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Anon

Can you tell me what the significance of green cats eyes are (road markings, not feline)?

Andria

From the "Ask Jack" archives - 19 October 2009

jbiddle

After much investigation I have come up with the following explanation;

The use of green retro-reflective raised pavement markers (RRPMs) is restricted to 'mark the presence of a culvert or other drain under the road'.