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Slow Moving Vehicles on Incline Warning Sign – Diagram 583. Warns of steep slopes with slow heavy traffic. Reflective and compliant in all standard UK sizes
Professional design, supply, and installation of all types of traffic signs across the UK.
Learn More 🚀The Slow Moving Vehicles Likely on Incline Ahead Warning Sign – Diagram 583 is a key UK traffic sign used to alert drivers of a steep incline or descent where slow-moving heavy vehicles, such as lorries or HGVs, may be encountered. Commonly placed before long uphill climbs or steep downhill sections, this sign helps drivers prepare for reduced-speed traffic, overtaking restrictions, and potential hazards.
Fully compliant with TSRGD Diagram 583, BS EN 12899-1, and Chapter 4 of the Traffic Signs Manual, this permanent warning sign is available in RA2 or R3B reflective classes and manufactured from durable aluminium, composite, or self-adhesive sticker substrates for maximum durability and visibility in all weather conditions.
Available in all UK-standard triangle sizes — 450mm, 600mm, 750mm, 900mm, 1200mm, and 1500mm — and compatible with channel fixing rails, plate-only fittings, or adhesive backing to meet every installation need.
Diagram 583 features a red-bordered triangle containing a black silhouette of a heavy goods vehicle descending or ascending a steep slope. The design immediately communicates the potential presence of slow-moving or struggling vehicles on inclines, providing crucial information for following drivers to adjust speed and remain alert.
✔️ Manufactured to TSRGD Diagram 583 and Chapter 8 specifications
✔️ RA2 or R3B reflective options for visibility day and night
✔️ Constructed from premium-grade aluminium, composite, or sticker material
✔️ Available in six UK-standard triangle sizes
✔️ Multiple mounting formats: channel rail, plate-only, or adhesive
✔️ Made in the UK and shipped with fast delivery options
• Steep hills and gradient zones
• Roads with frequent HGV or haulage traffic
• Motorway slip roads and climbing lanes
• Rural and mountainous roadways
• Quarry or logging routes with heavy slow vehicles
• ✅ Official UK sign for slow vehicles on inclines
• ✅ Fully compliant with TSRGD Diagram 583
• ✅ Built to last with reflective and durable materials
• ✅ Supplied in all UK triangle sign sizes
• ✅ Manufactured and shipped from the UK
| Feature | Details |
|---|---|
| Product Name | Slow Moving Vehicles Likely on Incline Ahead Warning Sign |
| Diagram Number | 583 |
| 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 583, 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 | 3.9 kg |
|---|---|
| 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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