Reflective road studs

Question 1

white studs

Answer 1

mark the lanes or middle or road

Question 2

red studs

Answer 2

mark the left edge of the road

Question 3

amber studs - where

Answer 3

mark central reservation of a dual carriageway at dual carriageways or motorways

Question 4

green/yellow studs

Answer 4

mark temporary adjustments to lane layouts

Question 5

green studs

Answer 5

mark edge of the main carriageway at lay-bys and slip roads