If we really cared about using AI to promote safe driving, we would turn it away from the road and towards the human driver. Take the above scenarios. While AI driving is a difficult problem, an AI that can detect a drunk/tired/inept driver is not. Any car could easily be equipped with internal cameras or other systems to tell if a driver is unfit. Any car cold be equipped with a dead man's switch to safely deal with a driver that has fallen asleep. How about a car that calls the cops whenever it thinks its driver may be drunk? Heck, you don't need AI to install a speed governor that would curtail any and all speeding[1]. The fact that the market repeatedly rejects such simple AI implementations tells me that all-up AI driving is a long long way away.
[1] My dream is an automatic switch that turns on a police car's lights/sirens every time they break the speed limit. Why else would a marked cop car ever speed unless it was chasing someone?