As a human driver, when do you know to take control of the vehicle and start stopping? At 100 feet? 200 feet? 300 feet (a football field?)
A quick Google[1] suggests the average stopping distance of a human traveling 35mph is 95 feet (including reaction time.) The promise of autonomous is 60 feet. If the human decides to stop at 60 feet, it's too late. If they stop before that, how do they know if the vehicle is working properly?
If you see something and the software does not. It probably doesn't provide that sort of information to the driver though. Even then the driver probably isn't paying attention.
A quick Google[1] suggests the average stopping distance of a human traveling 35mph is 95 feet (including reaction time.) The promise of autonomous is 60 feet. If the human decides to stop at 60 feet, it's too late. If they stop before that, how do they know if the vehicle is working properly?
1. http://www.brakingdistances.com/35Mph