Yellow (YELLQ) 10-Q 2004 Q2 Quarterly report

EXHIBIT 32.1

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 Yellow Roadway Corporation on Form 10-Q for the period ended June 30, 2004, as filed with the Securities and Exchange Commission of the date hereof (the “Report”), I, William D. Zollars, Chief Executive Officer of Yellow Roadway Corporation, 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 Yellow Roadway Corporation.

Date: August 9, 2004	/s/ William D. Zollars
	William D. Zollars
	Chairman of the Board of
	Directors, President & Chief
	Executive Officer