Editing Speed bump (section)

{{Short description|Traffic calming device}}
{{more citations needed|date=December 2023}}
{{About||the speed changes in cinematography|Slow motion#In action films|other uses|Speed bump (disambiguation)}}
[[File:SpeedBump.JPG|thumb|right|Speed bump and warning signs]]
[[File:Road sign Humps for 1 mile Lilley Hertfordshire 2011-06-17.jpg|thumb|A road sign "Humps for 1 mile" in [[Hertfordshire]], England]]
'''Speed bumps''' (also called '''traffic thresholds''', '''speed breakers''' or '''sleeping policemen''') are a class of [[traffic calming]] devices that use vertical deflection to slow motor-vehicle traffic in order to improve safety conditions. Variations include the '''speed hump''', '''speed cushion''', and '''speed table'''.

The use of vertical deflection devices is widespread around the world, and they are most commonly used to enforce a  [[speed limit]] under {{cvt|40|km/h|mph}}.

Although speed bumps are effective in keeping vehicle speeds down, their use is sometimes controversial—as they can increase traffic noise, may damage vehicles if traversed at too great a speed (despite that being the point), and slow emergency vehicles. Poorly-designed speed bumps that stand too tall or with too-sharp an angle can be disruptive for drivers, and may be difficult to navigate for vehicles with low [[Ride height|ground clearance]], even at very low speeds. Many [[sports car]]s have this problem with such speed bumps. Speed bumps can also pose serious hazards to [[motorcyclist]]s and [[bicyclist]]s if they are not clearly visible, though in some cases a small cut across the bump allows those vehicles to traverse without impediment.