Dual Carriageway Ends Ahead Warning Sign – Diagram 520 | Permanent UK Traffic Sign

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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.

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Dual Carriageway Ends Ahead Warning Sign – Diagram 520 | Permanent UK Traffic Sign

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.

🔧 Technical Review

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.

✅ Why Choose Morelock for Your Diagram 520 Sign?

✔️ 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

📌 Ideal For:

• 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

🌟 Summary (Why You Should Buy This Product)

• ✅ 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

📊 Product Specifications Table

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

🚧 Signage for Permanent Road Safety:

🛠 TSRGD-compliant signs for councils, highways, and contractors

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💬 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

The reflective materials used are weather resistant and designed for outdoor application. The range consists of three classes including RA1, R2/RA2, and R3B/R3C. The outdoor service life for each class of material is as follows: