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                                                                     EXHIBIT 4.6

             AMENDMENT TO THE AMENDED AND RESTATED 1993 STOCK OPTION
                    PLAN OF AMERICAN FREIGHTWAYS CORPORATION
                    ----------------------------------------

     THIS AMENDMENT, made by the Compensation Committee and the Board of
Directors of American Freightways Corporation (the "Company") is effective as of
the date signed by the officer below.

                               W-I-T-N-E-S-S-E-T-H

     WHEREAS, the Company sponsors the Amended and Restated 1993 Stock Option
Plan of American Freightways Corporation (the "Plan"); and

     WHEREAS, the Plan authorizes the Committee and the Board of Directors to
amend the Plan from time to time; and

     WHEREAS, the Committee and the Board of Directors has determined that it is
in the best interests of the Plan's participants and beneficiaries and the
Company's shareholders to amend Article XII of the Plan to provide for the
treatment of options upon the occurrence of certain events.

     NOW, THEREFORE, the Plan is hereby amended as follows:

1. Effective as of the date set forth below, Article XII shall be amended, so
that, after giving affect to all prior amendments, the last two paragraphs (the
sixth and seventh paragraphs) thereof shall read as follows:

          A termination of employment shall not be deemed to occur by reason of
     (i) the transfer of an employee from employment by the Company to
     employment by a subsidiary corporation or a parent corporation of the
     Company, (ii) the transfer of any employee from employment by a subsidiary
     corporation or a parent corporation of the Company to employment by the
     Company or by another subsidiary corporation or parent corporation of the
     Company, or (iii) the transfer or continued employment of an employee from
     employment by the Company or a subsidiary corporation to employment by a
     successor corporation or a parent corporation or affiliate corporation of
     such successor corporation upon the merger or consolidation of the Company
     with or into such successor corporation. Notwithstanding anything in this
     Plan to the contrary, if an optionee who is Chairman of the Company resigns
     or is terminated as Chairman as a result of or arising from a merger or
     consolidation of the Company, options granted prior to such resignation or
     termination (or any substituted options) shall continue to vest and shall
     remain exercisable for such time and in such manner as if the optionee had
     not resigned or been terminated.

          In the event of a merger or consolidation of the Company in which the
     Company does not survive and the agreement of merger or consolidation
     provides that outstanding Options or Rights shall not terminate (or shall
     be substituted) as a result of such event, unless otherwise provided in the
     agreement of merger or consolidation, (i) this Plan shall continue and be
     effective for purposes of administering Options or Rights previously
     granted and remaining outstanding (or any substituted options or rights),
     and (ii) the successor company (or its parent) to such merger or
     consolidation shall assume the Company's obligations hereunder and
     thereunder.

This amendment is executed and effective as of this 19th day of January, 2001.<PAGE>

                                                                     EXHIBIT 4.8

             AMENDMENT TO THE 1989 NONSTATUTORY STOCK OPTION PLAN OF
                        AMERICAN FREIGHTWAYS CORPORATION
                        ---------------------------------

     THIS AMENDMENT, made by the Board of Directors of American Freightways
corporation (the "Company") (formerly Arkansas Freightways Corporation) is
effective as of the date indicated below.

                               W-I-T-N-E-S-S-E-T-H

     WHEREAS, the Company sponsors the 1989 Arkansas Freightways Corporation
Nonstatutory Stock Option Plan (the "Plan"); and

     WHEREAS, Section 7 of the Plan authorizes the Board of Directors of the
Company to amend the Plan from time to time; and

     WHEREAS, the Board of Directors of the Company has determined that it is in
the best interests of the Plan's participants and beneficiaries and the
Company's shareholders to amend Section 4(g) of the Plan to provide for the
treatment of options upon the occurrence of certain events.

     NOW, THEREFORE, the Plan is hereby amended as follows:

1. Effective as of the date set forth below, paragraph 4(g) is amended by adding
at the end thereof a new paragraph 4(g)(vii) as follows:

          (vii)(a) A termination of employment shall not be deemed to occur by
     reason of (i) the transfer of an employee from employment by the Company to
     employment by a subsidiary corporation or a parent corporation of the
     Company, (ii) the transfer of any employee from employment by a subsidiary
     corporation or a parent corporation of the Company to employment by the
     Company or by another subsidiary corporation or parent corporation of the
     Company, or (iii) the transfer or continued employment of an employee from
     employment by the Company to employment by a successor corporation or a
     parent or affiliate corporation of such successor corporation upon the
     merger or consolidation of the Company with or into such successor
     corporation. In the event of a merger or consolidation of the Company in
     which the Company does not survive and the agreement of merger or
     consolidation provides that outstanding Options or Accelerated Options
     shall not terminate (or shall be substituted) as a result of such event,
     unless otherwise provided in the agreement of merger or consolidation, (i)
     this Plan shall continue and be effective for purposes of administering
     Options or Accelerated Options previously granted and remaining outstanding
     (or any substituted options or rights), and (ii) the successor company (or
     its parent) to such merger or consolidation shall assume the liabilities
     hereunder and thereunder.

