Count Down Marker 300 yds Post Mounted Sign - Diagram 823 R2/RA2 (Face Only)This distance marker features three white bars on a coloured background. Each bar represents 100 yards to the next junction or roundabout, giving drivers warning that they will need to slow down. They are seen on all roads from motorways in blue, and A roads and dual carriageways in green. This countdown sign face 823 is available in three colours, these are white with a blue background, white with a green background, or black with a white background.