================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


         Date of Report (Date of earliest event reported) August 9, 2002


                           KNIGHT TRANSPORTATION, INC.
             (Exact name or registrant as specified in its charter)


           Arizona                    000-24946                   86-0649974
(State or other jurisdiction         (Commission                (IRS Employer
      of incorporation)              File Number)            Identification No.)


                  5601 W. Buckeye Road, Phoenix, Arizona 85043
               (Address of Principal Executive Offices) (Zip Code)


        Registrant's telephone number, including area code (602) 269-2000


                                 Not Applicable
          (Former name or former address, if changed since last report)

================================================================================

ITEM 1. CHANGES IN CONTROL OF REGISTRANT.

     Not applicable.

ITEM 2. ACQUISITION OR DISPOSITION OF ASSETS.

     Not applicable.

ITEM 3. BANKRUPTCY OR RECEIVERSHIP.

     Not applicable.

ITEM 4. CHANGE IN REGISTRANT'S CERTIFYING ACCOUNTANT.

     Not applicable.

ITEM 5. OTHER EVENTS.

     Concurrently with the filing of the Knight Transportation, Inc., an Arizona
corporation (the "Company"), Form 10-Q for the period ended June 30, 2002, Kevin
P. Knight, the Company's  President and Chief Executive Officer,  and Timothy M.
Kohl,  the  Company's  Chief  Financial   Officer,   provided  to  the  SEC  the
certifications  required  pursuant to Section 906 of the  Sarbanes-Oxley  Act of
2002, and 18 U.S.C.  Section 1350.

ITEM 6. RESIGNATION OF REGISTRANT'S DIRECTORS.

     Not applicable.

ITEM 7. FINANCIAL STATEMENTS, PROFORMA FINANCIAL INFORMATION AND EXHIBITS.

     Exhibits.

       99.1    Certification  by Kevin P. Knight,  the  Company's  President and
               Chief Executive Officer, of the Company's Form 10-Q for the three
               month period ended June 30, 2002, as required pursuant to Section
               906 of the  Sarbanes-Oxley  Act of 2002,  and 18  U.S.C.  Section
               1350.

       99.2    Certification  by Timothy M. Kohl, the Company's  Chief Financial
               Officer,  of the  Company's  Form 10-Q for the three month period
               ended June 30, 2002,  as required  pursuant to Section 906 of the
               Sarbanes-Oxley Act of 2002, and 18 U.S.C. Section 1350.

ITEM 8. CHANGE IN FISCAL YEAR.

     Not applicable.

ITEM 9. REGULATION FD DISCLOSURE.

     See Item 5, above.

                                      -2-

                                   SIGNATURES

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                        KNIGHT TRANSPORTATION, INC.


Dated: August 9, 2002                   /s/ Timothy M. Kohl
                                        ----------------------------------------
                                        Timothy M. Kohl
                                        Executive Vice-President, Secretary, and
                                        Chief Financial Officer

                                       -3-