Far fetched? My jaw drops. It's a moving block signalling system with 1 car trains. This stuff has been in service for decades pretty much all around the world. As for the very concept of the boring company, Elon Musk has it completely wrong. It's not the tunnel that takes so much time to dig, it's the vertical shafts for the stations, especially in the city, because of the things that have to be moved aside, and also because of the precautions you must take to, err, avoid collapsing buildings and stuff. Really, there are things where he knows what he is talking about, but mass transit is not one of them.
I'm still one of those people who really wanted a segway-city. I still have hopes people will build new cities where there is currently no infrastructure. Maybe under there, people can build those hyperloop things.
