US government asks Tesla for detailed information about how Autopilot system works

An investigation was launched into Tesla’s driver assist systems following a series of collisions (Steven Senne/AP)

The US government’s highways safety agency has requested detailed information about how Tesla’s Autopilot system detects and responds to emergency vehicles parked on roads.

The National Highway Traffic Safety Administration (NHTSA) made the request in an 11-page letter sent to the electric carmaker.