Cruise, the self-driving car subsidiary of GM, has been asked to reduce its robotaxi fleet by 50% in San Francisco following a crash Thursday night with a fire truck.

The California Department of Motor Vehicles, the agency that regulates the testing and deployment of autonomous vehicles in the state, requested the reduction in operations. The state agency said it is investigating “recent concerning incidents” involving Cruise vehicles in San Francisco. It called for Cruise to reduce its fleet by 50% and have no more than 50 driverless vehicles in operation during the day and 150 driverless vehicles in operation at night until the investigation is complete.

“Safety of the traveling public is the California DMV’s top priority,” the DMV said in a statement issued Friday evening, adding that it has the right, following the investigation to suspend or revoke testing and/or deployment permits if it determines there’s an unreasonable risk to public safety. “The primary focus of the