Uneven Road Ahead Sign – Diagram 556 | Temporary UK Traffic Sign
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.
🔧 Technical Review
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.
✅ Why Choose Morelock for Your Diagram 556 Sign?
✔️ 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
📌 Ideal For:
• 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
🌟 Summary (Why You Should Buy This Product)
• ✅ 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
📊 Product Specifications Table
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 |
🔗 Additional Useful Links
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) |