Adding to my original rectangular layout.
It was mainly a yard with two outer loops.
Expansion with be multi layer mountainous terrain with tunnels, coal mine and logging.
Separate loops for mining trains.
Parallel bridges with join 4' double track truss bridge that will continue the around the wall theme and terminate with a turntable roundhouse surrounded with 0-72 loops. Will re-roll one set so inner loop remains parallel to outer. Maybe O-66.
FMH
