...self-driving cars were five times as likely to crash as conventional ones, and their passengers were four times as likely to get injured (with 3.29 injuries per million miles, compared to only .77 injuries in regular cars). Self-driving cars were also rear-ended 50% more often than traditional vehicles. [...]
Still, in spite of the self-driving cars’ high accident rate, the [study] authors agreed that self-driving cars were not to blame in any of their crashes, and also found that injuries in those incidents tended to be less serious than in regular car accidents.
Finally, self-driving cars actually have a lower fatality rate, with zero deaths resulting from their crashes.