For a continuing investigation of 830,000 Tesla vehicles, US auto safety regulators are looking for new responses and recent data.

 also the advanced driver assistance system Autopilot from the manufacturer.

On July 3, Tesla received a letter from the National Highway Traffic Safety Administration (NHTSA).

Requests for response from Tesla were not answered.

After discovering more than a dozen crashes, the government is looking into the effectiveness of Autopilot.

Tesla cars collided with stationary emergency vehicles in these accidents.

The goal of autopilot is to allow vehicles to automatically steer, accelerate, and brake inside their lane.

 while improved Autopilot can help with lane changes on highways.