Specifications

Trouble-shooting guide
Problem Possible cause Remedy
Very long vehicular queues Maximum Green setting needs See page 10
adjusting
Faulty detector (MVD) Call service engineer*
Too many vehicles Discuss with relevant
traffic authority urgently
Green period always same length Maximum Green setting needs See page 10
adjusting
Faulty detector (MVD) Call service engineer*
Low vehicular density No action required
Vehicles still in shuttle lane Vehicles entering shuttle lane If frequent, report facts to
at start of next green after start of red the police
All-Red too short Increase setting
Obstruction in carriageway Clear obstruction
* The signals may need to be controlled by using MANUAL or FIXED TIME, depending on the
severity of the problem.
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