In T/O territory, how are Yard Limits determined?

In T/O territory, Yard Limits are determined by Yard Limit board signs. These signs indicate the boundaries within which a train can operate without requiring specific authority from the signaller or dispatcher for movements within those limits. The presence of these boards provides clear guidance and establishes a defined area where train drivers must adhere to particular operating procedures, ensuring safety and communication within the yard area.

Signal lights, while important for various aspects of train operations, do not specifically define Yard Limits. They are more commonly associated with controlling train movements on the main line and do not serve the same purpose as Yard Limit board signs. Similarly, the length of the train and the distance to the nearest station are not criteria for establishing Yard Limits; these elements pertain more to train operations and logistics rather than the defined boundaries of yard operations.