UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

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

Date of report (Date of earliest event reported): December 16, 2005

SWIFT TRANSPORTATION CO., INC.

(Exact Name of Registrant as Specified in Charter)

Nevada	0-18605	86-0666860
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)

2200 South 75th Avenue, Phoenix, Arizona	85043
(Address of Principal Executive Offices)	(Zip Code)

(602) 269-9700

(Registrant’s telephone number, including area code)

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

ITEM 1.01 ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT

On December 16, 2005, the Company amended its existing $550 million revolving credit agreement. This amendment included a reduction of the borrowing rate associated with LIBOR based borrowings, the addition of a provision that allows the Company to increase the revolving credit commitment by up to an additional $200 million and a modification to the composition of the lending group resulting in a net reduction from 17 to 15 financial institutions.

On December 21, 2005, the Company amended its existing accounts receivable securitization agreement. This amendment extended the expiration date to December 20, 2006, increased the availability (subject to the calculation of eligible receivables) to $300 million and added a second financial institution as co-purchaser under the program.

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.

Dated: December 21, 2005

SWIFT TRANSPORTATION CO., INC.
 

/s/ Glynis Bryan  

By: Glynis Bryan 

Chief Financial Officer