Obviously any driverless car is not going to rely on street markings and signage alone. It's going to have sensors in all directions and see that a vehicle is h

Obviously any driverless car is not going to rely on street markings and signage alone. It's going to have sensors in all directions and see that a vehicle is headed toward the intersection at a speed which suggests it will not be able to stop in time to avoid a collision. That doesn't require some magical machine learning algorithm, and it will probably watch for this better than humans do. We tend to assume everyone else is following the rules and often don't notice when someone is about to run the stop sign and hit us.