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Retail diesel prices reversed course last week, as the national average rose 3.3 cents a gallon to $2.961 after falling 19.9 cents in the five previous weeks, the Department of Energy reported.

CSX Transportation and the District of Columbia filed a motion in federal court last week saying they plan to end their litigation over an attempt by the city to ban hazardous materials shipments.

SmartTruck, a company founded by aerospace engineers, has received approval from the U.S. Environmental Protection Agency for trailer attachments that it said could improve over-the-road fuel efficiency by up to  11% and that it soon would begin manufacturing them.

Trucking and supply chain firm NFI Industries said Tuesday it has acquired IPD, a global transportation and logistics company based in Mississauga, Ontario, Canada.

Trailer maker Wabash National Corp. said it has begun production on 350 new refrigerated van trailers for Frozen Food Express Industries, to be completed by September.

Harbor commissioners at the Port of Los Angeles late last week approved a proposal that will allow drayage operators — who were provided millions of dollars for the purchase of newer, cleaner trucks — to cut in half a requirement that they make a minimum of 300 annual trips to the port.

The U.S. Chamber of Commerce elected John Ruan III, chairman and chief executive officer of Ruan Transportation Management Systems, as vice chairman of its board of directors, the group announced June 9.

ARLINGTON, Va. — Transportation Secretary Ray LaHood said the Obama administration is spending money on freight rail projects to bolster its push for high-speed intercity passenger rail.