1120 SW Fifth Ave, Suite 800, Portland, OR 97204
Speed bumps are asphalt mounds constructed on streets and spaced 300 to 600 feet apart
Curb extensions narrow the street by widening the sidewalk or the landscaped parking strip.
Raised cross walks are cross walks constructed 3-4 inches above the elevation of the street.
Pedestrian Improvements PHOTOS
Cul-de-Sacs close one end of a street.
Traffic Volume Reduction PHOTOS
Diagonal diverters place a barrier diagonally across an intersection, disconnecting the legs of the intersection.
Semi-diverters are curb extensions or islands that block one lane of the street.
Choke Points are curb extensions placed mid block to narrow the roadway to 14' or the equivalent of one travel lane.
Pedestrian refuges or slow points are small islands in the middle of the street, typically designed with marked bike lanes on both sides.
Traffic circles are raised islands placed in an intersection
Exclusion lanes are lanes for a particular class of vehicle, excluding all others.
Traffic Circle PHOTOS
A chicane changes a street's path from straight to serpentine
A power point introduction to traffic calming devices
A median barrier is a concrete curb or island that is located on the centerline of a street and continues through the street's intersection with a given cross street.
Rubber Speed Bumps PHOTOS
Entrance treatments consist of physical and textural changes to streets and are located at key entry ways into a neighborhood
School Improvements PHOTOS