1


                                                                       Exhibit 1



                       FIFTH AMENDMENT TO RIGHTS AGREEMENT

         AMENDMENT, dated as of June 2, 1999 (this "Amendment"), to the Rights
Agreement, dated as of January 19, 1996, as amended as of April 5, 1996, June
20, 1996, July 25, 1996 and August 22, 1997 (the "Rights Agreement"), between
MotivePower Industries, Inc., a Pennsylvania corporation (successor to
MotivePower Industries, Inc., a Delaware corporation)(the "Company"), and
ChaseMellon Shareholder Services, L.L.C., a New Jersey limited liability company
(formerly known as Chemical Mellon Shareholder Services, L.L.C.) (the "Rights
Agent").

         WHEREAS, at the close of business on June 2, 1999, MotivePower
Industries, Inc., a Delaware corporation ("Delaware Corp") was merged
("Reincorporation Merger") into the Company, pursuant to a Plan of Merger
whereby the Company succeeded to all the property, rights and obligations of
Delaware Corp Delaware Corp ceased to exist as a Delaware corporation, and each
outstanding share of Common Stock, par value $.01 per share, of Delaware Corp
(including shares held in the treasury) became and was converted into one share
of Common Stock, $.01 par value, of the Company;

         WHEREAS, the Company and the Rights Agent wish to amend the Rights
Agreement to reflect and confirm that the Company has succeeded to all of the
rights and obligations of Delaware Corp thereunder and to reflect and confirm
certain conforming changes therein;

         WHEREAS, the Company and Westinghouse Air Brake Company, a Delaware
corporation ("Westinghouse"), have proposed to enter into an Agreement and Plan
of Merger (the "Merger Agreement") pursuant to which, among other things,
Westinghouse will merge with and into the Company (the "Westinghouse Merger")
and each outstanding share of Common Stock, par value $0.01 per share, of the
Westinghouse will be converted into 1.3 shares of Common Stock of the Company;

         WHEREAS, the Company and the Rights Agent desire to (i) amend the
Rights Agreement to provide that Westinghouse shall not be deemed an Acquiring
Person and no Distribution Date (as such terms are defined in the Rights
Agreement) shall be deemed to occur as a result of the execution of the Merger
Agreement, the execution of the WABCO Stock Option Agreement, dated as of June
2, 1999, between Westinghouse and the Company or consummation of the
transactions contemplated thereby, and (ii) provide that Westinghouse Air Brake
Company Employee Ownership Trust shall not constitute an Acquiring Person after
consummation of the Westinghouse Merger;


   2

         WHEREAS, the Company and the Rights Agent desire to make certain
additional administrative changes to the Rights Agreement; and

         WHEREAS, pursuant to and in compliance with Section 27 of the Rights
Agreement, the Company and the Rights Agent desire to amend the Rights Agreement
as set forth in this Amendment.

         NOW THEREFORE, in consideration of the premises and the mutual
agreements set forth herein and in the Rights Agreement, the parties hereto
agree as follows:

         1. As of the time of the Reincorporation Merger, the Company succeeded
to all the rights and obligations of Delaware Corp under the Rights Agreement,
and replaced Delaware Corp as the "Company" under the Rights Agreement.

         2. As of the time of the Reincorporation Merger, each Right theretofore
issued by Delaware Corp, and which attached to a share of Common Stock of
Delaware Corp, became a Right, when exercisable, to purchase from the Company
one one-hundredth of a share of Series C Junior Participating Preferred Stock
("Preferred Stock") of the Company for $16, subject to the adjustment as
provided in the Rights Agreement, such Right being attached to the share of
Common Stock of the Company into which such share of Common Stock of Delaware
Corp has been converted.

         3. As of the time of the Reincorporation Merger, all references in the
Rights Agreement to Common Stock of Delaware Corp became references to the
Common Stock of the Company, all references to Series C Junior Participating
Preferred Stock of Delaware Corp became references to the Preferred Stock, and
all references to other securities of Delaware Corp became references to other
securities of the Company.

         4. One Right to purchase one one-hundredths of a share of Preferred
Stock (as such number may be adjusted pursuant to the Rights Agreement) of the
Company for $16, when exercisable and subject to adjustment as provided in the
Rights Agreement, shall be issued for and attach to each share of Common Stock
of the Company issued after the time of the Reincorporation Merger, whether an
originally issued share or a share delivered from the treasury to which a Right
had not previously attached, all in accordance with Section 3 of the Rights
Agreement.

