What does a "STOP" in the Stop column of the Track Bulletin Form B indicate?

A "STOP" in the Stop column of the Track Bulletin Form B signifies that the train must not enter the specified limits without receiving explicit instructions. This indicates a critical safety measure in railway operations, ensuring that the train crew is aware of potential hazards or restrictions in the area they are approaching.

In practice, this means that before a train can proceed into an area marked with a "STOP", the crew must contact the appropriate dispatch authority or follow established protocols to obtain guidance. This procedure is vital for maintaining safety on the tracks and preventing accidents, as it ensures that the train is given the necessary information to navigate any potential obstacles or restricted zones safely.

Understanding this aspect of the Track Bulletin Form B helps train crews prioritize safety and adhere to regulations during their operation, ultimately contributing to overall operational safety standards within the rail industry.