What this sign means
To inform you that the traffic signals on this route are coordinated and that the signals will be green at all the subsequent intersections if you maintain the indicated speed.
This is a traffic signal — a light-based control that tells you when you may go, must stop, or should proceed with caution. When you see it, work out what it changes about your driving — your speed, your position on the road, or what you are allowed to do next — and act early rather than late.
Where you will usually find it
Traffic signals appear at intersections, pedestrian crossings, level crossings and lane-control points. They manage conflicting streams of traffic — and remember the golden K53 rule: a traffic officer's hand signals override any signal or sign.
How it comes up in the exam
This sign appears in 1 practice question on this site. Test yourself:
Know them all?
The exam has 28 road-sign questions and you need 23 right. Drill the signs until they are automatic.
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