If a train or engine stops at a Stop Signal and no other movement is evident, what is the first action a crew member must take?

When a train or engine comes to a stop at a Stop Signal with no other movement evident, the first action a crew member must take is to immediately contact the Dispatcher. This is crucial because the Dispatcher has the responsibility of managing train movements and can provide the crew with critical information about the situation ahead, including reasons for the stop or instructions on what to do next. Prompt communication ensures safety and adherence to operational protocols, as the Dispatcher may need to assess the situation and determine the correct course of action.

In circumstances like these, waiting too long or trying to investigate without proper direction could compromise safety and efficiency in train operations. Other options, such as checking the signal log or contacting the nearest station, do not provide immediate assistance in this critical moment. Instead, the Dispatcher’s guidance is essential for safe and coordinated movements on the track.