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PORTLAND, Maine — The Commercial Vehicle Safety Alliance asked Transportation Secretary Ray LaHood to consider the safety effects of heavier weights on vehicle components such as axles and suspension and brake parts as part of a congressionally mandated truck size and weight study.

Used truck prices continued to rise in August while low-mileage inventory remained scarce at many dealerships, according to ACT Research and American Truck Dealers.

ATLANTA — A slowdown in global trade is forcing shippers and carriers to make adjustments in inventory and freight hauling capacity, transportation and supply chain experts said at the Council of Supply Chain Management Professionals annual conference here last week.

Cummins Inc. said it has received federal certification that its new 15-liter engine meets the coming 2014 greenhouse-gas standards, the latest sign that North America’s heavy-duty truck and engine makers are making headway in preparing for the new rule.

Navistar International Corp. is considering possible plant closures as new CEO Lewis Campbell looks to cut costs and restore profitability at the struggling truck maker.

Trucking industry leaders will gather this week at American Trucking Associations’ Management Conference & Exhibition to discuss recent accomplishments and prepare for the challenges of the upcoming year.

U.S. diesel and gasoline prices both declined for the second straight week, the Department of Energy said Oct. 1, as the fuels continued to back away from 11-week surges that drove up prices sharply.

PORTLAND, Maine — Federal Motor Carrier Safety Administration officials are exploring ways for motor carriers to begin getting credit for “good” inspector screenings and violation-free wireless inspections, a top agency official said.

Motor carrier scores in two of the five public safety categories in the federal government’s Compliance, Safety, Accountability program are “defective” in predicting crash risk, according to a new study.

Federal officials are warning trucking companies about a recent round of fraudulent letters sent to some carriers seeking banking information.