I could be wrong, but my understanding is also that fatalities per event tends to be in the low single digits. There are just a high number of fatal collisions.

I could be wrong, but my understanding is also that fatalities per event tends to be in the low single digits. There are just a high number of fatal collisions. That, of course, makes sense if cars generally have 1 or 2 occupants and accidents are usually single or dual vehicle. It would make more sense for self-driving busses to be touted for safety and the trolley problem instead (though, granted, they may be far less likely to be in accidents already, having professoinal drivers).