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                                                                    EXHIBIT 4.15

                      AMENDMENT TO THE AMENDED AND RESTATED
                  APPOINTED 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 Appointed
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.<PAGE>

                                                                    EXHIBIT 4.17

                   AMENDMENT TO THE 1999 CHAIRMAN 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 indicated below.

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

     WHEREAS, the Company sponsors the 1999 Chairman Stock Option Plan of
American Freightways Corporation (the "Plan"); and

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

     WHEREAS, the Committee and 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 Chairman 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
     the Director had not resigned or been terminated.

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

                                                                    EXHIBIT 4.18

                   AMENDMENT TO THE 1999 CHAIRMAN 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 1999 Chairman Stock Option Plan of
American Freightways Corporation (the "Plan"); and

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

     WHEREAS, the Committee and 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 so that, after giving
affect to all prior amendments, the third and last sentence thereof shall read
as follows:

          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 Company's obligations
     hereunder and thereunder, and (iii) notwithstanding paragraph 3E of Section
     2, if an optionee resigns or is terminated as Chairman 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 the Chairman had not resigned or been terminated, so long as
     the Chairman remains otherwise employed by an affiliate of the Company, or
     its successor, or serves as a member of the Board of Directors of an
     affiliate of the Company or its successor, and, thereafter, until the
     expiration of the vesting period with respect to the options, agrees to be
     available to consult on matters affecting the Company or its successor.

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

                                                                    EXHIBIT 4.20

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

     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 1993 Amended and Restated Chairman 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 the
     Chairman resigns or is terminated as Chairman of the Company 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 the Chairman had not resigned or been terminated,
     so long as the Chairman remains otherwise employed by an affiliate of the
     Company, or its successor, or serves as a member of the Board of Directors
     of an affiliate of the Company or its successor, and, thereafter, until the
     expiration of the vesting period with respect to the options, agrees to be
     available to consult on matters affecting the Company or its successor.

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

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