Skip to Main Content View Text-Only

Portland Bureau of Transportation

Phone: 503-823-5185

Fax: 503-823-7576

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

More Contact Info

Traffic Calming Devices & Photos

Safety: Vision Zero

Portland families deserve safe streets on which to walk, bike, operate mobility devices, access transit, and drive. PBOT aims to make our transportation system the safest possible and to move towards zero traffic-related fatalities and serious injuries in the next 10 years. This effort is known as Vision Zero.

Vision Zero acknowledges that the death or serious injury of even one person on Portland roadways is too many. When answering the question, “How many of our family members, friends, or neighbors can we accept being killed or maimed in traffic?” the only acceptable answer is zero.

The Portland Bureau of Transportation is committed to developing a Vision Zero safety strategy that outlines how street design, traffic enforcement, and education will realize our vision.

A critical component of our effort is reporting on our progress. On this page, you can learn more about our approach to Vision Zero (as laid out in our 2-Year Workplan), examine crash data and trends, learn about our current safety efforts, and view safety education resources.

Devices 101

A power point introduction to traffic calming devices

Raised Crosswalks

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

Curb Extensions

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

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.

Choke Point

Choke Points are curb extensions placed mid block to narrow the roadway to 14' or the equivalent of one travel lane.

Vehicle Exclusion Lanes

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

Cul de Sacs

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

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.


Semi-diverters are curb extensions or islands that block one lane of the street.

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


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

Traffic Circles

Traffic circles are raised islands placed in an intersection

Speed Bumps

Speed bumps are asphalt mounds constructed on streets and spaced 300 to 600 feet apart

School Improvements PHOTOS

School Improvements PHOTOS

Pedestrian Improvements PHOTOS

Pedestrian Improvements PHOTOS

Traffic Circle PHOTOS

Traffic Circle PHOTOS

Traffic Volume Reduction PHOTOS

Traffic Volume Reduction PHOTOS

Rubber Speed Bumps PHOTOS

Rubber Speed Bumps PHOTOS