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WASHINGTON — Legislation proposed last week could allow federal weight limits for trucks to rise to 97,000 pounds and for the first time set fuel-efficiency standards for trucks.

LAS VEGAS — Leaders of the Truckload Carriers Association said they will take a more active role in shaping trucking’s policy in the coming year and emphasize the need to provide drivers a safer work environment and wage stability.

Dedicated Transport, a private trucking company based in Cleveland, said it bought Baker’s Transport Service of Lakeland, Fla. Terms were not released.

WASHINGTON — Sen. Patty Murray (D-Wash.), author of the rules Congress set for opening the U.S. border to Mexican trucks, told Transportation Secretary Mary Peters she suspected the agency may be stacking the deck in its recently announced pilot program.

A coalition of trucking safety groups issued a report this week giving poor grades to the Federal Motor Carrier Safety Administration for failing to do enough to reduce large truck-related fatalities.

Safety-watchdog group Public Citizen said Tuesday it sued the Federal Motor Carrier Safety Administration on behalf of a highway safety organization to compel the agency to release information about recent decision to allow Mexican trucks onto U.S. highways.

Cascade Sierra Solutions, a nonprofit group that promotes the sale of products to help truck drivers save fuel and reduce emissions, said it has opened the first of what could be as many as eight “green truck technology” showrooms along the Interstate 5 corridor in Oregon, Washington and California.

The Environmental Protection Agency has proposed for the first time sharp cuts in exhaust emissions from railroad locomotive and marine engines in a plan a spokesman said would “follow exactly the same pattern” as environmental regulations for truck engines.

The number of heavy-duty trucks in use in the United States increased 5.2% to 3.51 million Class 8 commercial vehicles last year, as fleet owners stocked up on new trucks and kept more old vehicles in service, market research firm R.L. Polk & Co. said.