A. No passing
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What does a white reflector (cat's eye) placed on the road mean?
A. No passing
B. Fire hydrant
C. White marks the left side of the road
D. White marks the centre line
New Zealand conforms to the same standards as the UK and Australia on the positioning of road studs by using white studs to mark the centre line of a single carriageway, or to delineate lanes on a dual carriageway or motorway.
Cat's eyes are also called road studs or retroreflective raised pavement markers (RRPMs). There are several types of cat's eyes used on the roads in New Zealand and they serve three purposes.
Visual lane marking - using white in the middle and red on the left edge means that road users can follow these to stay in the lane. Using yellow where there are yellow no overtaking lines add visual reinforcement to the rule.
Tactile lane marking - if you drive over the road studs, you can feel it through your vehicle's suspension and steering, therefore it's a tactile reminder that you are straying from your lane
Special feature marking - fire hydrants are marked with blue road studs and, in some areas, culverts and drains are marked with green road studs.
The following photo shows a yellow road stud between double yellow no overtaking lines.
