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Nikola Corp. founder Trevor Milton said he wouldn’t take the witness stand in his criminal fraud trial, as the defense prepares to rest its case.

WASHINGTON — President Joe Biden, a self-described “car guy,’’ often promises to lead by example on climate change by moving swiftly to convert the sprawling U.S. government fleet to zero-emission electric vehicles. But efforts to eliminate gas-powered vehicles from the fleet have lagged.

NEW BRAUNFELS, Texas — Continental’s new automotive manufacturing plant is officially up and running after a yearlong delay caused by the pandemic.

Federal trucking regulators have issued a proposal that would require every commercial motor vehicle operating in interstate commerce be equipped with an electronic identification system.

Federal trucking regulators are planning a study that will examine the effect of human driver factors for Level 2 and Level 3 automated driving systems on commercial trucks.

WASHINGTON — All 50 states received final approval Sept. 27 to begin construction on a first nationwide network of electric vehicle charging stations that places one roughly every 50 miles along interstate highways, part of the Biden administration’s plan to spur widespread adoption of zero-emission cars.

Cemvita Factory Inc., a Houston-based biotech company backed by Occidental Petroleum Corp., says tax credits passed by Congress last month will allow it scale up plans to produce hydrogen using oil-eating microbes.

The U.S. Department of Energy, the private sector and a new national nonprofit have stepped up their respective efforts recently to bring hydrogen forward as a mainstream fuel for trucking, among other industrial uses.

To better position the use of advanced energy in the nation’s heartland, governors of seven states have formed the Midwest Hydrogen Coalition to spur creation of a robust hydrogen market, supply chain and workforce.

TUCSON, Ariz. — Pony.ai, a developer of self-driving cars based in China and Silicon Valley, will begin testing its autonomous vehicles in Tucson, with trained safety drivers behind the wheel, in a partnership with Pima Community College.