Paragraph 29 B. Conditions and Requirements to be observed by the Operator.
When the ‘lower’ push-button of the control point is pressed the sequence of events to close the crossing to road traffic shall begin. The sequence shall be:—
(a)
The amber lights shall immediately show and the audible warning shall begin. The lights shall show for approximately 3 seconds.
(b)
Immediately the amber lights are extinguished the intermittent red lights shall show.
(c)
4 to 6 seconds later the left hand side barriers shall begin to descend and shall take a further 6 to 10 seconds to reach the lowered position.
(d)
The right hand side barriers shall then begin to descend taking 6 to 10 seconds to reach the lowered position.
(e)
The audible warning shall stop when all the barriers are fully lowered.