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Parked east of the California Capitol steps was a long line of vehicles as clean as they were large, including a yellow school bus, a UPS delivery truck and an AC Transit bus — all with electric or hybrid motors.

COLUMBUS, Ind. — Cummins Inc. has unveiled a concept truck with an all-electric powertrain, highlighting the diesel engine manufacturer’s commitment to electric power as an important part of its future.

It could be years before drivers on U.S. highways catch a glimpse of a tractor-trailer rig cruising down the highway with another truck trailing a perilous 20 or 30 feet behind.

Run on Less, a first-of-its kind roadshow to demonstrate how trucks use technology to achieve fuel efficiency, is set to begin.

Deutsche Post DHL Group and automaker Ford have unveiled a jointly manufactured electric delivery van amid growing demand for emission-free utility vehicles.

The idea was nothing short of revolutionary: Convert the nation’s millions of trucks, buses and other commercial vehicles to run on natural gas instead of gasoline and diesel.

The state’s standard for the biodiesel blend will double to 20% at gas pumps next May, a decision that displeased trucking industry advocates.

YOUNTVILLE, Calif. — Daimler Trucks North America continues to expand its connected vehicle services to provide fleets with a broader arsenal of information and analytics tools they can use to make better business decisions.

More clean diesel trucks are a part of the nation’s fleet, subsequently yielding lower emissions and greater fuel savings, new research shows.

Cummins Inc. recently endorsed two fuel additives, marking the first time the diesel engine maker has taken such a step.