Green road studs mark the edge of a main carriageway at lay-bys and slip roads. Which statement is correct?

Green road studs mark the edge of a main carriageway at lay-bys and slip roads. Which statement is correct?

• A. mark the left edge of the road
• B. mark the central reservation
• C. mark the edge of the main carriageway at lay-bys and slip roads
• D. mark lanes or middle of the road

Answer: (C)

Green road studs are used to show the edge of the main carriageway at lay-bys and slip roads. This gives you a clear cue where the main road ends and the exit or lay-by begins, helping you stay in the correct lane when approaching or leaving junctions—especially at night or in poor visibility. The other boundaries you might see are indicated by different colours, but green studs specifically identify the edge of the main carriageway at those junctions.

Green road studs are used to show the edge of the main carriageway at lay-bys and slip roads. This gives you a clear cue where the main road ends and the exit or lay-by begins, helping you stay in the correct lane when approaching or leaving junctions—especially at night or in poor visibility. The other boundaries you might see are indicated by different colours, but green studs specifically identify the edge of the main carriageway at those junctions.