Speed humps are paved (usually asphalt) and approximately 76 to 102 mm (about 3 to 4 in) high at their center, and extend the full width of the street with height tapering near the drain gutter to allow unimpeded bicycle travel. Speed humps should not be confused with the speed "bump" that is often found in mall parking lots. There are several designs for speed humps. The traditional 3.7-m (12-ft) hump has a design speed of 24 to 32 km/h (15 to 20 mi/h), a 4.3-m (14-ft) hump a few miles per hour higher, and a 6.7-m (22-ft) table has a design speed of 40 to 48 km/h (25 to 30 mi/h). The longer humps are much gentler for larger vehicles.
Rubber based speed hump
Easy to setup and remove
Standard residential speed hump
1. Relatively cheap to install.
2. Effective at reducing speeds.
3. Effective at reducing volumes.
4. Temporary versions exist.
1. Not suitable for sharp curves or steep grades.
2. May impact buses.
3. May create delays for emergency response vehicles.
4. May increase traffic noise.
5. May create drainage problems.
6. May divert traffic to adjacent roads.