30 MPH Speed Limit Sign – Diagram 670-B | Permanent UK Traffic Sign
The 30 MPH Speed Limit Sign – Diagram 670-B is a standard UK regulatory road sign used to indicate a mandatory maximum speed of 30 miles per hour. This sign features a clear black “30” on a white background enclosed in a red circle—widely recognised and used to reinforce national or local speed limits in urban, residential, and village settings.
Fully compliant with TSRGD Diagram 670-B, this sign is recommended in Chapter 3 of the Traffic Signs Manual. It plays a vital role in maintaining road safety, particularly in built-up areas, school routes, and pedestrian-heavy locations.
Produced using RA1 (urban) or RA2 (high-performance) reflective materials, the sign is available in multiple sizes and made from Zintec, GRP, composite board, 3mm or 5mm plastic, or self-adhesive vinyl. Installation options include plate-only, riveted-in-frame, quick-fit, or sticker mounting.
???? Technical Review
Diagram 670-B is used to enforce legal 30mph speed zones across UK highways and residential streets. It’s the most widely recognised speed restriction sign in the UK and is a critical part of traffic calming strategies implemented by local authorities and contractors.
✅ Why Choose Morelock for Your Diagram 670-B Sign?
✔️ Manufactured in the UK with fast delivery
✔️ Compliant with TSRGD and Chapter 3 standards
✔️ Multiple size and reflective grade options
✔️ Weatherproof materials for long-lasting performance
✔️ Ideal for councils, highways, housing developments
✔️ Compatible with all standard mounting systems
???? Ideal For:
• Urban and residential roads
• 30mph village or town entry points
• Speed reduction and enforcement schemes
• Housing estates and community zones
• Local authority infrastructure and street works
???? Summary (Why You Should Buy This Product)
• ✅ 30 MPH Speed Limit Sign – Diagram 670-B
• ✅ Compliant with UK traffic regulations
• ✅ Essential for urban and village speed enforcement
• ✅ Range of mounting and material options
• ✅ Fast UK manufacturing and dispatch
???? Product Specifications Table
| Feature | Details |
|---|---|
| Product Name | 30 MPH Speed Limit Sign |
| Diagram Number | 670-B |
| 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-B, Chapter 3 |
???? Additional Useful Links
| Section | Link & Description |
|---|---|
| ???? Shop Speed Limit Signs | Explore our full range of speed restriction signs |
| ???? Sizing Guide | Compare available sign sizes |
| ???? Installation Options | View our mounting solutions |
| ???? Get a Quote | Request a quote for Diagram 670-B |
| ???? Regulations & Guidance | Read the official Traffic Signs Manual |