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American Transportation Research Institute has completed the first phase of a truck rollover study that it said could result in highway improvements and electronic notification systems to warn drivers as they approach areas where roll-overs are prevalent.

Caterpillar Inc. has agreed to sell a majority interest in its third-party logistics business to privately held Platinum Equity for about $750 million, while retaining its in-house international network to support its dealers and customers.

WASHINGTON — If the Environmental Protection Agency had not taken a shortcut in writing a regulation allowing Navistar Inc. to pay penalties in order to sell engines that exceed 2010 emissions standards, the truck manufacturer would have had to stop selling the engines, a federal attorney said in court.

Federal officials said they have completed safety audits for three more Mexico-based carriers wishing to operate in the United States, but participation in the cross-border program remains far below what the U.S. government has said is needed to properly gauge the safety of Mexican carriers.

The Commercial Vehicle Safety Alliance said that roughly 10,000 truck and bus inspectors will fan out at more than 1,500 locations across North America from June 5-7 for the annual “Roadcheck” safety event.

Retail diesel prices retreated another 5.3 cents to $4.004 a gallon last week, the Department of Energy reported, as crude oil prices sank to their lowest levels of the year.

The Federal Motor Carrier Safety Administration has formally withdrawn its regulation that would have mandated electronic onboard recorders for some carriers.

Total cargo volume in Southern California ports of Los Angeles and Long Beach rose 2% in April, indicating stronger international trade volume at the nation’s two largest ports.