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Portland Bureau of Transportation

We keep Portland moving

Phone: 503-823-5185

Fax: 503-823-7576

1120 SW Fifth Ave, Suite 800, Portland, OR 97204

More Contact Info

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.

Diagonal Diverters

Diagonal diverters place a barrier diagonally across an intersection, disconnecting the legs of the intersection.

Raised Crosswalks

Raised cross walks are cross walks constructed 3-4 inches above the elevation of the street.

Pedestrian Improvements PHOTOS

Pedestrian Improvements PHOTOS

Traffic Volume Reduction PHOTOS

Traffic Volume Reduction PHOTOS

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.


A chicane changes a street's path from straight to serpentine


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.

Traffic Circles

Traffic circles are raised islands placed in an intersection

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.

Rubber Speed Bumps PHOTOS

Rubber Speed Bumps PHOTOS

Vehicle Exclusion Lanes

Exclusion lanes are lanes for a particular class of vehicle, excluding all others.

Entrance Treatments

Entrance treatments consist of physical and textural changes to streets and are located at key entry ways into a neighborhood

Devices 101

A power point introduction to traffic calming devices

Traffic Circle PHOTOS

Traffic Circle PHOTOS

School Improvements PHOTOS

School Improvements PHOTOS