But am I the only one thinking that maybe we are trying to solve the wrong kind of problem? If we had spent the same amount of money into creating a grid of mi

But am I the only one thinking that maybe we are trying to solve the wrong kind of problem? If we had spent the same amount of money into creating a grid of mini-train I believe that most cities would already have some working prototype... And mini-train is a control problem that we could solve yesterday... (With mini train I mean something roughly big as a car but that is constrained to move in some predefined path, it will means that they could move way faster than cars and be more space efficients...)