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Uneven Road Ahead Sign – Diagram 556 warns of road surface irregularities. Temporary, reflective, weatherproof, and quick to deploy for roadworks.
Professional design, supply, and installation of all types of traffic signs across the UK.
Learn More 🚀The Uneven Road Ahead Sign – Diagram 556 is a UK-approved temporary traffic warning sign designed to alert drivers to surface irregularities such as dips, bumps, or undulating road conditions. Depicted by a wavy line inside a red-bordered triangle, it helps reduce vehicle speed and encourages caution in work zones, resurfacing areas, or weather-damaged stretches of road.
This sign is fully compliant with TSRGD Diagram 556 and Chapter 8 of the Traffic Signs Manual. It is commonly used on highways, rural roads, or urban maintenance zones where the road surface is temporarily disturbed or under repair.
Available in RA1 (urban/low speed) and RA2 (high speed) reflective grades, it’s manufactured using Zintec, GRP, composite boards, 3mm plastic (RA1), 5mm plastic (RA2), or vinyl sticker substrates. Fixings include plate-only, riveted-in-frame, quick-fit systems, or self-adhesive for sticker formats.
Diagram 556 is essential for preventing damage to vehicles and ensuring driver safety in areas with road height variances, rutting, or pothole risks. Chapter 8 specifies its use wherever surface irregularities exceed safe travel thresholds, especially on carriageways awaiting permanent resurfacing or where temporary infill is in place.
✔️ Fully compliant with TSRGD Diagram 556 and Chapter 8
✔️ Offered in RA1 or RA2 reflective grades
✔️ Lightweight, durable, and easy to transport
✔️ Made using Zintec, GRP, composite, or plastic
✔️ Supports all standard temporary sign mounting formats
✔️ Made in the UK – fast delivery and excellent value
• Road surface repairs and patching
• Carriageway degradation or rutting
• Utility reinstatement sites
• Temporary lane re-profiling zones
• Poor surface condition due to weather or works
• ✅ Temporary Uneven Road Warning – Diagram 556
• ✅ Clear symbol used for surface hazards
• ✅ RA1/RA2 reflective for high visibility
• ✅ Suitable for highways, lanes, and city streets
• ✅ Manufactured and delivered from the UK
| Feature | Details |
|---|---|
| Product Name | Uneven Road Ahead Sign |
| Diagram Number | 556 |
| Reflective Class (Facing) | RA1 (low speed), RA2 (high speed) |
| Mounting Options | Plate-only, Riveted in Frame, Quick Fit, Self-Adhesive (stickers only) |
| Material (Substrate) | Zintec, GRP, Composite, 3mm Plastic (RA1), 5mm Plastic (RA2), Stickers |
| Available Sizes (mm) | 600, 750, 900, 1200, 1500 |
| Compliance | TSRGD Diagram 556, Chapter 8 |
| Section | Link & Description |
|---|---|
| 🛒 Shop Temporary Signs | Browse our full range of Chapter 8 temporary signs |
| 📏 Sign Sizes | Sizes available: 600mm to 1500mm with RA1 & RA2 reflectivity |
| 🧰 Installation Options | Learn about Quick Fit, plate-only and adhesive mounts |
| 📞 Get a Quote | Request pricing for Diagram 556 or other signs |
| 📚 Regulations & Guidance | Traffic Signs Manual (GOV.UK) |
| Weight | 4.9 kg |
|---|---|
| Facing | RA1 |
| Substrate | Composite, Stickers, GRP, Plastic, Zintec |
| Fixing | Cone Mounted, Quick-Fit, Riveted in Frame, Plate Only, Self-Adhesive |
| Size (mm) | 600, 750, 900 |
| Facing Type | Warranty Duration |
|---|---|
| RA1 | 7 years |
| R2/RA2 | 10 years |
| R3B/R3C | 12 years |
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