Fixed rail is not a perfect solution, either. Nor are millions of mopeds. Same goes for articulated buses, or hang gliders. But be patient. Let more pieces eme

Fixed rail is not a perfect solution, either. Nor are millions of mopeds. Same goes for articulated buses, or hang gliders. But be patient. Let more pieces emerge. Let things evolve. Maybe driverless cars will evolve into passengerless engines. Then people own their own passenger cars that are engineless and just hop from one conga line to another to get to their destination. Once you have driverless solved, you might increase traffic density immensely. Maybe safety goes way up and you can reduce the weight of these vehicles by 500kg. So fuel consumption drops dramatically, road wear drops dramatically, etc. Maybe it allows ambulances to fly down roadways because computers are way better at getting out of the way. Maybe it causes the auto industry to collapse because we go from 3 autos per home, to 0.8 cars per household because you can just summon one whenever you want. Maybe it doesn't do any of this. The Pony Express was revolutionary, but only lasted 18 months before the telegraph sent it into the history books. Now we have pocket phones. So was the Pony Express a stupid innovation? Or does progress move in zigzag lines?