What can cause a train to stop in MATC mode while in motion?

A train operating in MATC (Multiple Unit Automatic Train Control) mode can stop due to an emergency brake application, which is a designed safety feature to bring the train to a halt in critical situations. This mechanism is activated under specific conditions such as detecting an unsafe scenario or when there is an urgent need to stop the train immediately, regardless of external controls.

The emergency braking system is a crucial safety measure that ensures passenger safety and operational integrity in case of unforeseen circumstances, such as obstacles on the tracks, severe operator input errors, or signal failures. When triggered, the emergency brakes override other controls to ensure the train stops quickly and efficiently.

In contrast, while operator error, track obstructions, and signal malfunctions can potentially lead to issues during train operation, the immediate stop of a train in MATC mode specifically due to an emergency brake application directly reflects the proactive safety responses built into train control systems.