California on Tuesday ordered General Motors' Cruise unit to remove its driverless cars from state roads, calling the vehicles a risk to the public and saying the company had "misrepresented" the safety of the technology.

California's Department of Motor Vehicles (DMV) said it suspended Cruise's autonomous vehicle deployment and driverless testing permit, ending efforts by the company for the time being to test the cars without safety drivers.

"Based upon the performance of the vehicles, the department determines the manufacturer's vehicles are not safe for the public's operation," the DMV said in a statement, citing "an unreasonable risk to public safety."