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Tesla Inc. hasn’t thrown its plan to demonstrate an autonomous cross-country drive out the window — it’s just tapped the brakes.

A second federal safety agency has opened an investigation of an accident in which a Tesla car on “Autopilot” rammed into a parked fire truck.

The U.S. National Transportation Safety Board is gathering information about an accident involving a Tesla Inc. Model S sedan that rear-ended a firetruck on a freeway near Los Angeles on Jan. 22, the agency said.

The market for the Tesla Class 8 truck keeps growing as UPS Inc. put in an order for 125 electric trucks, the largest order to date that has been made public.

Tesla Inc.’s superstar chief executive Elon Musk unveiled a futuristic looking electric semi truck last week that surpassed analyst expectations and weighed heavily on the shares of truck and truck component makers.

HAWTHORNE, Calif. — Tesla’s success in the passenger-car arena has changed consumers’ perceptions and pushed the limits of what’s possible with electric cars.

Customers are starting to place orders for Tesla Inc.’s new all-electric Semi truck, with retail giant Wal-Mart Stores Inc. preordering for both its U.S. and Canadian units.

Tesla unveiled its highly anticipated electric-powered semi-truck on Nov. 16, 2017. Here are its first public moments and the introduction by company co-founder Elon Musk. (Seth Clevenger/Transport Topics)

HAWTHORNE, Calif. — Tesla Inc. has unveiled its long anticipated, all-electric Class 8 tractor, marking the electric car maker’s entry into the commercial truck industry and reinventing the heavy-duty truck as we know it.

Tesla Inc. is finally ready to introduce its first all-electric heavy-duty truck. In the works for two years, it’s a project that’s aimed squarely at cleaning up the freight industry, which accounts for one-fifth of global oil demand.