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Companies offering driver-assistance systems and developing autonomous vehicles are entering a new phase of more exacting oversight.

Federal regulators have granted a five-year exemption to fuel hauler Gemini Motor Transport to operate a flashing brake light system manufactured by Intellistop Inc.

Hydrogen producer Plug Power Inc.’s stock soared May 14 after the Biden administration offered the U.S. company a conditional commitment for $1.66 billion in loan guarantees to build up to six facilities.

WASHINGTON — The Biden administration announced plans to slap new tariffs on Chinese electric vehicles, advanced batteries, solar cells, steel, aluminum and medical equipment.

DETROIT — The U.S. government’s highway safety agency has opened another investigation of automated driving systems, this time into crashes involving Waymo’s self-driving vehicles.

As cars and trucks get smarter and more connected, the humble lights that have controlled the flow of traffic for more than a century could also be on the cusp of a major transformation.

Superpowers led by the U.S. and European Union have funneled $81 billion toward cranking out the next generation of semiconductors, escalating a showdown with China for chip supremacy.

NHTSA has opened an investigation into Zoox, the autonomous vehicle subsidiary of Amazon.com Inc., after two incidents in which its SUVs suddenly braked and were rear-ended.

DETROIT — Federal highway safety officials want Tesla to tell them how and why it developed the fix in a recall of more than 2 million vehicles equipped with the company’s Autopilot system.