What is the purpose of the interlock system in a transit coach?

The interlock system in a transit coach serves a critical safety function, primarily ensuring that the vehicle cannot operate with the doors open. By design, this system prevents the engine from starting or the vehicle from being driven while the doors are in an open position, thereby protecting passengers from potential accidents that could occur during boarding or alighting.

The significance of the interlock system is paramount, as it emphasizes the importance of passenger safety. When doors are open, there is a risk of injury to passengers and individuals near the coach, particularly if the vehicle were to move unexpectedly. This safety measure helps reduce the occurrence of dangerous situations, ensuring that doors are securely closed before the vehicle can commence its journey.

Other alternatives address functionalities that may seem related but do not encapsulate the core purpose of the interlock system as effectively. While automating door functions and controlling passenger flow can enhance operational efficiency, those features do not fundamentally focus on the immediate safety of passengers boarding or exiting the bus.