 In June 2015, the team announced that their vehicles had driven over , stating that this was "the equivalent of 75 years of typical U.S. adult driving", and that in the process they had encountered 200,000 stop signs, 600,000 traffic lights, and 180 million other vehicles.Google also announced its prototype vehicles were being road tested in Mountain View, California.During testing, the prototypes' speed did not exceed and had safety drivers aboard.