         5. Section 31 of the Rights Agreement is hereby amended by substituting
"Commonwealth of Pennsylvania" for "State of Delaware."



                                       2
   3
         6. The first sentence of Section 1(a) of the Rights Agreement is hereby
amended and restated in its entirety as follows:

          "Acquiring Person" shall mean any Person (as such term is hereinafter
     defined) who or which, together with all Affiliates and Associates (as such
     terms are hereinafter defined) of such Person, shall be the Beneficial
     Owner (as such term is hereinafter defined) of 15% or more of the Common
     Shares of the Company then outstanding, but shall not include the Company,
     any Subsidiary (as such term is hereinafter defined) of the Company, any
     employee benefit plan of the Company or any Subsidiary of the Company, any
     entity holding Common Shares for or pursuant to the terms of any such plan,
     or, after the consummation of the Merger (as such term is hereinafter
     defined), the Westinghouse Air Brake Company Employee Ownership Trust.

         7. Section 3 of the Rights Agreement is hereby amended by adding the
following new paragraph at the end of Section 3:

               "(d) Notwithstanding anything in this Agreement that might
     otherwise be deemed to the contrary, Westinghouse Air Brake Company shall
     not be deemed an Acquiring Person and no Distribution Date shall be deemed
     to occur, in either case, as a result of the execution of the Agreement and
     Plan of Merger, dated as of June 2, 1999, between the Company and
     Westinghouse Air Brake Company, a Delaware corporation ("Westinghouse")(as
     the same may be amended from time to time, the "Merger Agreement"), the
     execution of the WABCO Stock Option Agreement, dated as of June 2, 1999,
     between Westinghouse and the Company (as the same may be amended from time
     to time, the "Option Agreement") or consummation of the transactions
     contemplated thereby pursuant to the terms of the Merger Agreement and the
     Option Agreement, as the case may be."

         8. The first sentence of Section 2 of the Rights Agreement is hereby
amended and restated in its entirety as follows:

     "The Company hereby appoints the Rights Agent to act as agent for the
     Company in accordance with the terms and conditions hereof, and the Rights
     Agent hereby accepts such appointment."

         9. Section 18 of the Rights Agreement is hereby amended by adding the
following new paragraph at the end of Section 18:



                                       3
   4
          "The indemnity provided herein shall survive the termination of this
     Agreement and the termination and the expiration of the Rights. The costs
     and expenses incurred in enforcing this right of indemnification shall be
     paid by the Company. Anything to the contrary notwithstanding, in no event
     shall the Rights Agent be liable for special, punitive, indirect,
     consequential or incidental loss or damage of any kind whatsoever
     (including but not limited to lost profits), even if the Rights Agent has
     been advised of the likelihood of such loss or damage. Any liability of the
     Rights Agent under the Rights Agreement will be limited to the amount of
     fees paid by the Company to the Rights Agent."

         10. This Amendment shall be governed by and construed in accordance
with the laws of the Commonwealth of Pennsylvania.

         11. This Amendment may be executed in counterparts and each of such
counterparts shall for all purposes be deemed to be an original, and both such
counterparts shall together constitute but one and the same instrument.

         12. Except as expressly set forth herein, this Amendment shall not by
implication or otherwise alter, modify, amend or in any way affect any of the
terms, conditions, obligations, covenants or agreements contained in the Rights
Agreement, all of which are ratified and affirmed in all respects and shall
continue in full force and effect.



                                       4
   5
         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
duly executed and attested, all as of the day and year first above written.

                                         MOTIVEPOWER INDUSTRIES, INC.


                                         By: /s/ Jeannette Fisher-Garber
                                            ------------------------------------
                                             Name:  Jeannette Fisher-Garber
                                             Title: Vice President, General
                                                    Counsel and Secretary

Attest


By:  /s/ Thomas P. Lyons
    -------------------------------------
    Name:  Thomas P. Lyons
    Title: Vice President and Treasurer

                                         CHASEMELLON SHAREHOLDER SERVICES,
                                         L.L.C., as Rights Agent


                                         By: /s/ J.D. Curtin
                                            ------------------------------------
                                             Name:  J.D. Curtin
                                             Title: Assistant vice President

Attest


By:  /s/ L.T. Schweiger
    -------------------------------------
    Name:    L.T. Schweiger
    Title:   Senior Account Administrator



                                       5