GM is Now Testing 100 Self-Driving Cars in California by Jason Siu October 6, 2017October 6, 2017 Share Comments Cruise Automation has more than doubled its fleet in the past three months. Cruise is General Motors’ self-driving unit, acquired early last year as the American automaker works on accelerating its autonomous vehicle development. According to a GM spokesman, Cruise has increased its fleet to 100 self-driving prototypes during the past three months, compared to the previous 30 to 40 units. The company is testing the self-driving Chevrolet Bolt electric vehicles in San Francisco, California and has reported a total of 13 collisions to California regulators this year, with six of them coming last month. Cruise said those six accidents involved other cars and a bicyclist hitting its test cars. “All of our incidents this year were caused by the other vehicle,” Rebecca Mark, spokeswoman for GM Cruise, told Reuters. None of the accidents resulted in injuries or serious damage. In addition to testing in San Francisco, Cruise Automation also announced late last year that it would test its self-driving cars in Scottsdale, Arizona.