What action must be taken if the Emergency Stop Button is activated?

When the Emergency Stop Button is activated, conducting a system review and reset is crucial for ensuring safety and restoring normal operations. This action allows the operator to assess the reason for the emergency stop and verify that it is safe to resume operations. It ensures that any issues that led to the activation of the Emergency Stop Button are identified and resolved before the vehicle can be moved again.

This process typically involves checking various system diagnostics and confirming that all safety interlocks are functioning properly. Once the review confirms that it is safe to continue, a reset of the system can be performed, allowing the train to resume movement.

The other actions mentioned may be relevant in different contexts but do not address the immediate requirement following an Emergency Stop Button activation. For example, keeping the vehicle stationary is a natural consequence of the button being pressed, but it alone does not allow for the verification of safety and operational integrity needed to proceed. Immediate evacuation may not be necessary unless there are additional immediate hazards present, while relaying the status to a head office might be part of protocol but does not directly address the steps needed to ensure the system is ready to operate again.