Autonomous vehicles don't have to be autonomous everywhere and in every situation to be worthwhile. Such as the vehicle after learning your daily commute would most likely do a better job of improving both safety and traffic flow. Or for well programmed major highways to control speed, following distance, lane changes etc should make the driving experience better and safer. To think accidents will be immediately eliminated is unrealistic. However the recorded accident situation will clarify who did what and IMO will far more often point to the unsafe vehicle being controlled by a person.
