AUTOMATIC CONTROL OF SIDING
I have a layout with a WYE entrance to a passenger yard track from the main line. I have designed a relay circuit that automatically controls power to the siding (block) when the turnouts that lead to the wye are set to bypass the siding. The circuit turns OFF the block power to prevent an engine from entering the WYE from the yard and causing a derailment or collision on the main line.
My layout diagram is attached.