Flashing light Warning Signals commence to operate when a Train reaches a
predetermined Warning distance from the Active Control Level Crossing. This varies to
provide an adequate Warning period appropriate to Track Speed.
If there is a road junction controlled by traffic lights in close proximity to the Active
Control Level Crossing, an additional advanced Warning is provided to the traffic light
controller. This is to ensure coordinated operation of the traffic lights and Active Control
Level Crossing.
Where boom gates are provided in conjunction with flashing light Warning Signals, the
operation is as follows:
when the Train reaches the predetermined Warning distance, the flashing light
Warning Signals will operate and bells will ring, and a white flashing side light will be
exhibited to the Rail Traffic Crew;
approximately six to ten seconds later the booms will commence to descend to form
a barrier across the roadway;
when the booms are fully lowered, the bells may cease to ring but the Warning lights
will continue to flash;
when the Rail Traffic is Clear of the Active Control Level Crossing, the booms will
automatically rise to the vertical position; and
flashing lights will continue to flash until the booms returns to a vertical position.