There are a number of schemes designed to move cars around a model railroad, but I prefer the time-tested 4 cycle waybill popularized by Doug Smith in the 1960s. I have used this system since we began operations on my Bluff City Southern in 1999 with great results. It’s just plain fun, and never the same.
Here is the diagram for Bridge Junction on Allen’s Bluff City Southern. In earlier blogs Kevin Kizer and I installed the approach signals and the train order signal inside the wye. Kevin, a retired signal maintainer, determined that we needed dwarf signals at the 3 locations marked 1,2 and 3. Location 1 is the lead to Bluff City yard. Location 2 is the lead to the coach yard and location 3 is the lead to the engine service facility inside the wye itself. Kevin said the signals will tell the engineer if the switch is aligned properly to exit the location.