Uneven Road Ahead Sign – Diagram 556 | Temporary UK Traffic Sign

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

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)