECTION 1.  Merger Agreement.  Except as amended hereby, the
provisions of the Merger Agreement shall remain in full force and effect.

                 SECTION 2.  Counterparts.  This Fourth Amendment may be
executed in one or more counterparts, all of which shall be considered one and
the same agreement and shall become effective when one or more counterparts
have been signed by each of the parties and delivered to the other parties.

                 SECTION 3.  Entire Agreement; No Third-Party Beneficiaries.
Other than the Merger Agreement (and subject to Section 8.6 thereof), this
Fourth Amendment (a) constitutes the entire agreement, and supersedes all prior
agreements and understandings, both written and oral, among the parties with
respect to the subject matter of this Fourth Amendment and (b) is not intended
to confer upon any person other than the parties hereto any rights or remedies
other than upon NSC and any entity formed for the purpose of acquiring the
Company wholly owned by CSX and NSC, in any case to the extent of Section
1.2(m), Section 3.1(l), Section 3.1(n)(A), the last sentence of Section 5.1,
Section 5.4, Section 5.5(c) and Section 5.14 of the Merger Agreement.

                 SECTION 4.  GOVERNING LAW.  THIS FOURTH AMENDMENT SHALL BE
GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW
YORK, REGARDLESS OF THE LAWS THAT MIGHT OTHERWISE GOVERN UNDER APPLICABLE
PRINCIPLES OF CONFLICT OF LAWS THEREOF; PROVIDED, HOWEVER, THAT THE LAWS OF THE
RESPECTIVE STATES OF INCORPORATION OF EACH OF THE PARTIES HERETO SHALL GOVERN
THE RELATIVE RIGHTS, OBLIGATIONS, POWERS, DUTIES AND OTHER INTERNAL AFFAIRS OF
SUCH PARTY AND ITS BOARD OF DIRECTORS.





                                         -7-
<PAGE>   9
                 SECTION 5.  Assignment.  Neither this Fourth Amendment nor any
of the rights, interests or obligations under this Fourth Amendment shall be
assigned, in whole or in part, by operation of law or otherwise by either of
the parties hereto without the prior written consent of the other party.  Any
assignment in violation of the preceding sentence shall be void.  Subject to
the preceding sentence, this Fourth Amendment will be binding upon, inure to
the benefit of, and be enforceable by, the parties and their respective
successors and assigns.

                 SECTION 6.  ENFORCEMENT.  THE PARTIES AGREE THAT IRREPARABLE
DAMAGE WOULD OCCUR AND THAT THE PARTIES WOULD NOT HAVE ANY ADEQUATE REMEDY AT
LAW IN THE EVENT THAT ANY OF THE PROVISIONS OF THIS FOURTH AMENDMENT WERE NOT
PERFORMED IN ACCORDANCE WITH THEIR SPECIFIC TERMS OR WERE OTHERWISE BREACHED.
IT IS ACCORDINGLY AGREED THAT THE PARTIES SHALL BE ENTITLED TO AN INJUNCTION OR
INJUNCTIONS TO PREVENT BREACHES OF THIS FOURTH AMENDMENT AND TO ENFORCE
SPECIFICALLY THE TERMS AND PROVISIONS OF THIS FOURTH AMENDMENT IN ANY FEDERAL
COURT LOCATED IN THE STATE OF NEW YORK OR IN NEW YORK STATE COURT, THIS BEING
IN ADDITION TO ANY OTHER REMEDY TO WHICH THEY ARE ENTITLED AT LAW OR IN EQUITY.
IN ADDITION, EACH OF THE PARTIES HERETO (A) CONSENTS TO SUBMIT ITSELF TO THE
PERSONAL JURISDICTION OF ANY FEDERAL COURT LOCATED IN THE STATE OF NEW YORK OR
ANY NEW YORK STATE COURT IN THE EVENT ANY DISPUTE ARISES OUT OF THIS FOURTH
AMENDMENT OR ANY OF THE TRANSACTIONS CONTEMPLATED BY THIS FOURTH AMENDMENT, (B)
AGREES THAT IT WILL NOT ATTEMPT TO DENY OR DEFEAT SUCH PERSONAL JURISDICTION BY
MOTION OR OTHER REQUEST FOR LEAVE FROM ANY SUCH COURT AND (C) AGREES THAT IT
WILL NOT BRING ANY ACTION RELATING TO THIS FOURTH AMENDMENT OR ANY OF THE
TRANSACTIONS CONTEMPLATED BY THIS FOURTH AMENDMENT IN ANY COURT OTHER THAN A
FEDERAL COURT SITTING IN THE STATE OF NEW YORK OR A NEW YORK STATE COURT.

                 SECTION 7.  Headings.  The headings contained in this Fourth
Amendment are for reference purposes only and shall not affect in any way the
meaning or interpretation of this Fourth Amendment.

                 SECTION 8.  Severability.  If any term or other provision of
this Fourth Amendment is invalid, illegal or incapable of being enforced by any
rule of law or public policy, all other conditions and provisions of this
Fourth Amendment shall nevertheless remain in full force and effect so long as
the economic or legal substance of the transactions contemplated hereby is not
affected in any manner materially adverse to any party.  Upon such
determination that any term or other provision is invalid, illegal or incapable
of being enforced, the parties hereto shall negotiate in good faith to modify
this Fourth Amendment so as to effect the original intent of the parties as
closely as possible to the fullest extent permitted by applicable law in an
acceptable manner to the end that the transactions contemplated hereby are
fulfilled to the extent possible.





                                         -8-
<PAGE>   10
                 IN WITNESS WHEREOF, Conrail Inc., Green Acquisition Corp. and
CSX Corporation have caused this Fourth Amendment to be signed by their
respective officers thereunto duly authorized, all as of the date first written
above.

                                  CONRAIL INC.

                                  by

                                                              
                                  ----------------------------
                                  Name:
                                  Title:


                                  GREEN ACQUISITION CORP.

                                  by

                                                              
                                  ----------------------------
                                  Name:
                                  Title:


                                  CSX CORPORATION

                                  by

                                                              
                                  ----------------------------
                                  Name:
                                  Title:





                                         -9-
<PAGE>   11
                                                                     Exhibit E-1


                  AMENDED AND RESTATED VOTING TRUST AGREEMENT

                 THIS AMENDED AND RESTATED VOTING TRUST AGREEMENT, dated as of
April __, 1997, by and among CSX Corporation, a Virginia corporation
("Parent"), Norfolk Southern Corporation, a Virginia corporation ("NSC"),
_______________ LLC, a limited liability company organized under the laws of
_______________ ("LLC"), and Green Acquisition Corp., a Pennsylvania
corporation ("Acquiror"), and Deposit Guaranty National Bank, a national
banking association (the "Trustee"),

                              W I T N E S S E T H:


                 WHEREAS, Parent, Acquiror and Conrail Inc., a Pennsylvania
corporation (the "Company"), have entered into an Agreement and Plan of Merger,
dated as of October 14, 1996 (as it has been and may be amended from time to
time, the "Merger Agreement"; capitalized terms used but not defined herein
shall have the meanings set forth therein), pursuant to which (i) Acquiror was
to commence and did commence the Offer, the Second Offer and the White/NSC
Offer (all as defined in the Merger Agreement) for shares of Common Stock of
the Company (all such shares accepted for payment pursuant to the Tender Offer
or otherwise received, acquired or purchased by or on behalf of Parent or
Acquiror, including pursuant to the Option Agreement, the "Acquired Shares"),
and (ii) a subsidiary of Acquiror will merge into the Company pursuant to the
Merger.
<PAGE>   12
                                     - 2 -


                 WHEREAS, Parent, Acquiror and the Trustee have entered into a
Voting Trust Agreement, dated as of October 15, 1996 (the "Original Voting
Trust Agreement");

                 WHEREAS, Parent, Acquiror and the Company have entered into a
First Amendment to the Merger Agreement dated November 5, 1996, a Second
Amendment thereto dated December 18, 1996, a Third Amendment thereto dated
March 7, 1997, and a Fourth Amendment thereto dated April, 1997;

                 WHEREAS, 17,775,125 shares of Common Stock of the Company,
which were acquired pursuant to the Offer, are being held in the Original
Voting Trust, and trust certificates with respect to such shares have been
issued to Acquiror;

                 WHEREAS, as authorized by the Third Amendment and the Fourth
Amendment to the Merger Agreement referred to above, Parent and Norfolk
Southern Corporation have entered into a letter agreement dated as of April __,
1997 (together with any further agreements between CSX and NSC made pursuant to
its terms, and as it or such other agreement may be amended from time to time,
the "CSX/NS Agreement"), under which, among other things, NSC and Parent have
jointly formed LLC, in which each will have an ownership interest and each will
have equal voting rights, and under which each of them will make contributions
to LLC, including the contribution of all of the stock of Acquiror by Parent to
LLC;

                 WHEREAS, under the CSX/NS Agreement, NSC proposes, effective
upon the consummation of the White/NSC Offer, to cause its subsidiary, Atlantic
Acquisition Corporation, a Pennsylvania corporation ("Atlantic") to cause
8,200,000 shares of Common Stock to be transferred from a voting trust
currently governed by an "Amended and Restated Voting Trust Agreement" dated
<PAGE>   13
                                     - 3 -

as of February 10, 1997, as Amended and Restated as of February 18, 1997, to
which NSC, Atlantic and First American National Bank are parties, to the
Trustee hereunder, to be held as Trust Stock hereunder.

                 WHEREAS, Parent and Acquiror wish (and are obligated pursuant
to the Merger Agreement), simultaneously with the acceptance for payment of
Acquired Shares pursuant to the Tender Offer (including the White/NSC Offer),
the Merger, or otherwise to deposit such Shares of Common Stock in an
independent, irrevocable voting trust, pursuant to the rules of the Surface
Transportation Board (the "STB"), in order to avoid any allegation or assertion
that the Parent or the Acquiror is controlling or has the power to control the
Company prior to the receipt of any required STB approval or exemption;

                 WHEREAS, Parent, Acquiror and the Trustee wish to amend the
Original Voting Trust Agreement to reflect the CSX/NS Agreement [(and no
consent of the Company is necessary to effect such amendment),] [(and the
Company has consented to such amendment)] and to add as parties to the Original
Voting Trust Agreement NSC and LLC, and Parent, Acquiror, NSC, LLC and the
Trustee wish to further restate the Voting Trust Agreement as so amended;

                 WHEREAS, the parties intend that, prior to the authorization
and approval of the STB, neither Parent, NSC, LLC nor Acquiror nor any of their
affiliates shall control the Company and the Company shall not have as a
director any officer, director, nominee or representative of the Parent, the
Acquiror or any of their affiliates;

                 WHEREAS, the holder of all outstanding Trust Certificates has
assented to such amendment of the Original Voting Trust Agreement, and all
requirements for the amendment of the Original Voting Trust Agreement contained
therein have been satisfied;
<PAGE>   14
                                     - 4 -

                 WHEREAS, this Amended and Restated Voting Trust Agreement
(hereinafter, this "Trust Agreement") shall be binding on the parties from and
after its execution, but shall become effective only as set forth in Paragraph
24 hereof;

                 WHEREAS, neither the Trustee nor any of its affiliates has any
officers or board members in common or any direct or indirect business
arrangements or dealings (as described in Paragraph 9 hereof) with the Parent,
the Acquiror, NSC or LLC or any of their affiliates; and

                 WHEREAS, the Trustee is willing to continue to act as voting
trustee pursuant to the terms of this Trust Agreement and the rules of the STB.

