For me the corollary of this ("you just invented a more expensive railway") is the business model assumptions that go away. Long distance trucking is still a l

For me the corollary of this ("you just invented a more expensive railway") is the business model assumptions that go away. Long distance trucking is still a likely winner, but there is still the "last mile / last off ramp". None of the business models touted today survive the new railway problem. That's not to say it's not a valuable technology - it's just we cannot whistle up a human shaped robot that just does what we want. In the same way a machine is shaped by its function, our cities and infrastructure green will be shaped by their function. Disneyland is built one level up, so that all the service tunnels (with I am sure some self driving robots) can get around without getting in the way of people. Whatever we rebuild our (climate neutral) cities to be, i think less surface space given to transport will be high