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