Assertion: bus's door | /r/Causes | a brake locking mechanism
Facets:
value: to prevent it
type: PURPOSE
value: on the bus
type: LOCATION
Source sentences:
text: Unlocked or open doors, will trigger a brake locking mechanism on the bus to prevent it from moving while someone could possibly be entering or exiting the bus, when the door is closed, the lock will release, this is mostly implemented on rear doors, not really on front doors, since the driver will be paying attention to the front door.