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): September 28, 2006

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))

TABLE OF CONTENTS

Exhibit 99.1

 Exhibit 99.1

ITEM 2.06 MATERIAL IMPAIRMENT

On September 28, 2006, the Company identified an impairment associated with our fleet of translucent trailers previously designated as assets held for sale. This impairment is a result of the deterioration in their market value. The one-time pre-tax impairment charge is estimated to be between $5.0 million and $8.0 million and would be recognized in the third quarter of 2006. The Company plans to sell these trailers over the next twelve months.

ITEM 7.01 REGULATION FD DISCLOSURE

On September 28, 2006, we announced in a press release information concerning our anticipated earnings for the three months ended September 30, 2006. A copy of this press release, including information concerning forward-looking statements and factors that may affect our future results, is attached at Exhibit 99.1.

The information in this Item 7.01 and in Exhibit 99.1 to this report shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

ITEM 9.01 FINANCIAL STATEMENTS AND EXHIBITS

     (a) Not applicable.

     (b) Not applicable.

     (c) Not applicable.

     (d) Exhibits.

          99.1 Press Release dated September 28, 2006.

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: September 28, 2006

SWIFT TRANSPORTATION CO., INC.
 

/s/ Glynis Bryan  

By: Glynis Bryan 

       Chief Financial Officer 

EXHIBIT INDEX

Exhibit 99.1 Press Release dated September 28, 2006.