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The United States wants to do business with truck fleets that are more fuel-efficient, better for the environment and cheaper to operate.

California legislators have approved a pair of bills that would provide funding to help fleets purchase low-emission trucks and encourage the development and use of alternative-fuel trucks.

Less-than-truckload carrier Central Freight Lines Inc. has added 100 Freightliner compressed natural gas-powered tractors to its fleet of more than 1,600 trucks, the companies announced.

The Maryland Motor Truck Association will oppose a transportation funding plan put forth by Gov. Martin O’Malley (D) that includes a new sales tax on motor fuel and a 5-cent reduction in the gasoline tax but not in the diesel tax.

Trucking fleets wasted some $27 billion on fuel and wages as their vehicles sat in traffic jams around the country during 2011, according to a new report from Texas A&M University’s Transportation Institute.

Spurred by the demands of newer diesel engines, changing emissions technology and escalating competition, truck-stop operators say they have begun placing more fuels and other products where drivers can find them fast and buy them with a single swipe of a credit card.

Managers of the nation’s largest shipper-owned truck fleets are taking steps to counter the rising cost of fuel and equipment by more closely monitoring drivers and using new data collection techniques to make better routing decisions and improve compliance with safety and environmental regulations.

Truck and engine manufacturer Navistar International Corp., pressed to find a way to offer engines that comply with federal emissions regulations, said last week that it has reached an agreement to use Cummins Inc. selective catalytic reduction technology for its 13-liter engines and offer Cummins 15-liter engines in some of its International brand trucks.

The California Air Resource Board will be conducting increased heavy duty diesel truck inspections throughout August at scales, truck stops and fleet facilities.