Exhibit 99.1

SWIFT TRANSPORTATION RECEIVES LETTER FROM JERRY MOYES

Phoenix, Arizona; November 6, 2006—Swift Transportation Co., Inc. (NASDAQ:SWFT) confirmed today that it received a letter from Jerry Moyes, the Company’s largest shareholder, a current Director, and a former Chairman of the Board and CEO of Swift, proposing to acquire all of the Company’s outstanding common stock in an all-cash transaction at a price of $29.00 per share. A copy of the letter sent by Mr. Moyes follows this press release.

The Company’s Board of Directors has formed a Special Committee to review and evaluate the proposal, consistent with its fiduciary duties. Goldman, Sachs & Co. is serving as financial advisor to Swift.

The Company and its dedicated employees remain focused on business as usual; executing current initiatives, delivering superior service to our customer partners and creating value for our shareholders.

Swift is the holding company for Swift Transportation Co., Inc., a truckload carrier headquartered in Phoenix, Arizona. Swift’s trucking subsidiary operates the largest fleet of truckload carrier equipment in the United States with regional operations throughout the continental United States.

Forward-looking statement disclosure:

This press release contains statements that may constitute forward-looking statements, usually identified by words such as “anticipates,” “believes,” “estimates, “plans,” “projects,” “expects,” “intends” or similar expressions which speak only as of the date the statement was made. Such forward-looking statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Such statements are based upon the current beliefs and expectations of Swift’s management and are subject to significant risks and uncertainties. Actual results may differ from those set forth in the forward-looking statements.

As to Swift’s business and financial performance, the following factors, among others, could cause actual results to differ materially from those in forward-looking statements: prevailing market conditions relating to our determination of the fair value of assets held for sale and related impairment charges; adverse developments in our relationship with IEL and, by extension, owner-operators whose tractors are financed by IEL; the impact of our new owner-operator fuel surcharge reimbursement program and recent changes in our driver pay structure on operating results; excess capacity in the trucking industry; significant increases or rapid fluctuations in fuel prices, interest rates, fuel taxes, tolls, license and registration fees, insurance premiums and driver compensation, to the extent not offset by increases in freight rates or fuel surcharges; recessionary economic cycles and downturns in customers’ business cycles, particularly in market segments and industries (such as retail and manufacturing) in which Swift has a significant concentration of customers or changes in our customers’ transportation purchasing patterns; seasonal factors such as harsh weather conditions that increase operating costs; continuing difficulties in driver recruitment or retention issues involving Company drivers and/or owner-operators; increases in driver compensation to the extent not offset by increases in freight rates; the inability of Swift to continue to secure acceptable financing arrangements; an adverse determination by the FMSCA with respect to Swift’s safety rating and any resulting loss of customers or potential customers or a material increase in insurance costs; an unanticipated increase in the number or dollar amount of claims for which Swift is self insured; fluctuations in workers’ compensation claims, which have benefited recent operating results due to improved claims management, but are not expected

to continue at such levels in future periods; competition from trucking, rail and intermodal competitors; our ability to sell assets held for sale at or above their net book value; the potential impact of current litigation, regulatory issues, or other government actions; a possible adverse impact on the trading price of the Company’s common stock as a result of the adoption of the Stockholders Protection Agreement; and a significant reduction in or termination of Swift’s trucking services by a key customer.

A discussion of these and other factors that could cause Swift’s results to differ materially from those described in the forward-looking statements can be found in the most recent Annual Reports on Form 10-K and Form 10-Q of Swift, filed with the Securities and Exchange Commission and available at the Securities and Exchange Commission’s internet site (http://www.sec.gov). Swift undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise. Furthermore, nothing herein shall constitute an adoption or approval of any analyst report regarding Swift, nor any undertaking to update or comment upon analysts’ expectations in the future.

Contact:
Glynis Bryan
CFO
Swift Transportation Co., Inc.
(602) 269-9700

A copy of the letter received from Mr. Moyes is as follows: