General Motors’ Cruise autonomous vehicle unit has agreed to cut its fleet of San Francisco robotaxis in half as authorities investigate two recent crashes in the city. The state Department of Motor Vehicles asked for the reduction after a Cruise vehicle without a human driver collided with an unspecified emergency vehicle on Thursday. [time-brightcove not-tgx=”true”] “The DMV is investigating recent concerning incidents involving Cruise vehicles in San Francisco,” the DMV said Saturday in a statement to The Associated Press.