Speed bump

Speed cushions in Canada. Gaps allow wide-track emergency vehicles to pass at higher speeds than they can through other traffic calming devices like speed humps.

For the cartoon series, see Speed Bump. For speed changes in cinematography, see speed ramping.

Speed bumps (or speed bumpers) are the common name for a family of traffic calming devices that use vertical deflection to slow motor-vehicle traffic in order to improve safety conditions. Variations include the speed hump (or speed ramp), speed cushion, and speed table.

单词	Sleeping policemen
释义	Sleeping policemen 英语百科 Speed bump For the cartoon series, see Speed Bump. For speed changes in cinematography, see speed ramping. Speed bumps (or speed bumpers) are the common name for a family of traffic calming devices that use vertical deflection to slow motor-vehicle traffic in order to improve safety conditions. Variations include the speed hump (or speed ramp), speed cushion, and speed table.
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Sleeping policemen

Speed bump