What should a train crew do immediately after overrunning a stop signal?

Calling the train dispatcher is the appropriate immediate action for a train crew after overrunning a stop signal. This step is crucial because it ensures that the dispatcher is aware of the situation and can take necessary actions to prevent potential collisions or other safety incidents in the area. The dispatcher will coordinate further actions, instruct the crew on how to proceed safely, and may need to alert other trains to prevent additional overruns.

Reporting the situation promptly helps maintain safety standards and allows for a quick response to mitigate any risks associated with the incident. The dispatcher can provide guidance specific to the circumstances and direct the crew to follow correct emergency procedures, such as stopping the train or moving it to a safer position.

Other options, while potentially relevant to follow-up actions, do not address the immediate need for communication and safety management. Preparing to call maintenance, increasing speed, or conducting a physical inspection should be part of later procedural steps once the immediate safety concerns are communicated to the dispatcher.