I have made a Fantasy Subway (is just a service guide right now, as I do not know how to make a map yet). This includes my (as usual) very interesting proposals. Please provide any feedback on this thread and tell me how to make it better. This subway assumes that all stops that currently only serve one train on a line serve express trains unless a local has been brought to replace the local that is actually there. The document contains rough estimations of routes, although I know where the stops are (as I said, I do not know at this time how to make a subway map), all services (including Rush Hour Variants where applicable), Yard Rosters, and Trains Per Hour.
Document-https://docs.google.com/document/d/16us6PEk_Twec1cat9detBwREz-PMZWzBURq29heMPkU/edit?usp=sharing