Have you ever seen a car try to go through a yellow light, it turns red just a hair too soon, and the car decides to hit the breaks. Often times the car ends up well into the intersection and they have to back up, forcing the cars behind them to do so as well. I’m not defending the action of that driver who ends up in the intersection - they are obviously in the wrong. However, having a car stopped in the middle of the intersection is a dangerous situation, the other human drivers recognize that and reluctantly back up.

Driverless software must recognize situations like this and adapt in order to win the future. We will not go from manually operated cars to 100% driverless cars overnight. They will have to prove their worth and/or superiority alongside human drivers for a long time.