The "end of dual carriageway" sign is a triangular warning sign with a red border and a white background, showing two black lines converging into one. It indicates that the road ahead will no longer have a central dividing barrier, meaning traffic from both directions will share a single carriageway. Drivers should reduce speed, stay alert for oncoming traffic, and be prepared for narrower lanes, more curves, and possibly increased hazards like head-on collisions or slower vehicles. The sign is placed to promote safety by warning drivers in advance about this change in road layout and traffic conditions.
Key Features of the Sign
- Shape: Upward-pointing triangle (standard for warning signs).
- Colors: Red border, white background, and black graphic.
- Symbol: Two lanes merging into one.
Purpose and Driver Actions
- Informs drivers that the dual carriageway is ending and the road becomes a single carriageway.
- Advises reducing speed to the appropriate limit (often up to 70 mph or lower in some areas).
- Encourages drivers to stay in their lane, watch for oncoming vehicles, and avoid overtaking in unsafe areas.
- Highlights the need for extra caution due to increased risk of head-on collisions and possible road layout changes like curves or junctions.
Placement
- Positioned before the central divider ends, often on highways, rural roads, or near towns.
- Sometimes accompanied by supplementary signs such as speed limits or distance ahead warnings.
This sign is important for ensuring drivers adjust their behavior to maintain safety as they transition from a divided to an undivided road.
