Which signal displays the immediate action required by the train operator?

The stop signal is crucial for train operations, as it indicates that the train must come to a complete halt due to safety reasons. This signal usually precedes danger such as track obstructions, upcoming switches, or other critical situations requiring the train to stop.

When a stop signal is displayed, it takes precedence over all other signals, and the train operator must immediately respond by stopping the train before reaching the signal. Compliance with stop signals is essential for maintaining safety on the rail network and ensuring that potential hazards are addressed before proceeding.

In contrast, warning signals indicate that an action may be required soon but do not require an immediate stop, while proceed signals allow the train to continue moving, and slow signals indicate the train should reduce its speed but still keep going. Understanding the significance of a stop signal is vital for the safety of the train crew, passengers, and others along the tracks.