Traffic Calming Measures - Raised Intersection


Description:

  • flat raised areas covering entire intersections, with ramps on all approaches and often with brick or other textured materials on the flat section and ramps
  • sometimes called raised junctions, intersection humps, or plateaus

Applications:

  • work well with curb extensions and textured crosswalks
  • often part of an area wide traffic calming scheme involving both intersecting streets
  • in densely developed urban areas where loss of parking would be unacceptable
Raised Intersection
Raised Intersection Schematic Design/Installation Issues:
  • typically rise to sidewalk level
  • may require bollards to define edge of roadway
  • Canadian installations typically have gentle 1:40 slopes on ramps
  • storm drainage modifications are necessary

Potential Impacts:

  • reduction in through movement speeds at intersection
  • reduction in midblock speeds typically less than 10 percent
  • no effect on access
  • make entire intersections more pedestrian-friendly
  • no data available on volume or safety impacts

Emergency Response Issues:

  • slows emergency vehicles to approximately 15 miles per hour

Typical Cost:

  • reported costs range between $15,000 and $50,000 (1997 dollars)

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SPEED HUMP | SPEED TABLE | RAISED INTERSECTION | CLOSURE | NEIGHBORHOOD TRAFFIC CIRCLE | CHICANE | CHOKER | CENTER ISLAND NARROWING


Institute of Transportation Engineers
1627 Eye Street, NW, Suite 600 | Washington, DC 20006 USA
Telephone: +1 202-785-0060 | Fax: +1 202-785-0609
ite_staff@ite.org

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