What action should be taken if Stop and Stay cannot be released?

When Stop and Stay cannot be released, the appropriate action is to notify the Trainmaster and wait for instructions. This procedure is critical in ensuring safety and proper management of train operations. The Trainmaster has the authority and expertise to assess the situation and determine the best course of action, which might involve conducting an investigation or coordinating a safe resolution.

By notifying the Trainmaster, the crew ensures that they are following established protocols for handling situations where signals cannot be released. This practice prevents potential hazards that could arise from acting without guidance, such as proceeding with caution or switching to ATC mode without understanding the full context of the situation.

In scenarios like these, it is essential to maintain clear communication with supervisory personnel to ensure safety, adherence to operational standards, and to effectively manage any emergency or unusual situation that might be present.