If a bus has an emergency exit door, what must be ensured during operation?

During operation, it is critical that the emergency exit door of a bus is closed. A closed emergency exit door ensures the safety of passengers and the driver by preventing unauthorized access and protecting against potential hazards during travel. An open door could lead to accidents, injuries, or ejections of passengers, especially in the event of sudden stops or collisions.

While having a clearly labeled or easily opened door is important for safety protocols, the primary focus during actual operating conditions is ensuring that the emergency exit is securely closed. This provides a controlled environment where passengers are less likely to face danger and ensures that the emergency exit functions as intended only when necessary.