I’ve near completed planning my expanded railway. This will take up about 1/3 my basement approx 16″ x 18″.
This will be a multi-deck “around the wall” layout with a partial “no-lix” to get from the main deck to upper deck.
Here’s a first (discarded) attempt. Not shown are about 30 iterations before and after.
First attempt at layout design
Here’s a more complete nearly final plan for the main deck. Black rails are ‘on the flat’ … blue is a 2% grade going to the upper deck.
Plan #2 for mainlines.