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WASHINGTON — As autonomous vehicle testing advances without cohesive federal guidelines, companies are operating under inconsistent or nonexistent rules for how and whether a vehicle is monitored and controlled on the road.

Electric vehicle stocks, which were hit hard this year as investors shifted out of growth industries, are getting a boost as President Joe Biden mounts a major push to accelerate the adoption of battery-powered cars, and Chinese peers report strong March sales.

Autonomous delivery services — and the challenges they present — are included as a consideration in the Connecticut Department of Transportation’s recently released strategic plan for connected and automated vehicles.

A grand opening was held March 16 for the four-story, $75 million, 134,000-square-foot Ford Motor Co. Robotics Building at the University of Michigan.

Impact of automation on the transportation workforce will be “extremely real and broad," FMCSA acting Administrator Meera Joshi says.

New Mexico legislators have introduced a bill that one says would set up in statute the authority to regulate and give guidance to the emerging autonomous vehicles industry.

Electric-vehicle maker Workhorse Group Inc. plunged on Feb. 23, triggering multiple trading halts, after a key U.S. Postal Service contract that some had expected it to win went to rival Oshkosh Corp. instead.

Electric aircraft such as drones could account for 30% of same-day package deliveries by 2040 as network scale dramatically brings down costs, according to L.E.K. Consulting.

House Ways and Means Chairman Richard Neal unveiled plans to pursue tax breaks for renewable energy as a way to ease the shift away from fossil fuels in President Joe Biden’s upcoming infrastructure bill.