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50 MPH Speed Limit Sign – Diagram 670-D. Official UK speed control sign for 50mph zones. Ideal for highways, bypasses, or rural transitions. Compliant with TSRGD.
Professional design, supply, and installation of all types of traffic signs across the UK.
Learn More 🚀The 50 MPH Speed Limit Sign – Diagram 670-D is a regulatory UK traffic sign used to enforce a maximum speed limit of 50 miles per hour. Clearly marked with a bold black “50” in a red-bordered circle, this sign is ideal for single or dual carriageways, bypasses, and transition areas between higher and lower speed limits.
It complies with TSRGD Diagram 670-D and is recommended in Chapter 3 of the Traffic Signs Manual. Used by highways authorities, developers, and contractors, this permanent sign is essential for improving road safety and enforcing speed compliance in semi-urban, rural, or light industrial zones.
Available in RA1 and RA2 reflective face options, this sign can be produced in various sizes using Zintec steel, GRP, composite panels, 3mm or 5mm plastic, or self-adhesive vinyl. Mounting types include plate-only, riveted in frame, quick-fit, or adhesive sticker.
Diagram 670-D is widely used to reduce vehicle speeds on strategic road links, perimeter roads, approach routes to towns, or near junctions. It’s a crucial part of the UK’s speed management strategy and ensures visibility and authority in regulated areas.
✔️ Fully compliant with TSRGD and Chapter 3
✔️ Clear, bold speed limit indication
✔️ Available in RA1 & RA2 reflective grades
✔️ Built to last using premium weather-resistant materials
✔️ Full range of sizes and mounting options
✔️ Manufactured in the UK with quick dispatch
• Dual carriageways and fast rural routes
• Urban-rural transition roads
• Strategic bypass or slip roads
• Highway maintenance and safety schemes
• Local authority and contractor installations
• ✅ 50 MPH Speed Limit Sign – Diagram 670-D
• ✅ Standard UK traffic regulation sign
• ✅ Available in 7 sizes with RA1 or RA2 faces
• ✅ Fully compliant with UK highway standards
• ✅ Durable and clearly visible in all conditions
| Feature | Details |
|---|---|
| Product Name | 50 MPH Speed Limit Sign |
| Diagram Number | 670-D |
| Reflective Class (Facing) | RA1 (urban), RA2 (high performance) |
| Mounting Options | Plate-only, Riveted Frame, Quick Fit, Self-Adhesive |
| Material (Substrate) | Zintec, GRP, Composite, 3mm Plastic, 5mm Plastic, Stickers |
| Available Sizes (mm) | 300, 450, 600, 750, 900, 1200, 1500 |
| Compliance | TSRGD Diagram 670-D, Chapter 3 |
| Section | Link & Description |
|---|---|
| 🛒 Shop Speed Limit Signs | Browse our range of speed limit signs |
| 📏 Size Information | Explore available sign sizes |
| 🧰 Mounting Options | See mounting and fixing methods |
| 📞 Get a Quote | Request a quote for 670-D or other signs |
| 📚 Traffic Sign Guidance | Official Traffic Signs Manual – GOV.UK |
| Weight | 4.9 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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