What rule must be followed to pass an automatic signal at stop?

Passing an automatic signal at stop requires adherence to Rule 253. This rule generally outlines the procedures and precautions that must be taken to ensure safety when a train approaches an automatic signal displaying a stop indication.

Under Rule 253, the engineer is typically required to reduce speed, assess the situation at the signal, and ensure that it is safe to proceed before continuing the journey. This may involve observing for any other indicators or instructions, ensuring that the track ahead is clear, and making sure all safety protocols are followed.

This rule is crucial as it aims to mitigate the risks associated with ignoring signals, which can lead to accidents or collisions. Following Rule 253 helps maintain the safety and efficiency of train operations when encountering stop signals.