The Danger Plate with Speed Hump, left (W417) is a high-visibility supplementary warning plate used to emphasise a hazard, in this case speed humps, with the hump symbol positioned to the left relative to the sign placement. It is used to improve early recognition where additional emphasis is needed.
Purpose and function
This plate reinforces the presence of speed humps and supports earlier speed reduction. It is commonly used where drivers require extra notice, such as higher approach speeds, limited sight lines, or repeated hump sets.
Typical applications
- Approaches to traffic calming zones and residential streets
- School and pedestrian priority areas where vehicles must slow down
- Industrial sites and depots with internal speed control points
- Locations with reduced visibility, gradients, or tight approach geometry
Commonly used with
- Speed Humps road sign (W332)
- Danger Plate left or right (W401 / W402)
- 20 km Speed Limit road sign (R201-20)
Materials and ordering notes
- Class 1 retro reflective road sign face
- Permanent road sign supplied on 1.2 mm Chromadek steel
- Please confirm stock availability when ordering road signs
- Poles, clamps, nuts and bolts are not included, email us if you require a quote
- Remember to order the correct size clamps for the poles you will be using if ordering unistruts on your road signs
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