                 NOW THEREFORE, the parties hereto agree as follows:

                 1.  CREATION OF TRUST -- The Parent, the Acquiror, NSC and LLC
hereby appoint Deposit Guaranty National Bank as Trustee hereunder, and Deposit
Guaranty National Bank hereby accepts said appointment and agrees to act as
Trustee under this Trust Agreement as provided herein.

                 2.  TRUST IS IRREVOCABLE -- This Trust Agreement and the
nomination of the Trustee during the term of the trust shall be irrevocable by
the Parent, the Acquiror, NSC and LLC and their affiliates and shall terminate
only in accordance with, and to the extent of, the provisions of Paragraphs 8
and 14 hereof.

                 3.  DEPOSIT OF TRUST STOCK -- The Parent, the Acquiror, NSC
and LLC agree that, simultaneously with acceptance of Acquired Shares purchased
pursuant to the White/NSC Offer, the Acquiror will direct the depositary for
the White/NSC Offer to transfer to the Trustee any such Acquired Shares
purchased pursuant to the White/NSC Offer.  The Parent, the Acquiror, NSC and
LLC also
<PAGE>   15
                                     - 5 -


agree that simultaneously with receipt, acquisition or purchase of any
additional shares of Common Stock by either of them, directly or indirectly, or
by any of their affiliates, they will transfer to the Trustee the certificate
or certificates for such shares.  NSC agrees that upon the consummation of the
White/NSC Offer it will cause Atlantic to transfer, or to cause to be
transferred, certificates for the 8,200,000 shares of Common Stock currently
held by First American National Bank as voting trustee to the Trustee.  All
17,775,125 shares of Common Stock which have been deposited with the Trustee
and are being held under the Original Voting Trust Agreement shall continue to
be held under this Voting Trust Agreement.  The Parent, the Acquiror, NSC and
LLC also agree that simultaneously with the receipt by them or by any of their
affiliates of any shares of common stock or other voting stock of the Company
upon the effectiveness of the Merger, they will transfer to the Trustee the
certificate or certificates for such shares.  All such certificates shall be
duly endorsed or accompanied by proper instruments duly executed for transfer
thereof to the Trustee or otherwise validly and properly transferred, and shall
be exchanged for one or more Voting Trust Certificates substantially in the
form attached hereto as Exhibit A (the "Trust Certificates"), with the blanks
therein appropriately filled in and with such Trust Certificates to be issued
in the name of the Acquiror.  Voting Trust Certificates executed in the form
attached to the Original Voting Trust Agreement as Exhibit A shall continue to
be valid and obligatory and shall, from and after the effectiveness of this
instrument, be deemed in every respect to be Trust Certificates executed and
delivered under this instrument.  All shares of Common Stock and all other
shares of common stock or other voting securities at any time delivered to the
Trustee hereunder are called the "Trust Stock."  The Trustee shall present to
the Company all certificates representing Trust Stock for
<PAGE>   16
                                     - 6 -


surrender and cancellation and for the issuance and delivery to the Trustee of
new certificates registered in the name of the Trustee or its nominee.

                 4.  POWERS OF TRUSTEE -- The Trustee shall be present, in
person or represented by proxy, at all annual and special meetings of
shareholders of the Company so that all Trust Stock may be counted for the
purposes of determining the presence of a quorum at such meetings.  Parent and
Acquiror agree, and the Trustee acknowledges, that the Trustee shall not
participate in or interfere with the management of the Company and shall take
no other actions with respect to the Company except in accordance with the
terms hereof.  The Trustee shall exercise all voting rights in respect of the
Trust Stock to approve and effect the Merger, and in favor of any proposal or
action necessary or desirable to effect, or consistent with the effectuation
of, the Parent, Acquiror's, NSC's and LLC's acquisition of the Company,
pursuant to the Merger Agreement and the CSX/NS Agreement, and without limiting
the generality of the foregoing, if there shall be with respect to the Board of
Directors of the Company an "Election Contest" as defined in the Proxy Rules of
the Securities and Exchange Commission ("SEC"), in which one slate of nominees
shall support the effectuation of the Merger and the transactions contemplated
by the CSX/NS Agreement and another slate oppose it, then the Trustee shall
vote in favor of the slate supporting the effectuation of the Merger and the
transactions contemplated by the CSX/NS Agreement.  In addition, for so long as
the Merger Agreement is in effect, the Trustee shall exercise all voting rights
in respect of the Trust Stock, to cause any other proposed merger, business
combination or similar transaction (including, without limitation, any
consolidation, sale or purchase of assets, reorganization, recapitalization,
liquidation or winding up of or by the Company) involving the Company, but not
involving both the Parent or one of its subsidiaries or affiliates
<PAGE>   17
                                     - 7 -


and NSC or one of its subsidiaries or affiliates (otherwise than in connection
with a disposition pursuant to Paragraph 8), not to be effected.  In addition,
the Trustee shall exercise all voting rights in respect of the Trust Stock in
favor of any proposal or action necessary or desirable to dispose of Trust
Stock in accordance with Paragraph 8 hereof.  Except as provided in the three
immediately preceding sentences, the Trustee shall vote all shares of Trust
Stock with respect to all matters, including without limitation the election or
removal of directors, voted on by the shareholders of the Company (whether at a
regular or special meeting or pursuant to a unanimous written consent) in the
same proportion as all shares of Common Stock (other than Trust Stock) are
voted with respect to such matters; provided that, except as provided in the
three immediately preceding sentences, from and after the effectiveness of the
Merger, the Trustee shall vote all shares of Trust Stock in accordance with the
instructions of a majority of the persons who are currently the directors of
the Company and their nominees as successors and who shall then be directors of
the Company, except that the Trustee shall not vote the Trust Stock in favor of
taking or doing any act which violates the Merger Agreement or would violate
the CSX/NS Agreement or impede its performance or which if taken or done prior
to the consummation of the Merger would have been a violation of the Merger
Agreement; and except further that if there shall be no such persons qualified
to give such instructions hereunder, or if a majority of such persons refuse or
fail to give such instructions, then the Trustee shall vote the Trust Stock in
its sole discretion, having due regard for the interests of the holders of
Trust Certificates as investors in the stock of the Company, determined without
reference to such holders' interests in railroads other than the subsidiaries
of the Company.  In exercising its voting rights in accordance with this
Paragraph 4, the Trustee shall
<PAGE>   18
                                     - 8 -


take such actions at all annual, special or other meetings of stockholders of
the Company or in connection with any and all consents of shareholders in lieu
of a meeting.

                 5.  FURTHER PROVISIONS CONCERNING VOTING OF TRUST STOCK -- The
Trustee shall be entitled and it shall be its duty to exercise any and all
voting rights in respect of the Trust Stock either in person or by proxy, as
herein provided (including without limitation Paragraphs 4 and 8(b) hereof),
unless otherwise directed by the STB or a court of competent jurisdiction.
Subject to Paragraph 4, the Trustee shall not exercise the voting powers of the
Trust Stock in any way so as to create any dependence or intercorporate
relationship between (i) any or all of the Parent, Acquiror, NSC, LLC and their
affiliates, on the one hand, and (ii) the Company or its affiliates, on the
other hand.  The term "affiliate" or "affiliates" wherever used in this Trust
Agreement shall have the meaning specified in Section 11323(c) of Title 49 of
the United States Code, as amended.  The Trustee shall not, without the prior
approval of the STB of such action, vote the Trust Stock to elect any officer,
director, nominee or representative of the Parent, the Acquiror, NSC or LLC or
their affiliates as an officer or director of the Company or of any affiliate
of the Company.  The Trustee shall be kept informed respecting the business
operations of the Company by means of the financial statements and other public
disclosure documents periodically filed by the Company and affiliates of the
Company with the SEC and the STB, and by means of information respecting the
Company contained in such statements and other documents filed by the Parent
with the SEC and the STB, copies of which shall be promptly furnished to the
Trustee by the Company or the Parent, as the case may be, and the Trustee shall
be fully protected in relying upon such information.  Notwithstanding the
foregoing provisions of this Paragraph 5 or any
<PAGE>   19
                                     - 9 -


other provision of this Agreement, however, the registered holder of any Trust
Certificate may at any time with the prior written approval of the Company --
but only with the prior written approval of the STB -- instruct the Trustee in
writing to vote the Trust Stock represented by such Trust Certificate in any
manner, in which case the Trustee shall vote such shares in accordance with
such instructions.

                 6.  TRANSFER OF TRUST CERTIFICATES -- The Trust Certificates
shall be transferable on the books of the Trustee by the registered holder upon
the surrender thereof properly assigned, in accordance with rules from time to
time established for that purpose by the Trustee.  Until so transferred, the
Trustee may treat the registered holder as owner for all purposes.  Each
transferee of a Trust Certificate issued hereunder shall, by his acceptance
thereof, assent to and become a party to this Trust Agreement, and shall assume
all attendant rights and obligations.  Any such transfer in violation of this
Paragraph 6 shall be null and void.  When this instrument becomes effective,
out of the Trust Certificates theretofore issued to Acquiror, a Trust
Certificate for 100 shares of Common Stock shall be transferred to Parent.

                 7.  DIVIDENDS AND DISTRIBUTIONS -- Pending the termination of
this Trust as hereinafter provided, the Trustee shall, immediately following
the receipt of each cash dividend or cash distribution as may be declared and
paid upon the Trust Stock, pay the same over to the Acquiror or to or as
directed by the holders of the Trust Certificates hereunder as then appearing
on the books of the Trustee (to the extent of their respective interests if the
Acquiror is not such holder).  The Trustee shall receive and hold dividends and
distributions other than cash upon the same terms and conditions as the Trust
Stock and shall issue Trust Certificates representing any new or additional
securities that may be paid as dividends or
<PAGE>   20
                                     - 10 -


otherwise distributed upon the Trust Stock to the registered holders of Trust
Certificates in proportion to their respective interests.

                 8.  DISPOSITION OF TRUST STOCK; TERMINATION OF TRUST -- (a)
This Trust is accepted by the Trustee subject to the right hereby reserved by
the holders of Trust Certificates at any time to direct the sale or other
disposition of the whole or any part of the Trust Stock represented by such
certificates, but only as permitted by subparagraph (e) below, whether or not
an event described in subparagraph (b) below has occurred.  The Trustee shall
take all actions reasonably requested by the holders of Trust Certificates
(including, without limitation, exercising all voting rights in respect of
Trust Stock) in favor of any proposal or action necessary or desirable to
effect, or consistent with the effectuation of or with respect to any proposed
sale or other disposition of the whole or any part of the Trust Stock by the
holders of Trust Certificates that is otherwise permitted pursuant to this
Paragraph 8, including, without limitation, in connection with the exercise of
any of its registration rights under any agreement with the Company.  The
Trustee shall be entitled to rely on a certification from any holder of Trust
Certificates, signed by its President or one of its Vice Presidents and under
its corporate seal (if a corporation), that a disposition of the whole or any
part of the Trust Stock represented by such certificates is being made in
accordance with the requirements of subparagraph (e) below.  In the event of a
permitted sale of Trust Stock by the Acquiror, the Trustee shall, to the extent
the consideration therefor is payable to or controllable by the Trustee,
promptly pay, or cause to be paid, upon the order of the Acquiror the net
proceeds of such sale to the registered holders of the Trust Certificates in
proportion to their respective interests.  It is the intention of this
Paragraph that no violation of 49 U.S.C. section 11323 will result from a
termination of this Trust.
<PAGE>   21
                                     - 11 -


                 (b)  In the event the STB Approval shall have been granted,
then immediately upon the direction of the holders of a majority in interest of
the Trust Certificates, and the delivery of a certified copy of such order of
the STB or other governmental authority with respect thereof, or, in the event
that Subtitle IV of Title 49 of the United States Code, or other controlling
law, is amended to allow the Acquiror, Parent and NSC or their affiliates to
acquire control of the Company without obtaining STB or other governmental
approval, upon delivery of an opinion of independent counsel selected by the
Trustee that no order of the STB or other governmental authority is required,
the Trustee shall either (x) transfer to or upon the order of the holder or
holders of Trust Certificates hereunder as then appearing on the records of
the Trustee, its right, title and interest in and to all of the Trust Stock
then held by it (or such portion as is represented by the Trust Certificates in
the case of such an order by less than all of such holders) in accordance with
the terms, conditions and agreements of this Trust Agreement and not
theretofore transferred by it as provided in subparagraph (a) hereof, or (y) if
shareholder approval has not previously been obtained for the Merger, vote the
Trust Stock in favor of the Merger, and upon any such transfer of all of the
Trust Stock, or any such merger following such STB approval or law amendment
permitting control without governmental approval, this Trust shall cease and
come to an end.

                 (c)  In the event that (i) the STB Approval shall not have
been obtained by December 31, 1998, or (ii) there shall have been an STB
Denial, Parent, NSC, Acquiror and LLC shall use their best efforts to sell the
Trust Stock during a period of two years after such date or STB Denial, or such
extension of that period as the STB shall approve.  Any such disposition shall
be subject to the requirements of subparagraph (e) below, and to any
jurisdiction of the STB to
<PAGE>   22
                                     - 12 -


oversee the divestiture of the Trust Stock.  At all times, the Trustee shall
continue to perform its duties under this Trust Agreement and, should Parent,
NSC, Acquiror and LLC be unsuccessful in their efforts to sell or distribute
the Trust Stock during the period referred to, the Trustee shall then as soon
as practicable, and subject to the requirements of subparagraph (e) below, sell
the Trust Stock for cash to eligible purchasers in such manner and for such
price as the Trustee in its discretion shall deem reasonable after consultation
with Parent, NSC, Acquiror and LLC.  (An "eligible purchaser" hereunder shall
be a person or entity that is not affiliated with Parent, NSC, Acquiror and LLC
and which has all necessary regulatory authority, if any, to purchase the Trust
Stock.)  Parent, NSC, Acquiror and LLC agree to cooperate with the Trustee in
effecting such disposition and the Trustee agrees to act in accordance with any
direction made collectively by Parent, NSC, Acquiror and LLC as to any specific
terms or method of disposition, to the extent not inconsistent with any of the
terms of this Trust Agreement, including subparagraph (e) below, and with the
requirements of the terms of any STB or court order.  The proceeds of the sale
shall be distributed to or upon the order of the holder or holders of the Trust
Certificates hereunder as then known to the Trustee.  The Trustee may, in its
reasonable discretion, require the surrender to it of the Trust Certificates
hereunder before paying to the holder its share of the proceeds.  Upon
disposition of all the Trust Stock pursuant to this paragraph 8(c), this Trust
shall cease and come to an end.

                 (d)  Unless sooner terminated pursuant to any other provision
herein contained, this Trust Agreement shall terminate on December 31, 2016,
and may be extended by the parties hereto, so long as no violation of 49 U.S.C.
section 11323 will result from such termination or extension.  All Trust Stock
and any other property held by the Trustee hereunder upon such termination
shall be distributed
<PAGE>   23
                                     - 13 -


to or upon the order of the holders of Trust Certificates.  The Trustee may, in
its reasonable discretion, require the surrender to it of the Trust
Certificates hereunder before the release or transfer of the stock interests
evidenced thereby.

                 (e)  Any disposition of Trust Stock under this paragraph 8 or
otherwise hereunder shall be made subject to any order of the STB pursuant to
any of its jurisdiction, and the Trustee shall be entitled to rely on a
certificate of Parent and NSC that any person or entity to whom the Trust Stock
is disposed is not an affiliate of the Parent or of NSC and has all necessary
regulatory authority, if any is necessary, to purchase such Trust Stock.  The
Trustee shall promptly inform the STB of any transfer or disposition of Trust
Stock pursuant to this Paragraph 8.  Upon the transfer of all of the Trust
Stock pursuant to this Paragraph 8, this Trust shall cease and come to an end.

                 (f)  Except as expressly provided in this Paragraph 8, the
Trustee shall not dispose of, or in any way encumber, the Trust Stock, and any
transfer, sale or encumbrance in violation of the foregoing shall be null and
void.

                 (g)  As used in this Paragraph 8 and elsewhere in this
Agreement, the terms "STB Approval" and "STB Denial" shall not have the
meanings given to them in the Merger Agreement but shall have the following
meanings:

                 "STB APPROVAL" means the issuance by the STB of a decision,
which decision shall become effective and which decision shall not have been
stayed or enjoined, that (A) constitutes a final agency action approving,
exempting or otherwise authorizing the acquisition of control over the
Company's railroad operations by Parent and NSC and the other transactions
contemplated by the CSX/NSC Agreement and (B) does not (1) change or disapprove
of the consideration to be given in the Merger or other material provisions of
Article II of the Merger Agreement or (2) unless Parent and NSC choose to
assume control
<PAGE>   24
                                     - 14 -


despite such conditions, impose on Parent, NSC, the Company or any of their
respective subsidiaries any other terms or conditions (including, without
limitation, labor protective provisions but excluding conditions heretofore
imposed by the Interstate Commerce Commission in New York Dock Railway--
Control--Brooklyn Eastern District, 360 I.C.C. 60 (1979)), other than those
proposed by the applicants, that materially and adversely affect the long-term
benefits expected to be received by Parent and NSC from the transactions
contemplated by the Merger Agreement and the CSX/NS Agreement.

                 "STB DENIAL" means (i) STB Approval shall not have been
obtained by December 31, 1998 or (ii) the STB shall have, by an order which
shall have become final and no longer subject to review by the courts, either
(x) refused to approve the control and other transactions which are referred to
in clause (A) of the definition of STB Approval or (y) approved such
acquisition of control and other transactions subject to conditions that cause
such approval not to constitute STB Approval.

                 9.  INDEPENDENCE OF THE TRUSTEE -- Neither the Trustee nor any
affiliate of the Trustee may have now, or at any time during the duration of
this Trust Agreement (i) any officers, or members of their respective boards of
directors, in common with the Acquiror, the Parent, NSC, LLC or any affiliate
of any of them, or (ii) any direct or indirect business arrangements or
dealings, financial or otherwise, with the Acquiror, the Parent, NSC, LLC or
any affiliate of either, other than dealings pertaining to the establishment
and carrying out of this voting trust.  Mere investment in the stock or
securities of NSC or the Parent or the Acquiror or any affiliate of any of them
by the Trustee, short of obtaining a controlling interest, will not be
considered a proscribed business arrangement or
<PAGE>   25
                                     - 15 -


dealing, but in no event shall any such investment by the Trustee in voting
securities of the Acquiror, the Parent, NSC, LLC or their affiliates exceed
five percent of their outstanding voting securities and in no event shall the
Trustee hold a proportion of such voting securities so substantial as to
permit the Trustee in any way to control or direct the affairs of the Acquiror,
the Parent, NSC, LLC or their affiliates.  Neither the Acquiror, the Parent,
NSC, LLC,  nor their affiliates shall purchase the stock or securities of the
Trustee or any affiliate of the Trustee.

                 10.  COMPENSATION OF THE TRUSTEE -- The Trustee shall be
entitled to receive reasonable and customary compensation for all services
rendered by it as Trustee under the terms hereof and said compensation to the
Trustee, together with all counsel fees, taxes, or other expenses reasonably
incurred hereunder, shall be promptly paid by the Acquiror or the Parent.

                 11.  TRUSTEE MAY ACT THROUGH AGENTS -- The Trustee may at any
time or from time to time appoint an agent or agents and may delegate to such
agent or agents the performance of any administrative duty of the Trustee.

                 12.  CONCERNING THE RESPONSIBILITIES AND INDEMNIFICATION OF
THE TRUSTEE -- The Trustee shall not be liable for any mistakes of fact or law
or any error of judgment, or for any act or omission, except as a result of the
Trustee's willful misconduct or gross negligence.  The Trustee shall not be
answerable for the default or misconduct of any agent or attorney appointed by
it in pursuance hereof if such agent or attorney has been selected with
reasonable care.  The duties and responsibilities of the Trustee shall be
limited to those expressly set forth in this Trust Agreement.  The Trustee
shall not be responsible for the sufficiency or the accuracy of the form,
execution, validity or genuineness of the Trust Stock, or of any documents
relating thereto, or for any lack of endorsement thereon, or for any
description therein, nor shall the Trustee be responsible or
<PAGE>   26
                                     - 16 -


liable in any respect on account of the identity, authority or rights of the
persons executing or delivering or purporting to execute or deliver any such
Trust Stock or document or endorsement or this Trust Agreement, except for the
execution and delivery of this Trust Agreement by this Trustee.  The Acquiror,
the Parent, NSC and LLC agree that they will at all times protect, indemnify
and save harmless the Trustee, its directors, officers, employees and agents
from any loss, cost or expense of any kind or character whatsoever in
connection with this Trust except those, if any, growing out of the gross
negligence or willful misconduct of the Trustee, and will at all times
themselves undertake, assume full responsibility for, and pay all costs and
expense of any suit or litigation of any character, including any proceedings
before the STB, with respect to the Trust Stock or this Trust Agreement, and if
the Trustee shall be made a party thereto, the Acquiror, the Parent, NSC or LLC
will pay all costs and expenses, including reasonable counsel fees, to which
the Trustee may be subject by reason thereof; provided, however, that the
Acquiror, the Parent, NSC and LLC shall not be responsible for the cost and
expense of any suit that the Trustee shall settle without first obtaining their
written consent.  The Trustee may consult with counsel and the opinion of such
counsel shall be full and complete authorization and protection in respect of
any action taken or omitted or suffered by the Trustee hereunder in good faith
and in accordance with such opinion.

                 13.  TRUSTEE TO GIVE ACCOUNT TO HOLDERS -- To the extent
requested to do so by the Acquiror or any registered holder of a Trust
Certificate, the Trustee shall furnish to the party making such request full
information with respect to (i) all property theretofore delivered to it as
Trustee, (ii) all property then held by it as Trustee, and (iii) all actions
theretofore taken by it as Trustee.
<PAGE>   27
                                     - 17 -


                 14.  RESIGNATION, SUCCESSION, DISQUALIFICATION OF TRUSTEE --
The Trustee, or any trustee hereafter appointed, may at any time resign by
giving forty-five days' written notice of resignation to the Parent, NSC and
the STB.  The Parent and NSC shall at least fifteen days prior to the effective
date of such notice appoint a successor trustee which shall (i) satisfy the
requirements of Paragraph 9 hereof and (ii) be a corporation organized and
doing business under the laws of the United States or of any State thereof and
authorized under such laws to exercise corporate trust powers, having a
combined capital and surplus of at least $50,000,000 and subject to supervision
or examination by federal or state authority.  If no successor trustee shall
have been appointed and shall have accepted appointment at least fifteen days
prior to the effective date of such notice of resignation, the resigning
Trustee may petition any competent authority or court of competent jurisdiction
for the appointment of a successor trustee.  Upon written assumption by the
successor trustee of the Trustee's powers and duties hereunder, a copy of the
instrument of assumption shall be delivered by the Trustee to the Parent,
Acquiror, NSC and LLC and the STB and all registered holders of Trust
Certificates shall be notified of its assumption, whereupon the Trustee shall
be discharged of the powers and duties of the Trustee hereunder and the
successor trustee shall become vested with such powers and duties.  In the
event of any material violation by the Trustee of the terms and conditions of
this Trust Agreement, the Trustee shall become disqualified from acting as
trustee hereunder as soon as a successor trustee shall have been selected in
the manner provided by this paragraph.

                 15.  AMENDMENT -- This Trust Agreement may from time to time
be modified or amended by agreement executed by the Trustee, the Acquiror, the
Parent, NSC and LLC and all registered holders of the Trust Certificates
<PAGE>   28
                                     - 18 -


(i) pursuant to an order of the STB, (ii) with the prior approval of the STB,
(iii) in order to comply with any order of the STB or (iv) upon receipt of an
opinion of counsel satisfactory to the Trustee and the holders of Trust
Certificates that an order of the STB approving such modification or amendment
is not required and that the amendment is consistent with the STB's regulations
regarding voting trusts.

                 16.  GOVERNING LAW; POWERS OF THE STB -- The provisions of
this Trust Agreement and the rights and obligations of the parties hereunder
shall be governed by the laws of the State of New York, except that to the
extent any provision hereof may be found inconsistent with subtitle IV, title
49, United States Code or regulations promulgated thereunder, such statute and
regulations shall control and such provision hereof shall be given effect only
to the extent permitted by such statute and regulations.  In the event that the
STB shall, at any time hereafter by final order, find that compliance with law
requires any other or different action by the Trustee than is provided herein,
the Trustee shall act in accordance with such final order instead of the
provisions of this Trust Agreement.

                 17.  COUNTERPARTS -- This Trust Agreement is executed in six
counterparts, each of which shall constitute an original, and one of which
shall be held by each of the Parent, the Acquiror, NSC and LLC, and the other
two shall be held by the Trustee, one of which shall be subject to inspection
by holders of Trust Certificates on reasonable notice during business hours.

                 18.  FILING WITH THE STB -- A copy of this Agreement and any
amendments or modifications thereto shall be filed with the STB by the
Acquiror.

                 19.  SUCCESSORS AND ASSIGNS -- This Trust Agreement shall be
binding upon the successors and assigns to the parties hereto, including
without limitation
<PAGE>   29
                                     - 19 -


successors to the Acquiror, the Parent, NSC or LLC by merger, consolidation or
otherwise.

                 20.  SUCCESSION OF FUNCTIONS -- The term "STB" includes any
successor agency or governmental department that is authorized to carry out the
responsibilities now carried out by the STB with respect to the consideration
of the consistency with the public interest of rail mergers and combinations,
the regulation of voting trusts in respect of the acquisition of securities of
rail carriers or companies controlling them, and the exemption of approved rail
mergers and combinations from the antitrust laws.

                 21.  NOTICES -- Any notice which any party hereto may give to
the other hereunder shall be in writing and shall be given by hand delivery, or
by first class registered mail, or by overnight courier service, or by
facsimile transmission confirmed by one of the aforesaid methods, sent,

                 If to Parent:

                 CSX Corporation
                 One James Center
                 901 East Cary Street
                 Richmond, Virginia  23219

                 Attention:  General Counsel

                 With a required copy to:

                 Dennis G. Lyons, Esq.
                 Arnold & Porter
                 555 Twelfth Street, N.W.
                 Washington, D.C.  20004-1202

                 If to NSC:

                 Norfolk Southern Corporation
                 Three Commercial Place
                 Norfolk, Virginia  23510-2191

                 Attention:  General Counsel
<PAGE>   30
                                     - 20 -


                 With a required copy to:

                 Richard A. Allen, Esq.
                 Zuckert, Scoutt & Rasenberger, L.L.P.
                 888 Seventeenth Street, N.W.
                 Suite 600
                 Washington, D.C.  20006-3939

                 If to LLC or to Acquiror, by sending such notice to each of
                 Parent and NSC at their addresses given in this paragraph 21
                 and with copies as there provided.

                 If to the Trustee, to:

                 Deposit Guaranty National Bank
                 One Deposit Guaranty Plaza,
                 8th Floor
                 Jackson, Mississippi  39201

                 Attention:  Corporate Trust Department

                 With a required copy to:

                 Deposit Guaranty National Bank
                 c/o Commercial National Bank In Shreveport
                 333 Texas Street
                 Shreveport, LA  71101

                 Attention:  Corporate Trust Department


And if to the holders of Trust Certificates, to them at their addresses as
shown on the records maintained by the Trustee.

                 22.  REMEDIES -- Each of the parties hereto acknowledges and
agrees that in the event of any breach of this Agreement, each non-breaching
party would be irreparably and immediately harmed and could not be made whole
by monetary damages.  It is accordingly agreed that the parties hereto (a) will
waive, in any action for specific performance, the defense of adequacy of a
remedy at law and (b) shall be entitled, in addition to any other remedy to
which they may be entitled at law or in equity, to an order compelling specific
performance of this Agreement in any action instituted in any state or federal
court sitting in New
<PAGE>   31
                                     - 21 -


York, New York.  Each party hereto consents to personal jurisdiction in any
such action brought in any state or federal court sitting in New York, New
York.

                 23.  CONCERNING THE HOLDERS OF TRUST CERTIFICATES -- Each
reference to the rights or powers of holders of the Trust Certificates as such
to give directions with respect to the disposition of the Trust Shares, or the
earnings or income thereon, or with respect to any other matter with respect to
the Trust Shares, if such rights or powers are exercised by fewer than all of
such holders or relate to fewer than all of them, shall be deemed to relate
only, as the case may be, to such rights or powers only to the extent of the
number of Trust Shares represented by the Trust Certificates of the holders
giving such instruction or direction.

