Originally Posted by Christopher2035:
... Ace - how tight would that reverse loop curve have to be?
Chris, I drew that previous D-132 estimate with all O31 curves. I think it would be more fun if it had reversing for both directions, although this would involve a bunch of switches in tunnels, but it would keep people guessing where the train is going to come out ...
Drawn with tunnels open and upper level omitted for clarity.