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Clean Energy Fuels Corp. said Tuesday it will expand its network of liquefied natural gas stations in southern California in large cities and along major truck routes, with a goal to expand into the Southwest.

The California Air Resources Board has launched a $20 million funding assistance program to stimulate the purchase of hybrid trucks and buses.

The Obama administration last week issued its proposed new fuel efficiency and first-ever national greenhouse gases reduction standards for passenger cars and light trucks.

LOUISVILLE, Ky. — Truck and engine makers took advantage of one of the last major marketing forums before the onset of new federal emission rules to starkly set the stage for buyers of heavy-duty vehicles in choosing between SCR and EGR for their diesel engines.

Truck and engine maker Navistar Inc. said it will take a “leadership role” in trying to convince Congress and the new administration to delay full implementation of 2010 heavy-duty truck engine emission mandates.

A federal judge last week denied American Trucking Associations’ request for a preliminary injunction against controversial portions of emission-reduction programs at the California ports of Los Angeles and Long Beach.

Astronomic fuel prices are only part of the economic drag on trucking these days. Add the growing length of time on accounts receivables, more customer bankruptcies and the tightening of credit by suppliers and lenders, and it’s easy to see how carriers’ cash flow has ebbed.

China’s largest truck maker, Sinotruk, boosted a first-half profit 40% as consumers rushed to buy vehicles before the introduction of a new emissions regulation, Bloomberg reported Thursday.

Two national truckload carriers have signed letters of intent to participate in the port of Los Angeles’ Clean Trucks Plan, the Los Angeles Times reported Friday.

Little wonder that fuel efficiency was a major focus of equipment and service vendors exhibiting at the Mid-America Trucking Show last week.