What triggers an emergency brake and what should operators do?

• A. A routine station stop.
• B. A scheduled maintenance alert.
• C. Sudden safety hazard; operator or automatic system triggers; occupants must remain calm and evacuate if needed.
• D. A door misalignment detection.

Answer: (C)

Emergency braking is meant for immediate safety threats. It can be activated by the operator pulling the emergency brake or by automatic safety systems that detect a sudden hazard. When this happens, the priority is to bring the train to a stop as quickly and safely as possible, and then passengers and crew should stay calm and evacuate if directed or if the situation requires it.

Routine station stops are planned events and do not trigger an emergency stop. A scheduled maintenance alert signals a non-immediate maintenance issue, not an urgent threat. A door misalignment detection might prevent doors from closing or trigger a precautionary stop, but it does not by itself indicate a sudden safety hazard demanding an emergency brake.