As I recall there were collisions where the autonomous car was sitting still. Others while in manual mode. Zero the fault of autonomous drivers, so far.
~33K [1] deaths a year from car accidents currently due to human drivers. I doubt autonomous vehicles can do worse than that.
[1] http://www.cdc.gov/nchs/fastats/accidental-injury.htm
As I recall there were collisions where the autonomous car was sitting still. Others while in manual mode. Zero the fault of autonomous drivers, so far.