EXHIBIT 99.1

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Trinity Industries, Inc. (the
"Company") on Form 10-Q for the period ended September 30, 2002 as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I,
Timothy R. Wallace, Chairman, President and Chief Executive Officer of the
Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)   The Report fully complies with the requirements of section 13(a) or 15(d)
      of the Securities Exchange Act of 1934; and

(2)   The information contained in the Report fairly presents, in all material
      respects, the financial condition and results of operations of the
      Company.


/s/ Timothy R. Wallace

Timothy R. Wallace
Chairman, President and Chief Executive Officer
November 7, 2002