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Speed Table:
A “speed table” is a term used to describe a very long and
broad speed hump, or a flat-topped speed hump, where sometimes a pedestrian
crossing is provided in the flat portion of the speed table (see Raised
Pedestrian Crossings). The speed table can either be parabolic, making
it more like a speed hump, or trapezoidal, which is used more frequently
in Europe. Speed tables can be used in combination with curb extensions
where parking exists.
• Reduce vehicle speeds. Raised measures tend to have the most predictable
speed reduction impacts.
• Enhance the pedestrian environment at pedestrian crossings. |
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• Do not use if on a sharp curve or if the street is on a steep grade.
• If the street is a bus route or primary emergency route, the design must
be coordinated with operators. Usually, some devices are acceptable if used
prudently — one device may be appropriate and may serve the primary need
(e.g., if there is a particular location along a street that is most in need
of slowing traffic and improving pedestrian conditions).
• The aesthetics of speed humps and speed tables can be improved through
the use of color and specialized paving materials.
• Noise may increase, particularly if trucks use the route regularly.
• May create drainage problems on some streets.
• Speed humps and tables should be properly designed to reduce the chance
of back problems or other physical discomfort experienced by vehicle occupants. |
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| The cost for each speed hump is approximately $1,000. Speed tables are $2,000 to $15,000, depending on drainage conditions and materials used. |
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