What does the rear exit door Passenger's Emergency Release handle do?

The rear exit door Passenger's Emergency Release handle is designed specifically to facilitate a safe and quick evacuation in emergency situations, making it crucial for passenger safety. When this handle is activated, it allows the rear exit door to open, enabling passengers to exit the bus swiftly. This function is especially important during emergencies, such as accidents or fires, where traditional exits may be inaccessible or obstructed.

The other options do not accurately reflect the purpose of the emergency release handle. For example, locking the doors during transit or shutting down the bus system would not enhance passenger safety in an emergency scenario. Additionally, signaling for police assistance is not the intended function of this handle and would typically require communication through other means. Therefore, the correct response underscores the essential role that the rear exit door Passenger's Emergency Release handle plays in ensuring passenger safety during emergencies.