557.1 speed bumps ahead sign face for traffic-calmed roads
Diagram 557.1 is the official warning sign for speed bumps ahead, and it is recommended wherever road humps are installed. This sign face is manufactured in the UK to BS EN 12899-1:2007 and UK Highway Regulations, with Class 2 R2/RA2 high-intensity reflective sheeting on a 3mm aluminium composite panel, so it is suitable for both the public highway and private roads. It comes in 450mm, 600mm and 750mm sizes, either post mounted with rear channels or wall mounted and ready to drill.
Key features
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Diagram 557.1 - the official warning sign for speed bumps ahead.
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BS EN 12899-1:2007 and CE marked - the legal requirement for permanent signs on the public highway.
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Class 2 R2/RA2 reflectivity - a high-intensity surface that returns headlight beams to drivers in low light.
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3mm aluminium composite - red, white and black face with a grey rear, built for year-round outdoor use.
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Post or wall mounted - rear channels for anti-rotational post clips, or an undrilled face for wall fixing.
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Three sizes - 450mm, 600mm or 750mm to match the road speed and sight distance.
Where it is used
Speed bumps go where people and vehicles mix, so the 557.1 is a familiar sight across:
- University campuses and school approaches
- Housing estates and residential streets with traffic calming
- Industrial and retail parks with high pedestrian traffic
- Private roads and estates that have installed road humps
Sizes and mounting
Post mounted faces are supplied with rear channels that clamp to a 76mm post using anti-rotational clips, so the sign stays square once fixed. Wall mounted faces arrive undrilled - the aluminium composite takes a drill easily for screw fixing, or can be bonded with a no-nails adhesive. This listing is for the sign face only; posts and clips are sold separately.
Specification
| Specification |
Detail |
| Diagram reference |
557.1 |
| Sign sizes |
450mm, 600mm or 750mm |
| Face thickness |
3mm |
| Material |
Aluminium composite |
| Face colour |
Red / white / black |
| Rear colour |
Grey |
| Reflectivity |
Class 2 R2/RA2 |
| Standard |
BS EN 12899-1:2007, CE marked |
| Mounting |
Post mounted (rear channels) or wall mounted |
| Origin |
Made in the UK |
| Lead time |
7-10 working days |