Road Narrows on Right Ahead Warning Sign – Diagram 517B | Permanent UK Traffic Sign

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Road Narrows on Right Ahead Warning Sign – Diagram 517B. Warns drivers of a narrowing carriageway on the right side. Available in multiple sizes and reflective options.

If the product offers variations, Choose an option from each row:

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Road Narrows on Right Ahead Warning Sign – Diagram 517B | Permanent UK Traffic Sign

The Road Narrows on Right Ahead Warning Sign – Diagram 517B is a permanent UK traffic warning sign designed to alert drivers that the carriageway narrows from the right-hand side. Ideal for roads with narrowing shoulders, construction zones, or lane realignment, this sign helps improve safety by encouraging caution, lane discipline, and reduced speed.

Fully compliant with TSRGD Diagram 517B, BS EN 12899-1, and Chapter 4 of the Traffic Signs Manual, this warning sign is made using aluminium or composite substrates, and features high-performance RA2 or R3B reflective sheeting for superior visibility day and night.

It is available in the full range of UK standard triangular sizes: 450mm, 600mm, 750mm, 900mm, 1200mm, and 1500mm. Installation options include channel fixings, plate-only, or self-adhesive backing, making it suitable for permanent and temporary traffic management.

🔧 Technical Review

This red-bordered triangular sign features two black vertical lines, with the right line curving inward to indicate narrowing. The clean, intuitive layout helps motorists quickly recognise the hazard ahead and adjust their driving accordingly.

✅ Why Choose Morelock for Your Diagram 517B Sign?

✔️ Official TSRGD-compliant traffic sign,
✔️ High-visibility RA2 or R3B reflective finish,
✔️ Aluminium, composite, or sticker format available,
✔️ Six sizes: 450mm, 600mm, 750mm, 900mm, 1200mm, 1500mm,
✔️ Installation-ready with multiple fixing options,
✔️ Fast UK-wide delivery direct from manufacturer,

📌 Ideal For:

• Roads narrowing from the right side,
• Lane closures on rural or city roads,
• Highway and street maintenance zones,
• Temporary or permanent traffic changes,
• Local authority and contractor use,

🌟 Summary (Why You Should Buy This Product)

• ✅ Official UK road sign for right-side narrowing,
• ✅ Diagram 517B compliant and fully reflective,
• ✅ Six size options for any setting,
• ✅ Weather-resistant, long-lasting materials,
• ✅ Free UK delivery from a trusted manufacturer

📊 Product Specifications Table

Feature	Details
Product Name	Road Narrows on Right Ahead Warning Sign
Diagram Number	517B
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 517B, BS EN 12899-1, Chapter 8

🔗 Useful Road Sign Resources

Section	Link & Description
🛒 Shop Permanent Signs	Explore all Chapter 8 compliant road signs – reflective and compliant
📏 Standard Triangle Sign Sizes	Choose from 450mm, 600mm, 750mm, 900mm, 1200mm & 1500mm – fast delivery
🚧 Permanent Installation Options	Mounting posts, fixings, and installation services across the UK
📞 Get a Road Sign Quote	Request pricing for bulk orders or custom specifications
📚 Government Guidance	Safety at Street Works – Official Code of Practice (PDF) The Highway Code – UK traffic signage rules and standards

Weight	3.9 kg
Facing	RA1, RA2, R3B
Substrate	Aluminium, Composite, Stickers
Fixing	Channel, Plate Only, Self-Adhesive
Size (mm)	300, 600, 750, 900

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: