What rule governs the procedure to pass an automatic signal at stop?

The procedure to pass an automatic signal at stop is governed by Rule 253. This rule outlines the specific steps and precautions that must be taken by train crews when encountering an automatic signal that displays a stop indication. The intent is to ensure the safety of train operations by mandating that the crew must take a careful approach, assess the situation, and communicate with relevant personnel if necessary.

Rule 253 is designed to prevent accidents by establishing a clear protocol for passing signals at stop, including slowing down the train and ensuring it is safe to proceed. This might involve looking for signals from other trains, assessing the track ahead, and ensuring that no conflicting movements are taking place. Following this rule is critical for maintaining safe rail operations.

In contrast, other rules, while they may pertain to the operation of trains and signals, do not specifically address the circumstances and procedures involved in passing a stop signal. Thus, Rule 253 stands out as the correct guideline in this situation.