QUIZ: Do you know your motorway stud colours? Take our test to see if you’re on the right track or heading for trouble

Take our test to see if you know what the colours of motorway studs mean for drivers. Mistaking these in fog, heavy rain or other poor driving conditions could spell trouble.

Why cats eyes are so smart

Put simply, cats eyes are just reflectors sitting on the road to help keep drivers on the black stuff – but in reality, they are so much more. Here’s a quick guide to why they’re such a smart design.

Meet the clever cats

Meet the clever cats

What coloured motorway studs mean

How did you get on in the test? Not quite so well? Here’s the information you need.

White studs mark the lanes or the middle of the road.
Red studs mark the left edge of the road.
Amber studs mark the central reservation of a dual carriageway or motorway.
Green studs mark the edge of the main carriageway at lay-bys and slip roads.
Green/yellow studs indicate temporary adjustments to lane layouts, e.g. where road works are taking place.


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