Single track road' Supplementary Plate - Post Mount Diagram 519 R2/RA2
This permanent road sign supplementary plate is used to indicate areas of road that are “single track” and are therefore only suitable for one direction of traffic at a time. These should be used either end of roads that are narrow enough for only one vehicle.
Roads that have passing places where vehicles can pull in and let oncoming traffic pass, can use sign face 822 “PASSING PLACE” where appropriate.
This sign is available with different text heights (known as X heights). These can be changed to suit the speed of the road, it is important to note that changes in X height will impact the overall size of the sign face. For full guidance on where and how this sign should be used please consult the official TSRGD guidelines that can be found on our regulations page.