How should trains or engines behave in the presence of a stop signal at restricted speed?

When a train or engine approaches a stop signal while operating at restricted speed, it is critically important to stop before reaching the signal. This ensures that the crew has time to assess the situation and follow any necessary protocols to address the signal's indication, which indicates that the train must halt. Stopping allows for safe operation and compliance with rules that prioritize safety at intersections or crossings that may be ahead, as well as any other potential hazards in the area.

Restricted speed implies that the train must be ready to stop short of any obstruction, including signals, and stopping at a stop signal is a key component of adhering to this operating procedure. This approach helps maintain overall safety in train operations and allows proper responses to any potential obstacles or signals that may change.