FORM 8-K

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                 CURRENT REPORT

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

         Date of Report (Date of earliest event reported) March 14, 2003


                           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)


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


                                 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-K for the year ended  December 31, 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. Please see the Company's Form 10-K filed with
the Securities  and Exchange  Commission for the period ended December 31, 2002,
for more information.

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  Chief
                    Executive  Officer,  of the Company's Form 10-K for the year
                    ended December 31, 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-K for the year
                    ended December 31, 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.

                                   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: March 14, 2003                   /s/ Timothy M. Kohl
                                        ----------------------------------------
                                        Timothy M. Kohl
                                        Executive Vice-President, Secretary, and
                                        Chief Financial Officer