Reflective road studs may be used with white lines.

  • 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.
Rule 132: Reflective road studs mark the lanes and edge of the carriageway
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