A method of vehicle speed reduction using a raised section of road which cannot be driven over at high speeds. Humps are also colloquially known as 'sleeping policemen'. 

Humps are unattractive to cycle over, and should not be employed on cycling infrastructure, unless there is a genuinely pressing need to slow down cycle traffic. They should always have a sinusoidal profile for reasons of cycling comfort, and to ensure a smoother ride.

Humps should also be used sparingly on roads themselves. Other measures - for instance, preventing or minimising through traffic, optical narrowing, or changing priorities - should always be employed first. Typically, Dutch residential streets have these kinds of speed-reduction measures, without any need for humps.