In the event of a signal failure, how should the crew respond?

The appropriate response to a signal failure is to follow standard emergency procedures. This is crucial because signal failures can indicate potentially dangerous situations, and standard emergency procedures are designed to ensure the safety of the crew, passengers, and the train itself. These procedures typically include steps for stopping the train, assessing the situation, communicating with relevant personnel, and determining how to safely proceed in accordance with established protocols.

Following standard emergency procedures helps maintain safety and reduces the chance of accidents or further complications. It is important for the crew to adhere to these procedures since they are developed through rigorous safety analyses and are part of the training provided to the crew.

In contrast, ignoring the signal and proceeding cautiously fails to acknowledge the potential risks associated with a signal malfunction. Contacting control for immediate instructions is a reasonable measure but typically forms part of the emergency procedures rather than being a standalone response. Resuming normal operations would be inappropriate as it disregards the critical situation presented by the signal failure and could lead to serious accidents. Therefore, adhering to the established emergency protocols is essential to ensure safe operation in the event of a signal failure.