This amendment is executed and effective as of this 12th day of November, 2000.<PAGE>

                                                                     EXHIBIT 4.9

             AMENDMENT TO THE 1989 NONSTATUTORY STOCK OPTION PLAN OF
                        AMERICAN FREIGHTWAYS CORPORATION
                        ---------------------------------

     THIS AMENDMENT, made by the Board of Directors of American Freightways
Corporation (the "Company") (formerly Arkansas Freightways Corporation) is
effective as of the date signed by the officer below.

                               W-I-T-N-E-S-S-E-T-H

     WHEREAS, the Company sponsors the 1989 Arkansas Freightways Corporation
Nonstatutory Stock Option Plan (the "Plan"); and

     WHEREAS, Section 7 of the Plan authorizes the Board of Directors of the
Company to amend the Plan from time to time; and

     WHEREAS, the Board of Directors of the Company has determined that it is in
the best interests of the Plan's participants and beneficiaries and the
Company's shareholders to amend Section 4(g) of the Plan to provide for the
treatment of options upon the occurrence of certain events.

     NOW, THEREFORE, the Plan is hereby amended as follows:

1. Effective as of the date set forth below, paragraph 4(g)(vii), after giving
affect to all prior amendments, shall read as follows:

          (vii)(a) A termination of employment shall not be deemed to occur by
     reason of (i) the transfer of an employee from employment by the Company to
     employment by a subsidiary corporation or a parent corporation of the
     Company, (ii) the transfer of any employee from employment by a subsidiary
     corporation or a parent corporation of the Company to employment by the
     Company or by another subsidiary corporation or parent corporation of the
     Company, or (iii) the transfer or continued employment of an employee from
     employment by the Company or a subsidiary corporation to employment by a
     successor corporation or a parent corporation or affiliate corporation of
     such successor corporation upon the merger or consolidation of the Company
     with or into such successor corporation. In the event of a merger or
     consolidation of the Company in which the Company does not survive and the
     agreement of merger or consolidation provides that outstanding Options or
     Accelerated Options shall not terminate (or shall be substituted) as a
     result of such event, unless otherwise provided in the agreement of merger
     or consolidation, (i) this Plan shall continue and be effective for
     purposes of administering Options or Accelerated Options previously granted
     and remaining outstanding (or any substituted options or rights), and (ii)
     the successor company (or its parent) to such merger or consolidation shall
     assume the liabilities hereunder and thereunder.

This amendment is executed and effective as of this 19th day of January, 2001.<PAGE>

                                                                    EXHIBIT 4.12

                      AMENDMENT TO THE AMENDED AND RESTATED
                   ELECTED NON-EMPLOYEE DIRECTOR STOCK OPTION
                    PLAN OF AMERICAN FREIGHTWAYS CORPORATION
                    ----------------------------------------

         THIS AMENDMENT, made by the Board of Directors of American Freightways
corporation (the "Company") is effective as of the date indicated below.

                               W-I-T-N-E-S-S-E-T-H

         WHEREAS, the Company sponsors the Amended and Restated Elected
Non-Employee Director Stock Option Plan of American Freightways Corporation
(the "Plan"); and

         WHEREAS, paragraph 5 of Section 1 of the Plan authorizes the Board of
Directors of the Company to amend the Plan from time to time; and

         WHEREAS, the Board of Directors of the Company has determined that it
is in the best interests of the Plan's participants and beneficiaries and the
Company's shareholders to amend Section 3 of the Plan to provide for the
treatment of options upon the occurrence of certain events.

         NOW, THEREFORE, the Plan is hereby amended as follows:

1. Effective as of the date set forth below, the second paragraph of Section 3
(Recapitalizations and Reorganizations) shall be amended by adding at the end
thereof the following sentence:

                  In the event of a merger or consolidation of the Company in
         which the Company does not survive and the agreement of merger or
         consolidation provides that outstanding options shall not terminate (or
         shall be substituted), unless otherwise provided in the agreement of
         merger or consolidation, (i) this Plan shall continue and be effective
         for purposes of administering options previously granted and remaining
         outstanding (or any substituted options), (ii) the successor company
         (or its parent) to such, merger or consolidation shall assume the
         liabilities hereunder and thereunder, and (iii) notwithstanding
         paragraph 3E of Section 2, if an optionee resigns or is terminated as a
         director as a result of or arising from such merger or consolidation of
         the Company, options granted prior to such resignation or termination
         (or any substituted options) shall continue to vest and shall remain
         exercisable for such time and in such manner as if such director had
         not resigned or been terminated, so long as the director agrees to be
         available to consult on matters affecting the Company or its successor
         for the remainder of the vesting period with respect to the options.

This amendment is executed and effective as of this 12th day of November, 2000.

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