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Dual Carriageway Ends Ahead Warning Sign – Diagram 520. Warns drivers that a dual carriageway is ending and merging into a single two-way road. Available in multiple sizes and reflective options.
Professional design, supply, and installation of all types of traffic signs across the UK.
Learn More 🚀The Dual Carriageway Ends Ahead Warning Sign – Diagram 520 is an official UK road warning sign used to inform drivers that the divided dual carriageway is coming to an end and will merge into a single two-way road. This warning allows motorists to adjust speed, position, and overtaking expectations well in advance, helping to reduce the risk of head-on collisions and merge-related incidents.
Fully compliant with TSRGD Diagram 520, BS EN 12899-1, and Chapter 4 of the Traffic Signs Manual, this sign is constructed from durable aluminium or composite substrates, finished with RA2 or R3B reflective sheeting for excellent visibility in all light and weather conditions.
It is available in all standard UK triangular sizes: 450mm, 600mm, 750mm, 900mm, 1200mm, and 1500mm, with mounting systems including channel fixings, plate-only, and self-adhesive backing, suitable for permanent and temporary installations.
This warning sign features a black road graphic that visually converges from two lanes into one, within a red-bordered triangle. The design quickly communicates the end of a dual carriageway and helps drivers transition safely to single-carriageway conditions.
✔️ Officially compliant with TSRGD, Chapter 4, and BS EN 12899-1
✔️ RA2 or R3B reflective finish for high day/night visibility
✔️ Constructed from aluminium or composite material
✔️ Sizes available: 450mm, 600mm, 750mm, 900mm, 1200mm, 1500mm
✔️ Flexible mounting options: channel, plate-only, or self-adhesive
✔️ Supplied direct from the UK manufacturer with fast, free delivery
• End-of-dual-carriageway zones
• High-speed rural roads merging into two-way traffic
• Transition points before roundabouts or junctions
• Temporary lane merges due to roadworks
• Local authority highway safety installations
• ✅ Official UK warning sign for dual carriageway endings
• ✅ Fully compliant with TSRGD Diagram 520 and BS EN 12899-1
• ✅ Available in six sizes for any road setting
• ✅ Highly visible, weatherproof, and UV-resistant
• ✅ Free UK delivery and fast turnaround from manufacturer
| Feature | Details |
|---|---|
| Product Name | Dual Carriageway Ends Ahead Warning Sign |
| Diagram Number | 520 |
| Reflective Class (Facing) | RA2, R3B |
| Mounting Options | Channel, Plate-only, Self-Adhesive |
| Material (Substrate) | Aluminium, Composite, Stickers |
| Available Sizes (mm) | 450, 600, 750, 900, 1200, 1500 |
| Compliance | TSRGD Diagram 520, BS EN 12899-1, Chapter 8 |
🛒 Shop Permanent Traffic Signs:
✅ View all road signs – available in reflective aluminium and composite options
📌 Popular Triangle Sign Sizes:
📏 Explore 450mm, 600mm, 750mm, 900mm, 1200mm & 1500mm signs – fast UK delivery
🚧 Signage for Permanent Road Safety:
🛠 TSRGD-compliant signs for councils, highways, and contractors
📞 Get a Road Sign Quote:
💬 Request bulk pricing or custom sign specifications
📚 Official UK Traffic Guidelines:
📘 Safety at Street Works – Code of Practice (PDF)
📗 The Highway Code – Traffic Signs & Regulations
| Weight | N/A |
|---|---|
| Facing | RA1, RA2, R3B |
| Substrate | Aluminium, Composite, Stickers |
| Fixing | Channel, Plate Only, Self-Adhesive |
| Size (mm) | 300, 600, 750, 900 |
| Facing Type | Warranty Duration |
|---|---|
| RA1 | 7 years |
| R2/RA2 | 10 years |
| R3B/R3C | 12 years |
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