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Maximum Headroom Available at Hazard Warning Sign – Diagram 530A. UK warning sign indicating safe clearance height under structures. Available in multiple sizes and reflective options.
Professional design, supply, and installation of all types of traffic signs across the UK.
Learn More 🚀The Maximum Headroom Available at Hazard Warning Sign – Diagram 530A is a crucial warning sign used to inform drivers of height restrictions ahead—particularly at bridges, tunnels, underpasses, or overhead structures. Designed to prevent collisions and protect over-height vehicles, this sign ensures safer navigation for HGVs, buses, caravans, and construction vehicles across UK roads.
Compliant with TSRGD Diagram 530A, this sign adheres to the highest standards outlined in BS EN 12899-1 and Chapter 4 of the Traffic Signs Manual. It clearly displays the maximum clearance height in both metric and imperial units, accompanied by a downward-pointing black arrow symbol to emphasise the direction of the restriction.
Manufactured using durable aluminium, composite materials, or self-adhesive vinyl, and available with high-visibility RA2 or R3B reflective sheeting. Supplied in six UK triangle sizes (450mm–1500mm) and with mounting options including channel rails, plate-only, or adhesive formats for permanent and temporary installation.
Diagram 530A features a bold arrow above a dual height measurement, helping tall vehicle operators gauge whether their load can safely pass through an upcoming restricted-height area. It plays a vital role in route planning and avoiding bridge strikes or tunnel incidents. Often used alongside physical barriers or advance warning plates.
✔️ Fully compliant with TSRGD Diagram 530A and Chapter 8
✔️ Dual-format height indicators in metric and imperial
✔️ High-visibility RA2 or R3B reflective sheeting
✔️ Built from aluminium, composite backing, or self-adhesive
✔️ Supplied in 450mm to 1500mm triangle sizes
✔️ Fast UK manufacture with flexible mounting options
• Railway and canal bridges with low clearance
• Tunnel entrances and vehicle height-sensitive routes
• Multi-storey car parks and depot gates
• Construction zones with temporary gantries
• Locations requiring strict vehicle clearance compliance
• ✅ Official UK height clearance warning sign
• ✅ Displays max height in metric & imperial formats
• ✅ Complies with all UK signage standards
• ✅ Reflective, weatherproof and highly durable
• ✅ Available in multiple sizes and mount types from UK stock
| Feature | Details |
|---|---|
| Product Name | Maximum Headroom Available at Hazard Warning Sign |
| Diagram Number | 530A |
| 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 530A, BS EN 12899-1, Chapter 8 |
| 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 | N/A |
|---|---|
| Facing | RA1, RA2, R3B |
| Substrate | Aluminium, Composite, Stickers |
| Fixing | Channel, Plate Only, Self-Adhesive |
| Size (mm) | 300, 600, 750, 900 |
| Facing Type | Warranty Duration |
|---|---|
| RA1 | 7 years |
| R2/RA2 | 10 years |
| R3B/R3C | 12 years |
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