A "speed hump" is a raised area in the roadway pavement surface that extends across the travel way to slow travel speed. A "speed hump" is a gradual rise in the pavement surface and is used on public streets, unlike a "speed bump" which is an abrupt change in pavement height used on a private driveway or parking lot.
Speed hump dimensions vary from agency to agency, but they are typically 12 feet long and 2 ½ to 3 inches high. They are usually placed across the roadway in a group of two to four humps per block, separated by 300 to 500 feet. The humps are typically requested by residents as a means to slow traffic in residential neighborhoods or decrease the amount of "cut-through" traffic in the block. Speed humps may have positive effects by:
- Reducing traffic speeds in the immediate vicinity of the speed humps,
- Decreasing traffic volume, and
- Reducing accidents in some areas.
At the same time, however, speed humps may also have detrimental effects by:
- Diverting traffic to other neighborhood streets thereby moving the problem rather than solving it
- Increasing noise levels due to vehicle brakes, tires and engines,
- Increasing vehicle emissions due to deceleration and acceleration
- Increasing the response time of emergency vehicles
- Conflicting with school and transit bus operation
- Presenting a potential hazard to bicyclists and motorcyclists.
The City of Burbank has a Speed Hump Control Plan, which allows speed humps in many areas, but prohibits their installation on specific streets. Speed humps cannot be used on the following streets:
- Major arterial streets
- Streets serving emergency services (police or fire stations)
- Streets with transit routes.
For more information regarding speed hump installation criteria click here, or contact the Traffic Division at (818) 238-3915.