Folks;
Perhaps there is some information on Inglenook Sidings somewhere on the web. It is a shunting (switching) layout that uses a system of tiddlywinks shaken in a pair of tumblers to assign the position for the cars in the outbound train, Very simple, but a lot of fun.
I built a OO version of it in the 1980s. Still have it, but don’t use it so much. (Kinda’ hard for a geezer to drag out and play with.) The track plan could easily be incorporated into a three track yard on a permanent layout. I used the short Hornby, Lima, and Wrenn goods wagons, but North Americal cars would work on longer sidings.
Best, David Meashey