Speed Humps
Speed humps are rounded, raised areas placed across the roadway. They are generally 10 to 14 feet long (in the direction of travel), making them distinct from the shorter “speed bumps” found in many parking lots, and are 3 to 4 inches high. The profile of a speed hump can be circular, parabolic or sinusoidal. They are often tapered as they reach the curb on each end to allow unimpeded drainage.
Application:
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Locations where very low speeds are desired and reasonable, and noise and fumes are not a major concern.
Advantages:
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Relatively inexpensive.
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Relatively easy for bicycles to cross if designed appropriately.
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Very effective in slowing travel speeds.
Disadvantages:
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Cause a “rough ride” for all drivers, and can cause severe pain for people with certain skeletal disabilities.
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Force large vehicles, such as emergency vehicles and those with rigid suspensions, to travel at slower speeds.
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May increase noise and air pollution.
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Have questionable aesthetics.
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Spaced between 300 – 500 feet apart, so there may be several on a roadway.
Cost Estimate:
$5,000 each