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Risk of Grounding at a Railway or Tramway Level Crossing or Hump Backed Bridge Warning Sign – Diagram 782. UK traffic sign used to warn long or low vehicles of undercarriage contact risk. Available in multiple sizes and reflective options.
Professional design, supply, and installation of all types of traffic signs across the UK.
Learn More 🚀The Risk of Grounding at a Railway or Tramway Level Crossing or Hump Backed Bridge Warning Sign – Diagram 782 is a key UK traffic warning sign designed to alert drivers—particularly those operating long-wheelbase or low-clearance vehicles—of potential undercarriage contact on uneven road features such as level crossings or steep bridge gradients. This proactive alert helps prevent vehicle hang-ups, damage, or accidents in areas where the road surface is sharply contoured.
This triangular warning sign is fully compliant with TSRGD Diagram 782, BS EN 12899-1, and the design guidance in Chapter 4 of the Traffic Signs Manual. Constructed for durability and visibility, it features RA2 or R3B reflective sheeting to enhance visibility during nighttime or in adverse weather conditions.
Manufactured using aluminium, composite materials, or self-adhesive vinyl, the sign is available in six UK-standard triangle sizes from 450mm to 1500mm, and supplied with multiple mounting options: channel rail fixings, plate-only formats, or adhesive backing.
Diagram 782 is characterised by a bold icon showing a vehicle grounding on a raised surface—indicating a risk for vehicles with low ground clearance or long overhangs. This sign is especially crucial at railway crossings, tramway intersections, and hump-backed bridges, where certain vehicles may become stuck or damaged without appropriate caution.
✔️ Compliant with TSRGD Diagram 782, BS EN 12899-1, and Chapter 8
✔️ High-reflectivity RA2 or R3B sheeting for enhanced safety
✔️ Built with robust aluminium, composite, or vinyl substrate
✔️ Six triangle sizes suitable for all UK road types
✔️ Choose from channel, plate-only, or adhesive mounting
✔️ Manufactured in the UK with fast delivery and full compliance
• Railway and tramway crossings with significant surface contours
• Hump-backed bridges and steep road transitions
• Construction access routes with temporary crossings
• Roads used by HGVs, trailers, low-floor buses or plant vehicles
• Highway safety upgrades requiring visual hazard indicators
• ✅ Official UK sign for grounding hazard warnings at crossings and bridges
• ✅ Ensures compliance for commercial and highway safety projects
• ✅ Reflective, weather-resistant and long-lasting design
• ✅ Offered in all triangle sizes and mount configurations
• ✅ Fast UK-based production and shipping
| Feature | Details |
|---|---|
| Product Name | Risk of Grounding Warning Sign |
| Diagram Number | 782 |
| 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 782, 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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