What action should be taken if a train encounters a signal displaying Stop and Proceed with failed cab signals?

The appropriate action when a train encounters a signal displaying Stop and Proceed, coupled with failed cab signals, is to only proceed if specifically authorized by the Dispatcher. This ensures that all safety protocols are maintained in adherence to operating rules.

The reason this answer is correct revolves around the critical need for communication and safety in train operations. Once cab signals fail, the crew cannot rely on automated systems to determine safety; therefore, they must seek explicit permission from the Dispatcher. This authorization is crucial to protect both the train itself and other rail traffic in the area.

The process of stopping for authorization mitigates the risk of accidents and ensures all necessary precautions are taken before proceeding. It emphasizes the importance of following established protocols in scenarios where normal operations are compromised, prioritizing safety above all else.