Two Way Traffic Post Mounted Sign- Dia 521 R2/RA2 (Face Only)
Diagram 521 is a warning for the road changing from a length of dual carriageway to a single carriageway with two-way traffic.
This may be used with plates to show the distance two way traffic will begin, "Distance Ahead" diagram 572 or "For Distance" 570 to describe for how long to expect oncoming traffic. You'd find this sign coming off of a one-way dual carriageway into single lane, two-way traffic. It should be erected after the "End of Dual Carriageway" sign and as near as possible to the start of two-way working.
The sign comes in 450mm to 1500mm. Sizing generally depends on the road condition and speed but official details can be found in the Traffic Signs Manual on our Regulations page. Contact our sales team to arrange alternate sizing where this is needed.