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Allied Systems Holdings Inc., the largest U.S. car hauler, last week filed for Chapter 11 bankruptcy protection, the second time it has done so, saying it’s continuing to provide service and blaming weakness in the car and light-truck business for the move.

The Midwest-based intermodal trucking company formerly known as Universal Transportation Services has changed its name to Calhoun Truck Lines, the company announced.

Celadon Trucking Services said it has agreed to buy a portion of the equipment owned by Hiner Transport LLC. Terms of the deal were not disclosed.

Canadian bulk trucking company Trimac Transportation said it will acquire Ontario-based specialized bulk carrier Liquid Cargo Lines.

ALEXANDRIA, Va. — Low participation by Mexican carriers in the cross-border trucking program could lead to the resumption of Mexican tariffs on U.S. goods, an official with the Federal Motor Carrier Safety Administration said.

Trucking managers in information technology and finance will meet jointly in Tampa, Fla., next month to explore opportunities for efficiency improvement through IT and strategies for handling significant tax changes expected at the end of 2012.

Bigger trucks and a field study of the hours-of-service restart provision are among items American Trucking Associations said it wants included in any highway bill that emerges from the House-Senate conference committee weighing the legislation.

Over the next five years, the Federal Motor Carrier Safety Administration plans to significantly reduce truck-related crash fatality rates by developing new credentialing and driver safety fitness standards, expanding its regulatory reach to include shippers and other industry players and creating new programs aimed at weeding out high-risk motor carriers.

Trucks carrying hazardous materials will be banned from traveling through Boston during most of the daytime under a policy approved by Massachusetts state officials last week, the Boston Globe reported.