The Tunnel Musks Tunnel

There was a guy who had this idea of taking the railroad in for structure, some of which is underground, and using that to build out a linear city. And it sounds almost like science fiction, but it's like, what we'v have all this imperstructure. So i don't knowi it be interesting to think about if we're at a moment when we can take our auto intrstructure and retrofid it. That seems to me to be something that has possibility.