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Raised Intersections:
A raised intersection is essentially a speed table (see photograph to
the right) for the entire intersection. Construction involves providing
ramps on each vehicle approach, which elevates the entire intersection
to the level of the sidewalk. They can be built with a variety of materials,
including asphalt, concrete, stamped concrete, or pavers. The crosswalks
on each approach are also elevated as part of the treatment to enable
pedestrians to cross the road at the same level as the sidewalk, eliminating
the need for curb ramps. Use detectable warnings to mark the boundary
between the sidewalk and the street.
| Photo by Cara Seiderman
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| A raised intersection slows all vehicular movements through the intersection and improves pedestrian crossings in all directions. |
• Reduce vehicle speeds.
• Enhance the pedestrian environment at the crossings. |
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• Don’t use if on a sharp curve or if the street is on a steep grade.
• May not be appropriate if the street is a bus route or emergency route.
One device may be necessary and serve the primary need. Several raised devices
may be disruptive, so other measures should be considered.
• Speed tables and raised crosswalks and intersections can be an urban
design element through the use of special paving materials.
• Detectable warning strips at edges enable pedestrians with vision impairments
to detect the crossing.
• Care must be taken to manage drainage. |
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| Raised crosswalks are approximately $2,000 to $15,000, depending on drainage conditions and material used. The cost of a raised intersection is highly dependent on the size of the roads. They can cost from $25,000 to $75,000. |
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