Why?
The current tram system takes up a lot of surface space, that would be more well used for other things. Also metros are cool
How?
Simple build a couple of metro stations and connect them with tunnels. We can also move some water elevators to the metro stations which will make the surface (especially blair mountain str) look much nicer.
Who?
i can do most of the world
Layout
here is a layout of my suggestion for a metro system https://imgur.com/AQdYYWG
Those thing shouldn’t be a problem, the beach mine will be below it anyways and going thru it isn’t a problem either. The machine room will be moved a bit, but there is not much in there yet so it will be a small amount of work to move it.