Plus, there will be far fewer variables when humans aren't allowed to drive outside of race tracks and the like. Reason why fully AI cars are a bad idea right now is because of all the chaotic human drivers that react in nonsensical ways. e.g. Pedestrian steps out. Thing that makes sense is for the AI to stop the car. But then the driver behind them decides to swerve around and blare the horn, then see the pedestrian, freak, turn into the AI car, and an accident is caused. Without the human drivers, then all the vehicles can communicate with each other and all of them can react in appropriate ways, adjusting how they drive up to miles back