17.4 in every 100,000. That's pretty good already. In Germany that number goes down to less than 5, btw., and we still have no speed limit in many parts of our highway system.
But yeah, road safety is a huge thing. New coaches in Germany actually have to have automated braking systems, just like trucks, among a plethora of other assistance and safety features. I'm a bit sceptical when it comes to autonomous driving, though. Cars, like other IoT devices, are notoriously unsafe when it comes to connection, and hacking will become a huge issue once this becomes widespread. Also, some people like to drive on their own and at their own pace. Problem is that once autonomous cars become widespread, insurance companies will force you to use those by adding HUGE premiums on driving for yourself. And governments will LOVE being able to stop your car really easily. Oh yeah, all the secret services will want backdoors to your fancy self-driving car, of course, because terrorism and so on.
Purely autonomous cars that do not allow the "driver" to do anything will take a huge amount of freedom away from the people. Not to mention that they'll be an even better tool for surveillance than our current cars.