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PORTLAND, Ore. — New U.S. tariffs on steel and aluminum imports could ultimately raise the price of trucks sold in the United States, top executives at the world’s largest commercial vehicle manufacturer warned.

Daimler Trucks North America introduced two new connectivity services into its Detroit Connect portfolio, Detroit Connect Direct and a wireless in-cab device connection.

Nikola Motor Co. is starting the hiring process to staff its new Arizona research and development center, slated to open in November.

Allison Transmission Inc. has partnered with multiple North American telematics service providers to deliver transmission-health information by year-end.

Electric car maker Tesla Inc. is laying off about 3,600 workers mainly from its salaried ranks as it slashes costs in an effort to deliver on CEO Elon Musk’s promise to turn a profit in the second half of the year.

In an abandoned lot on the outskirts of Sacramento, Calif., R1, a domed gray vehicle half the size of a Toyota Corolla, is practicing driving itself. It stops at stop signs, yields to people, and handles sharp turns, as other self-driving vehicles do on test courses in Silicon Valley, Detroit, and China.

The U.S. trucking industry is continuing to adjust to the federal electronic logging device mandate that took effect late last year.

A Starship landed in Jacksonville, Fla. But there were no aliens on board, just 40,000 pounds of reef-building material hauled cross-country in an experimental lightweight truck with streamlining everywhere.

General Motors Co. and Alphabet Inc.’s Waymo rocked the auto industry last week with self-driving deals that will have each deploying thousands of robo-taxis onto U.S. roads over the next 18 months. Ford Motor Co., meanwhile, will continue biding its time.