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President Obama must decide by Sept. 17 whether to accept the recommendation of the U.S. International Trade Commission to impose tariffs on passenger and light-truck tires made in China, the second-largest U.S. trading partner.

The number of Class 8 vehicles operating in the United States totaled 3.641 million units in the second quarter, an increase of less than 1% over the same quarter in 2008, transportation research firm R.L. Polk & Co. said.

Truck component maker Eaton Corp. said that it would provide the electric power systems for 378 Class 5 electric hybrid plug-in vehicles under a federal grant, which it called the “largest commercial hybrid deployment” ever.

Future U.S. economic vitality depends on an adequately funded rural road system that can accommodate heavier trucks, a South Dakota trucking company president told a Senate committee last week.

Manufacturer ArvinMeritor Inc. said it lost $162 million in the April-to-June quarter, while also announcing last week it has found a buyer for its light-vehicle wheels business and has stepped up its marketing effort for truck disc and drum brakes ahead of the government’s new truck stopping-distance rule.

WASHINGTON — Transportation Secretary Ray LaHood an-nounced last week he will take steps to try to further curb distracting driving activities such as text messaging or using a cell phone or a Global Positioning System device.

There were no surprises in the new federal rule designed to improve the braking power of a standard, fully loaded, tractor-trailer by almost one-third.

The National Highway Traffic Safety Administration’s decision to cut the maximum allowed stopping distance for large trucks by 30% will increase truck buyers’ costs somewhat, but will not force a widespread shift to new technology such as air disc brakes, industry groups and manufacturers said.