Y
Y Switch	A switch that turns off at both sides, but not straight ahead.
Yard	A system of tracks within defined area limits for the making up of trains, storing of cars, and for other purposes. (Boomer's version "System of rust surrounded by fence and inhabited by a dumb bunch of natives who will not let a train in or out.")
Yard Engine	An engine assigned to yard service.
Yard Goat	Switch engine.
Yard Limits	The main track area between Yard Limit signs as designated in the Timetable. Movements of trains must be made at Restricted Speed within Yard Limits.
Yardmaster	A railroad employee in charge of a yard operation.
Yaw Dampers	A truck-mounted spring, that prevents excessive rocking of a moving locomotive or car.
Yellow Eye	A slang term for a yellow signal.