Tesla Plans Software Update for Autopilot

Tesla Motors Inc. TSLA -1.46 % is changing the way its Autopilot system works following the fatal crash in May of a car that was driving under semi-autonomous control. The revision, which Tesla Chief Executive Elon Musk outlined Sunday, will depend more on radar signals to help guide Tesla vehicles along roadways, and adds safeguards to keep drivers engaged at high speed. The software updates will be rolled out within the next two weeks and delivered to vehicles over the air, he said. They will affect Tesla vehicles built since October 2014, before which the hardware used by Autopilot wasn't included. Autopilot, which uses cameras, radar and sensors to steer vehicles and adjust their speed, has come under scrutiny since the Florida crash that killed Tesla driver Joshua Brown in May, the first known death of a driver using the system.