I wonder what range in safety we tolerate in human drivers? How much worse than the average is a newly-licenced 17 year-old (or whatever age) or an 80 year-old?
Well, in terms of overall crashes and injury crashes, you don't get safer than the 80 year old until you're 30 [1]. Though the rate of fatal wrecks is about the same between 16-17 and 80+. I think that may be due in large part to the fact that 80 year old humans are far more fragile and likely to die in a wreck where a younger person would walk away from.
