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- DictionarySpeed bump/ˈspēd ˌbəmp/
noun
- 1. a ridge set in a road surface, typically at intervals, to control the speed of vehicles.
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noun
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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... Wikipedia