"My daydream" A fantasy map for CTA. The lines are all there, some stations and their names aren't.
A real fantasy map would have many deep bore four track subway tunnels. This isn't that out there- call this "accountant fantasy."
Click on the map or, go here to read about the rationale behind of some of these lines. Most of it makes sense, seriously. I spent untold hours scouting this out.
Official people have some similar ideas. I think mine are better, if more expensive. Scroll down to the transportation PDF's.