November 2, 2015:​A Google Lexus model autonomous vehicle (“Google AV”) in autonomous mode travelling northbound on Clark Ave. in Mountain View was involved in an accident. As the Google AV approached the intersection of Clark St. and El Camino Real, it activated its turn signal to indicate its intention to make a right turn on El Camino Real. The Google AV came to a complete stop at a red light at the intersection and then began to slowly advance in order to get a better view of cross traffic on El Camino Real approaching from the left to determine whether it was clear to make the right turn on red. A vehicle approaching from behind came to a stop and then rolled forward and collided with the rear bumper of the Google AV.

https://www.google.com/selfdrivingcar/reports/