Well because if we're going that way, we might as well use trains, as lots of other comments unhelpfully mentioned. The strength of a car is supposed to be that

Well because if we're going that way, we might as well use trains, as lots of other comments unhelpfully mentioned. The strength of a car is supposed to be that they are more flexible in how to go from A to B and may even stomach less than ideal road conditions. Dedicated self driving infrastructure may negate those advantages.