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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

Diagonal Diverters

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

Curb Extensions

Curb extensions narrow the street by widening the sidewalk or the landscaped parking strip.

Pedestrian Improvements PHOTOS

Pedestrian Improvements PHOTOS

Traffic Circle PHOTOS

Traffic Circle PHOTOS

Raised Crosswalks

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

Traffic circles are raised islands placed in an intersection

Traffic Volume Reduction PHOTOS

Traffic Volume Reduction PHOTOS

Cul de Sacs

Cul-de-Sacs close one end of a street.

Rubber Speed Bumps PHOTOS

Rubber Speed Bumps PHOTOS

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.

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.

Devices 101

A power point introduction to traffic calming devices


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

Vehicle Exclusion Lanes

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

School Improvements PHOTOS

School Improvements PHOTOS

Entrance Treatments

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