Any kind of self-driving system that is going to be usable and safe in the real world needs to be able to deal with the kind of roads we have in the real world.

Any kind of self-driving system that is going to be usable and safe in the real world needs to be able to deal with the kind of roads we have in the real world. Maybe one day, when the majority of cars are self-driving, road design will change. To get there, self-driving cars will need to prove themselves on today's roads so people will buy them.