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As I write this in early March, the U.S. Department of Energy reports that the price of diesel fuel in the United States is $2.045 per gallon. After hitting a record high of $4.764 on July 14, the price of diesel has fallen by $2.719.

LOUISVILLE, Ky. — Cummins Inc. said it is confident the Environmental Protection Agency will approve the company’s use of copper zeolite in engines de-signed to meet 2010 emission rules, removing any potential roadblock for the new models.

Transportation officials in Colorado said initial feedback from commercial drivers who have used the AutoSock, a heavy-duty cloth covering for tires, has been positive, and it could become an accepted alternative to metal snow chains.

LOUISVILLE, Ky. — Truck and engine makers took advantage of one of the last major marketing forums before the onset of new federal emission rules to starkly set the stage for buyers of heavy-duty vehicles in choosing between SCR and EGR for their diesel engines.

Forget about getting truck drivers to remove snow and ice from trailer rooftops. For one, many drivers cannot even walk across the parking lot, let alone be expected to somehow get on top of a trailer roof.

The U.S. Environmental Protection Agency last week took the first step toward creating a national cap-and-trade system, proposing a new rule that would establish a federal system for reporting carbon dioxide emissions and other greenhouse gases produced by large stationary and mobile sources.

The U.S. retail diesel fuel average dropped 4.2 cents last week to $2.045 a gallon, as the price in the Midwest fell below $2, the first time that has occurred anywhere in more than four years, the Department of Energy reported.

In its continued attack on greenhouse gas emissions, the California Air Resources Board recently proposed a rule cutting the “carbon intensity” of transportation fuels.

ORLANDO, Fla. — The Truckload Carriers Association has decided for the first time to support a fuel tax increase as a preferred method of highway funding.