Two senators urge 'thorough' U.S. agency Tesla Autopilot probe

FILE PHOTO: New Autopilot features are demonstrated in a Tesla Model S during a Tesla event in Palo Alto, California October 14, 2015. REUTERS/Beck Diefenbach

WASHINGTON (Reuters) - Two Democratic U.S. senators on Monday urged the National Highway Traffic Safety Administration (NHTSA) to thoroughly investigate Tesla Inc's Autopilot and use the review to propose improvements to its driver assistance system.

NHTSA announced Monday it opened a preliminary evaluation into 765,000 Tesla vehicles after 11 crashes involving parked emergency response vehicles.