Paragraph 11 I1

the amber lamps shall immediately show, and the audible warning shall begin. The lights shall show for approximately 3 seconds;

immediately the amber lamps are extinguished the intermittent red lights shall show;

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;

all boom lights shall illuminate when the first barrier moves out of the fully raised position;

once the entrance barriers have reached the down position the right-hand side barriers shall then begin to descend taking 6 to 10 seconds to reach the lowered position;

the audible warning shall stop when all the barriers are fully lowered;

the train can then approach and pass over the crossing.