The interlock system for the brake and accelerator on a transit coach may be used:

Question

Accepted Answer

B: As a safety feature when the exit door is open.. The brake and accelerator interlock system hold the throttle in the idle position while applying the brakes whenever the exit door is opened. This safety procedure ensures that the vehicle does not move as passengers enter and exit. This feature should never be used as a parking brake.

The interlock system for the brake and accelerator on a transit coach may be used:

Tennessee CDL Passenger Test Info