Alr I know this might get a lot of hate but just hear me out. If the map ever gets revamped and becomes a lot bigger, I think we should ditch the underground subway and make a tram that’s on the road.
It would make the city look a bit nicer and it could just be automated instead of Manual control.
Again this is just like a future suggestion kind of thing, basically asking ahead of time and would be nice if it was kept in mind.