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Kent 4 star Council

Speed humps

Speed humps and chicanes are designed to keep vehicle speeds down along specific sections of road. They are traffic-calming measures that we can put in place if there is a strong road safety case. This may be, for instance, if vehicles are consistently speeding on a road next to a school.

Where can speed humps be used?

Road humps must only be used on roads:

  • that have a 30mph or lower speed limit
  • that are not A- or B- classed roads

Speed humps are designed to keep speeds low. They are not designed to reduce speeds. So there need to be other measures in place to slow vehicles down, before they reach the speed humps.

This could be a mini-roundabout, a narrow 'give way gateway', or similar measure.

Is there any reason not to use speed humps?

Yes. Road humps or cushions are very effective at reducing speed. But they can cause problems for emergency service vehicles, such as fire engines and ambulances. And they are noisy.

So using speed humps is not always the best traffic-calming measure to use.

Are there any other regulations that apply to speed humps?

Yes. There are regulations that apply to how speed humps can be used. They must comply with The Highways Act and The Highways (Road Humps regulations) 1999. Briefly, speedhumps must:

  • be no higher than 75mm
  • have appropriate signs to warn road users
  • be appropriately lit

Requesting a traffic-calming measure

You can ask us to consider putting a traffic-calming measure into a road if you believe that there is a strong road safety case or other good reason. To do this, contact Kent Highway Services.

Copyright Kent County Council 2008