Road Hump or Series of Road Humps Ahead Warning Sign – Diagram 557.1 | Permanent UK Traffic Sign

£8.77 – £86.41
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Road Hump Warning Sign – Diagram 557.1. Warns drivers of speed humps or traffic calming bumps ahead. Available in all standard UK sizes and reflective grades.

If the product offers variations, Choose an option from each row:

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Road Hump or Series of Road Humps Ahead Warning Sign – Diagram 557.1 | Permanent UK Traffic Sign

The Road Hump or Series of Road Humps Ahead Warning Sign – Diagram 557.1 is an essential UK road safety sign designed to warn drivers about upcoming raised speed control measures such as speed humps or calming cushions. These features are typically found in residential, school, or urban areas to reduce vehicle speed and improve pedestrian safety.

This permanent road sign fully complies with TSRGD Diagram 557.1, BS EN 12899-1, and Chapter 4 of the Traffic Signs Manual. It is built from highly durable aluminium, composite, or self-adhesive materials, and is available with RA2 or R3B reflective finishes to provide maximum visibility both day and night.

Supplied in all six standard UK triangle sizes — 450mm, 600mm, 750mm, 900mm, 1200mm, and 1500mm — and available with channel fixings, plate-only, or adhesive backing, this sign is ideal for use in both permanent traffic-calming zones and temporary diversion setups.

🔧 Technical Review

Diagram 557.1 features a clear graphic of a single raised road hump, enclosed in a bold red triangle. Its purpose is to encourage drivers to reduce speed ahead of vertical deflections designed to control traffic flow and protect pedestrians.

✅ Why Choose Morelock for Your Diagram 557.1 Sign?

✔️ Fully compliant with TSRGD Diagram 557.1, BS EN 12899-1, and Chapter 8
✔️ RA2 or R3B high-reflectivity options
✔️ Six triangle sizes: 450mm–1500mm
✔️ Material options: aluminium, composite, or sticker
✔️ Installation options: channel, plate-only, or self-adhesive
✔️ Fast, reliable UK-wide shipping

📌 Ideal For:

• Residential areas with speed humps
• School zones and playground perimeters
• Urban streets and 20mph zones
• Car parks with traffic-calming installations
• Temporary routes with raised ramp warnings

🌟 Summary (Why You Should Buy This Product)

• ✅ Official UK sign for warning of speed humps or cushions
• ✅ Reflective and compliant with Diagram 557.1
• ✅ Suitable for urban, rural, or temporary traffic calming zones
• ✅ All standard sizes available
• ✅ UK-manufactured and ready to ship

📊 Product Specifications Table

Feature	Details
Product Name	Road Hump or Series of Road Humps Ahead Warning Sign
Diagram Number	557.1
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 557.1, BS EN 12899-1, Chapter 8

🔗 Useful Road Sign Resources

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

The reflective materials used are weather resistant and designed for outdoor application. The range consists of three classes including RA1, R2/RA2, and R3B/R3C. The outdoor service life for each class of material is as follows: