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Teamsters union members employed at car hauler Performance Transportation Services went on strike against the company Monday to enforce the union’s bargaining table demands, the union said.

Two bills circulating in Congress would eliminate a loophole that permits foreign producers of biodiesel to get a tax credit if they “splash” their product with petroleum-based diesel in the United States and then sell it overseas.

Canadian transportation firm Mullen Group Income Fund said Thursday it would buy the transport unit of Essential Energy Services Trust for C$135 million.

An index of the U.S. economy’s service sector slipped in May from a month earlier but continued to show expansion, the Institute for Supply Management said Wednesday.

Sen. Susan Collins (R-Maine) has introduced legislation that would allow trucks to carry up to 100,000 pounds on federal highways when diesel prices are at least $3.50 a gallon.

The Ontario Trucking Association said that a joint meeting this week of the Ontario and Quebec government cabinets moved them closer to accord on trucking issues such as implementing speed limiter legislation and allowing for longer combination vehicles.

First-quarter U.S. worker productivity rose 2.6% from the previous quarter, up from an earlier estimate, the Labor Department said Wednesday.

Logistics and delivery firm Dynamex Inc. said its fiscal third-quarter profit was $3.8 million, or 37 cents a share, up from $3.5 million, or 33 cents, a year earlier.

Just days after a new report recommended improvements to drug-testing programs that could better identify illegal drug users and keep them off the road, Reps. Jim Oberstar (D-Minn.), John Mica (R-Fla.) and Peter DeFazio (D-Ore.) announced their intention to introduce legislation aimed at establishing a national clearinghouse of positive drug-test results.

General Motors Corp. is closing four North American truck and sport utility vehicle plants, in light of high fuel prices that are pushing consumers to smaller vehicles, the Associated Press reported Tuesday.