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30 MPH Speed Limit Sign – Diagram 670-B. UK standard regulatory road sign to enforce a 30mph speed limit in residential or urban areas. Fully compliant and high-visibility.
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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 ReviewDiagram 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 |
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