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Trucking companies and equipment manufacturers told the National Highway Traffic Safety Administration they are willing to cooperate on further regulation of greenhouse-gas emissions but also raised concerns that they hope will keep any proposal from unintentionally backfiring.

An 80% jump in orders for refrigerated trailer units helped fuel a 36.7% gain in industrywide orders in July from the same month a year earlier, ACT Research reported.

The retail diesel price in the United States fell 1.4 cents to $3.821 a gallon, the lowest level during the final week of August in three years, the Department of Energy reported.

A U.S. Appeals Court rejected a bid by three California community groups to overturn a lower court ruling that emissions from trucks and locomotives in BNSF Railway and Union Pacific facilities did not violate a federal waste disposal law.

The U.S. diesel average dipped 0.8 cent to $3.835 a gallon, its lowest level since mid-November, the Department of Energy reported.

Trucking fuel card provider Comdata Inc. has agreed to a $3.45 billion acquisition by FleetCor Technologies Inc., another provider of fuel cards, which intends to expand its North American electronic fleet payment services.