Exhibit 12

SWIFT TRANSPORTATION COMPANY

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

     The following table sets forth our ratio of earnings to fixed charges on a historical basis for the periods indicated.

	Successor																	Predecessor
																		January 1,
																		2007
						Year Ended												Through			Year Ended
	Three Months Ended March 31,					December 31,												May 10,			December 31,
(Dollars in thousands)	2011		2010			2010			2009			2008			2007			2007			2006
Earnings available to cover fixed charges:
Income (loss) before income taxes	$	3,205	$	(53,001	)	$	(168,845	)	$	(108,995	)	$	(135,187	)	$	(330,504	)	$	(34,999	)	$	221,274
Fixed charges		45,900		90,258			337,453			272,725			257,147			195,276			12,965			35,088
Earnings available to cover fixed charges	$	49,105	$	37,257		$	168,608		$	163,730		$	121,960		$	(135,228	)	$	(22,034	)	$	256,362
Fixed Charges
Interest expense	$	37,501	$	62,596		$	251,129		$	200,512		$	222,177		$	171,115		$	9,454		$	26,870
Derivative interest expense (income)		4,680		23,714			70,399			55,634			18,699			13,233			(177	)		(1,134	)
Interest portion of rental expense		3,719		3,948			15,925			16,579			16,271			10,928			3,688			9,352
Total fixed charges	$	45,900	$	90,258		$	337,453		$	272,725		$	257,147		$	195,276		$	12,965		$	35,088
Ratio of earnings to fixed charges (a)		1.07		0.41			0.50			0.60			0.47			—			—			7.31

(a) Our earnings were insufficient to cover fixed charges by approximately $53 million for the three months ended March 31, 2010 and by $169 million, $109 million, $135 million, $331 million, and $35 million for the years ended December 31, 2010, 2009, 2008, 2007, and that of our predecessor for the period from January 1, 2007 through May 10, 2007, respectively.