Maximum Headroom Available at Arch Bridge Ahead Warning Sign – Diagram 531.1B | Permanent UK Traffic Sign

Maximum Headroom Available at Arch Bridge Ahead Warning Sign – Diagram 531.1B | Permanent UK Traffic Sign

The Maximum Headroom Available at Arch Bridge Ahead Warning Sign – Diagram 531.1B is a vital UK road sign used to notify drivers of height-restricted arch bridges. This version is specifically formatted with metric height measurements (metres) to comply with modern vehicle specifications and international standards, helping prevent bridge strikes and ensuring route safety for tall vehicles.

This triangular warning sign is fully compliant with TSRGD Diagram 531.1B, BS EN 12899-1, and Chapter 4 of the Traffic Signs Manual. The clear downward arrow and arch bridge icon, combined with a metric-only headroom figure, alert drivers of restricted clearance beneath curved structures such as railway bridges, tunnels, or old masonry arches.

Available in 450mm to 1500mm triangle sizes, the sign is manufactured in aluminium, composite material, or self-adhesive vinyl, with RA2 or R3B reflective sheeting for optimal day and night visibility. It can be mounted via channel rails, plate-only, or adhesive fixing, suiting both permanent and temporary use.

🔧 Technical Review

Diagram 531.1B differs from 531.1A by displaying only metric height information, aligning with current UK legal requirements and simplifying comprehension for international drivers. The graphic arch bridge symbol and precise height indication make it essential for preventing clearance-related accidents on UK roads.

✅ Why Choose Morelock for Your Diagram 531.1B Sign?

✔️ Fully compliant with TSRGD Diagram 531.1B, BS EN 12899-1, and Chapter 8
✔️ Displays maximum height in metric units (metres)
✔️ Manufactured in high-grade RA2 or R3B reflective sheeting
✔️ Built from aluminium, composite, or self-adhesive vinyl
✔️ Available in all six UK triangle sizes
✔️ Supplied direct from UK manufacturer with quick turnaround

📌 Ideal For:

• Arch bridges with metric clearance regulations
• Rail infrastructure or narrow underpasses
• Roadways used by HGVs, buses, caravans, or tall machinery
• International freight routes and European HGV networks
• Locations with metric-only signage compliance requirements

🌟 Summary (Why You Should Buy This Product)

• ✅ Official UK warning sign for arch bridges with metric clearance
• ✅ Conforms to TSRGD and BS EN 12899-1 signage standards
• ✅ Reflective, durable, and weather-resistant
• ✅ Offered in all triangle sizes with multiple mounting formats
• ✅ Rapid UK manufacturing and delivery from Morelock

📊 Product Specifications Table

🔗 Useful Road Sign Resources