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WASHINGTON — Inaction this year on a long-term infrastructure funding bill in the U.S. House prompted a top Democrat to strongly voice his frustration toward Republicans at a high-profile hearing Oct. 11 that looked at ways to fund the nation’s transportation network.

Truck platooning — also known by the more precise but less compelling term “cooperative adaptive cruise control” — will soon become available to trucking fleets interested in testing the latest in fuel-saving technology.

Volkswagen AG is flanking its push into electric cars with plans to roll out battery-powered commercial vehicles targeted at urban areas as growing public concerns about air quality boost demand.

The U.S. average retail price of diesel fell 1.6 cents to $2.776 a gallon, and oil pushed over $50 a barrel amid reports of possible further reductions in supply.

Tesla Inc. pushed back the reveal of its semi-truck by three weeks as CEO Elon Musk focuses on boosting production of the cheaper sedan that the electric-car maker is counting on to dramatically increase sales.

Just weeks before it takes effect, California’s new gas tax increase is again under attack, with Republicans mounting a growing campaign against the higher levies.

Volvo Trucks introduced two gas-powered, heavy-duty trucks that offer fuel efficiency and performance on par with that of diesel-fueled trucks, and comply with Euro 6 emissions regulations.

Warren Buffett’s Berkshire Hathaway Inc. bought a stake in Pilot Travel Centers LLC, owner of the Pilot Flying J truck stop chain, and detailed plans to become the company’s biggest shareholder in six years.

The U.S. average retail price of diesel crept up 0.4 cent to $2.792 a gallon, and oil dropped closer to $50 a barrel.