The stop of Cruise-type self-driving sedans after a pedestrian collision in Oakland, Calif., will resume operations in California

Federal regulators are looking at the different aspects of the safety of cars. Last week, the National Highway Traffic Safety Administration opened an investigation into Cruise citing pedestrian safety concerns.

The move comes after one of Cruise’s driverless cars struck a pedestrian in downtown San Francisco earlier this month. A woman was thrown onto the road in front of a Cruise vehicle after she was hit by a human driver. The Cruise vehicle braked but then continued to roll over the pedestrian, pulling her forward, then coming to a final stop on top of her.

Despite those incidents, regulators voted in August to allow self-driving car companies to expand their operations. San Francisco filed motions with the state demanding a halt to that expansion.

Cruise has been ordered to cease operations in the state of California. The Department of Motor Vehicles said on Tuesday that it was issuing the indefinite suspension because of safety issues with the vehicles.

The Department of Motor Vehicles can suspend or wipe out permits if there is an unreasonable risk to public safety. “There is no set time for a suspension.”

A Semi-Autonomous Self-Driving Vehicle Swerved, Brake, and Collided with a Woman in Elliptical Condition, and a Charged Second Offender

“Our teams are currently doing an analysis to identify potential enhancements to the AV’s response to this kind of extremely rare event,” said Navideh Forghani, a Cruise spokesperson.

Cruise provided additional details of the October 2 collision in a blog post published today. According to the company, which has 40 cameras and sensors mounted on each of its vehicles, its self-driving vehicle quickly swerved and braked in an attempt to avoid a collision with the woman, but still made impact. The vehicle then stopped but, according to Cruise, “attempted to pull over,” dragging the woman an additional 20 feet. Cruise says this sort of evasive maneuver was built into the vehicle’s software to promote safety, and is required by both California and federal regulators.

Cruise says the vehicle then stopped again. The San Francisco Fire Department said the victim was extricated from beneath the vehicle using rescue tools, and NBC Bay Area reported that emergency responders arrived soon after. The department said that she was in the hospital with multiple traumatic injuries. The driver of the vehicle that struck the woman hasn’t been caught.