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From maintaining optimum air pressure to avoiding jack-rabbit starts, a truck driver’s actions affect not only the life expectancy of tires but also a vehicle’s fuel efficiency.

Diesel fuel’s national average price fell 6.5 cents to $3.958 a gallon, the 10th straight weekly decline and the first time it has fallen below the $4 mark in almost six months, the Department of Energy said Sept. 22, although a surge in crude oil prices added uncertainty to the outlook.

A federal appeals court Wednesday denied a motion to block a clean trucks program at the Southern California ports of Long Beach and Los Angeles, allowing the sister ports to begin implementation of the program Oct. 1, the Contra Costa (Calif.) Times newspaper reported.

The Senate approved a bill that would provide tax credits for renewable energy and energy efficiency, the Associated Press reported, and a top trucking official urged Congress to pass comprehensive measures to help lower fuel costs.

Freight railroad Union Pacific Corp. Tuesday boosted its third-quarter earnings forecast due to lower fuel prices and improved operating efficiency.

More than 1,500 truckers at the Port of Oakland, Calif., have applied for 1,000 subsidies to retrofit their trucks to reduce emissions, the San Francisco Business Times reported Monday.

If you think the Environmental Protection Agency’s 2010 engine requirements will be the ultimate technological test for fleets, American Trucking Associations President Bill Graves has a message for you: There’s more to come.