Tesla Inc. is set to unveil an electric tractor-trailer this fall, the company’s top executive announced Thursday.

Tesla CEO Elon Musk Elon Reeve MuskWould becoming one of the first people to settle Mars be worth dying for? Hillicon Valley: Twitter flags Trump campaign tweet of Biden clip as manipulated media | Democrats demand in-person election security briefings resume | Proposed rules to protect power grid raise concerns Apple, Tesla stock splits surge market caps MORE said the reveal was slated for September, tweeting, “Team has done an amazing job. Seriously next level.”

Musk first teased plans for such a vehicle nearly a year ago. The project was floated in Musk’s second "master plan," which was posted on Tesla’s blog last summer when the semitrailer was still in the early stages of development.

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“We believe the Tesla Semi will deliver a substantial reduction in the cost of cargo transport, while increasing safety and making it really fun to operate,” Musk said in his plan.

Musk said the company would eventually expand its inventory to include a compact SUV, a new kind of pickup truck and its affordable Model 3 vehicle. Tesla also plans to offer some sort of ride-hailing service.

“We plan to address most of the consumer market,” he said.