In connection with the Annual Report of Trinity Industries, Inc. (the
“Company”) on Form 10-K for
the period ended
December 31, 2006 as filed with the Securities and Exchange Commission on the date
hereof (the
“Report”), I,
William A. McWhirter II, Senior Vice President and Chief Financial
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:
A signed original of this written statement required by Section 906 has been provided to the
Company and will be retained by
the Company and furnished to the Securities and Exchange Commission
or its staff upon request.