                 24.  EFFECTIVENESS -- This Agreement shall be binding on the
parties hereto from and after its execution and delivery, but except as
specified in this Paragraph 24 none of the provisions hereof shall come into
effect until the time of consummation of the White/NSC Offer and only if the
CSX/NS Agreement shall remain in full force and effect at that time (but the
Trustee shall assume that it remains in full force and effect absent notice in
writing from either Parent or NS); and the shares of Common Stock acquired in
the White/NSC Offer shall be deposited in the Voting Trust as so governed by
this Amended and Restated Voting Trust Agreement upon its effectiveness; but
notwithstanding the foregoing provisions as to effectiveness, no amendment may
be made to the Voting Trust Agreement from and after the execution and delivery
of this Agreement which would cause this instrument not to come into effect as
provided in this Paragraph 24, or would in any manner impede its coming into
effect as contemplated by this Paragraph 24, as a complete amendment and
restatement of the Voting Trust Agreement.
<PAGE>   32
                                     - 22 -


                 IN WITNESS WHEREOF, CSX Corporation, Green Acquisition Corp.,
Norfolk Southern Corporation and _______ LLC have caused this Amended and
Restated Trust Agreement to be executed by their authorized officers and their
corporate seals to be affixed, attested by their Secretaries or Assistant
Secretaries, and Deposit Guaranty National Bank has caused this Amended and
Restated Trust Agreement to be executed by its authorized officer or agent and
its corporate seal to be affixed, attested to by its Secretary or one of its
Assistant Secretaries or other authorized agent, all as of the day and year
first above written.
                                        
Attest:                                 CSX CORPORATION


                                        By                             
- -----------------------------             ------------------------------------
Secretary

Attest:                                 GREEN ACQUISITION CORP.


                                        By                             
- -----------------------------             ------------------------------------
Secretary


Attest:                                 NORFOLK SOUTHERN CORPORATION


                                        By                             
- -----------------------------             ------------------------------------
Secretary
<PAGE>   33
                                     - 23 -


ATTEST:                                                                    LLC
                                        -----------------------------------

                                        By                             
- -----------------------------             ------------------------------------
Secretary


Attest:                                 DEPOSIT GUARANTY NATIONAL BANK


                                        By                          
- -----------------------------             ------------------------------------
<PAGE>   34
No.                                                                    EXHIBIT A
    ----------                                                            Shares
                                                                   -------
                                                                       
                            VOTING TRUST CERTIFICATE
                                      FOR
                                  COMMON STOCK
                                       of
                                  CONRAIL INC.
                         INCORPORATED UNDER THE LAWS OF
                           THE STATE OF PENNSYLVANIA

                 THIS IS TO CERTIFY that ________ will be entitled, on the
surrender of this Certificate, to receive on the termination of the Voting
Trust Agreement hereinafter referred to, or otherwise as provided in Paragraph
8 of said Voting Trust Agreement, a certificate or certificates for ________
shares of the Common Stock, $1.00 par value, of Conrail Inc., a Pennsylvania
corporation (the "Company").  This Certificate is issued pursuant to, and the
rights of the holder hereof are subject to and limited by, the terms of an
Amended and Restated Voting Trust Agreement, dated as of April __, 1997,
executed by CSX Corporation, a Virginia corporation, Norfolk Southern
Corporation, a Virginia corporation, ________ LLC, a limited liability company
organized under the laws of ________ ________, Green Acquisition Corp., a
Pennsylvania corporation, and Deposit Guaranty National Bank, as Trustee (as it
may be amended from time to time, the "Voting Trust Agreement"), a copy of
which Voting Trust Agreement is on file in the office of said Trustee at One
Deposit Guaranty Plaza, 8th Floor, Jackson, Mississippi 39201 and open to
inspection of any stockholder of the Company and the holder hereof.  The Voting
Trust Agreement, unless earlier terminated (or extended) pursuant to the terms
thereof, will terminate on December 31, 2016, so long as no violation of 49
U.S.C. section 11323 will result from such termination.
<PAGE>   35
                                     - 2 -


                 The holder of this Certificate shall be entitled to the
benefits of said Voting Trust Agreement, including the right to receive payment
equal to the cash dividends, if any, paid by the Company with respect to the
number of shares represented by this Certificate.

                 This Certificate shall be transferable only on the books of
the undersigned Trustee or any successor, to be kept by it, on surrender hereof
by the registered holder in person or by attorney duly authorized in accordance
with the provisions of said Voting Trust Agreement, and until so transferred,
the Trustee may treat the registered holder as the owner of this Voting Trust
Certificate for all purposes whatsoever, unaffected by any notice to the
contrary.

                 By accepting this Certificate, the holder hereof assents to
all the provisions of, and becomes a party to, said Voting Trust Agreement.

                 IN WITNESS WHEREOF, the Trustee has caused this Certificate to
be signed by its officer duly authorized.
                                        

Dated:                                  DEPOSIT GUARANTY NATIONAL BANK


                                        By                            
                                          --------------------------------------
                                                    Authorized Officer
<PAGE>   36
                                     - 3 -


                   [FORM OF BACK OF VOTING TRUST CERTIFICATE]


                 FOR VALUE RECEIVED ___________________ hereby sells, assigns,
and transfers unto ____________ the within Voting Trust Certificate and all
rights and interests represented thereby, and does hereby irrevocably
constitute and appoint ________ Attorney to transfer said Voting Trust
Certificate on the books of the within mentioned Trustee, with full power of
substitution in the premises.


                                              --------------------------------
Dated:

In the Presence of:



- ----------------------------------


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