Phone: 503-823-5185
Fax: 503-823-7576
1120 SW Fifth Ave, Suite 800, Portland, OR 97204
Traffic Calming Devices & Photos
Speed Bumps
Speed bumps are asphalt mounds constructed on streets and spaced 300 to 600 feet apart
Curb Extensions
Curb extensions narrow the street by widening the sidewalk or the landscaped parking strip.
Pedestrian Improvements PHOTOS
Pedestrian Improvements PHOTOS
Chicanes
A chicane changes a street's path from straight to serpentine
Traffic Circle PHOTOS
Traffic Circle PHOTOS
Raised Crosswalks
Raised cross walks are cross walks constructed 3-4 inches above the elevation of the street.
Traffic Circles
Traffic circles are raised islands placed in an intersection
Rubber Speed Bumps PHOTOS
Rubber Speed Bumps PHOTOS
Traffic Volume Reduction PHOTOS
Traffic Volume Reduction PHOTOS
Devices 101
A power point introduction to traffic calming devices
Median Barriers
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 Point
Choke Points are curb extensions placed mid block to narrow the roadway to 14' or the equivalent of one travel lane.
Cul de Sacs
Cul-de-Sacs close one end of a street.
School Improvements PHOTOS
School Improvements PHOTOS
Vehicle Exclusion Lanes
Exclusion lanes are lanes for a particular class of vehicle, excluding all others.
Diagonal Diverters
Diagonal diverters place a barrier diagonally across an intersection, disconnecting the legs of the intersection.
Entrance Treatments
Entrance treatments consist of physical and textural changes to streets and are located at key entry ways into a neighborhood
Semi-Diverters
Semi-diverters are curb extensions or islands that block one lane of the street.
Pedestrian Refuges/Slow Points
Pedestrian refuges or slow points are small islands in the middle of the street, typically designed with marked bike lanes on both sides.