Final Answer:
The motorman must signal for a signal maintainer and call the desk trainmaster when, after standing awhile, the home signal does not change within 15-160 seconds.
Step-by-step explanation:
When a train is stopped at a home signal, the motorman must be aware of the time it takes for the signal to change. If the signal does not change within 15-160 seconds, it indicates a potential issue with the signal system. This time frame is crucial for ensuring the safe and efficient movement of trains. If the signal does not change within this time range, it could signify a malfunction or obstruction that needs to be addressed promptly. Therefore, signaling for a signal maintainer and calling the desk trainmaster becomes necessary to investigate and resolve any potential safety hazards or operational disruptions.
In railway operations, precise timing is essential for maintaining safety and efficiency. The 15-160 second time frame serves as a critical threshold for identifying abnormal signal behavior. It allows for timely intervention in case of any irregularities, preventing potential accidents or delays. By promptly involving the signal maintainer and trainmaster, any issues with the home signal can be addressed and rectified, ensuring the smooth flow of train operations.
Ensuring that home signals function within the specified time frame is vital for maintaining railway safety standards and operational reliability. The protocol of signaling for a signal maintainer and contacting the desk trainmaster under these conditions underscores the commitment to proactive maintenance and swift resolution of any signal-related issues.