The U.S. auto safety regulator said Monday that it had opened a broad investigation of the Autopilot system used in hundreds of thousands of Tesla’s electric cars.The investigation was prompted by at least 11 accidents in which Teslas using Autopilot, an assisted-driving system that can steer, accelerate and brake on its own, drove into parked fire trucks, police cars and other emergency vehicles, the safety agency, the National Highway Traffic Safety Administration, disclosed. Those crashes killed one woman and injured 17 people.Safety experts and regulators have been scrutinizing Autopilot since the first fatal accident involving the system was …
