How will a driver know if the park brake has failed to apply?

The indication that the park brake has failed to apply is signaled by the illumination of the "Park Brake Bogie 1 or 2" on the local fault panel. This is a specific alert system designed to provide real-time feedback to the driver about the status of the park brake. When the park brake fails to apply, safety protocols activate the relevant warning lights, allowing the driver to quickly identify the problem.

Other choices may suggest signs of a malfunction, but they may not provide direct information about the park brake system's status. For instance, a loud noise may occur due to various issues, and if the train does not move, it may indicate other failures unrelated to the park brake. Similarly, a green indicator typically signifies normal operations rather than a failure. Hence, the fault panel alert is the most reliable and direct indicator of a park brake application failure.