QUESTIONS ASKED Safety groups have criticized Tesla and Musk for being unclear in statements about the capabilities of its partially autonomous driving feature called Autopilot, which falls short of a full self-driving system that would have no need of driver intervention. Following a death involving Autopilot in 2016, the National Transportation Safety Board, which investigates accidents, faulted Autopilot for lacking system safeguards. The documents revealed that NHTSA sent Tesla at least five subpoenas from April 2018 through March 2019 related to vehicle crashes, with a request for information about another crash sent in June. At least three of those crashes, which occurred during the last years, caused fatalities: in Delray Beach and Key Largo, Florida and in Mountain View. It was unclear from the documents whether Autopilot was engaged. Tesla shares were up about 1 per cent on Wednesday afternoon at USD 232.92.