The One-Way Roadway road sign (R4.2) is an R1 Series control sign used at intersections to show that a one-way carriageway applies in the indicated direction. It supports correct lane choice and prevents wrong-way movements.
Purpose and function
This sign guides drivers into the correct direction of travel when a one-way road connects to another road at an intersection.
Typical applications
- Intersections where a one-way road begins or joins another route
- Parking circulation routes and internal access roads
- Estate, campus, and industrial site traffic flow control
Related one-way variants
Commonly used with
Explainer guide
For the full context on control signs, see our R1 Series Control road signs explainer.
Materials and ordering notes
- Permanent road sign supplied on 1.2 mm Chromadek steel
- Class 1 retro reflective sign face
- Poles, clamps, nuts and bolts are not included, email us if you require a quote
- Please confirm stock availability when ordering road signs
Driver action
- Use the carriageway in the direction shown by the arrow
- Do not enter against the one-way flow
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