Knight Transportation Ranks 97th on 2008 InformationWeek 500

PHOENIX--(Business Wire)--
Knight Transportation, Inc. (NYSE: KNX), today announced that it
was ranked 97th on the 2008 InformationWeek 500. This is the second
consecutive year Knight has been recognized in the InformationWeek
500. InformationWeek has identified and honored the nation's most
innovative users of information technology with its annual listing,
now in its 20th year, and has tracked the technology, strategies,
investments and administrative practices of America's best-known
companies.

"We are honored to be listed again in the InformationWeek 500,"
said Dave Jackson, CFO of Knight Transportation. "This recognition is
a result of our efforts to integrate and align our IT team with our
business."

Truckload carriers face a diverse set of business requirements
customized for a broad range of shippers. We have invested and
continue to invest in technology to simplify what can be a complex set
of variables. Knight's focus has been on developing and implementing
technologies that optimize efficiency, deliver customized solutions to
our customers, and enhance the flow of information to our managers.

Knight Transportation, Inc., with headquarters in Phoenix,
Arizona, is a truckload carrier offering Dry Van, Refrigerated, and
Brokerage Services to its customers through a network of service
centers located throughout the United States. The principle types of
freight transported include consumer staples, retail, paper products,
packaging/plastics, manufacturing, and import/export commodities.
Knight's common stock is traded in the New York Stock Exchange under
the symbol KNX.

To learn more about Knight Transportation, please visit
www.knighttrans.com.

Additional details on the InformationWeek 500 can be found online
at www.informationweek.com/iw500/.

Knight Transportation, Inc.
David Jackson, CFO, 602-269-2000

Copyright Business Wire 2008