PROJECT DESCRIPTION

Clackamas County will be making roadway improvements to SE 172nd Avenue from Highway 212 north to SE Sunnyside road. The project will accommodate existing and anticipated traffic volumes in the area. It will add travel lanes, bike lanes and sidewalks along the corridor and provide a new through connection from the south end of 172nd Avenue to Anderegg Parkway. Traffic signals are planned for the intersection at Highway 212 and Sunnyside Road. Three additional intersections are planned along the corridor. Two will be signalized and one will be a roundabout.

Road Alignment Map

For road alignment maps, click here.

UPDATES

The design team is in the process of preparing construction plans for the improvements. Right of way acquisition has begun and will continue through 2008. See the updated project schedule for more information.

Roundabout

A roundabout is proposed near the middle of the 172nd project. (Click here to view the proposed 172nd roundabout location.)

Modern-style roundabouts are commonly constructed at street intersections throughout the world. Use of modern-style roundabouts have been less common in the United States where traffic lights have been favored. In recent years, however, roundabouts have become popular in the US, including Oregon, since they can improve traffic flow and reduce chances for fatal traffic accidents.

For more information on the 172nd roundabout design and decision click on the links below:

• Roundabout Decision Letter
• Roundabout Public Comments
• Roundabout Decision Matrix

Green Street

A roadway that is edged with native landscaping that filters and holds stormwater is called a Green Street. Green Street designs are becoming popular throughout the United States and within the Portland area. A Green Street can provide environmental benefits as well as cost savings. A Green Street design is proposed for 172nd Avenue. (Click here to see the Green Street design for 172nd Avenue).

For more information on Green Streets click here.

Project Newsletters

• Project Newsletter (May 2007)
• Project Newsletter (January 2007)

Open Houses

Three open houses were held to gather input from residents and interested parties. These open houses were held on November 14, 2006, December 7, 2006 and January 18, 2007. The preferred road alignment was selected from input gathered at these open houses as well as comments received through the web page. The selected road alignment and design was chosen since it has the least amount of impacts to private property. No additional open houses are planned at this time, however comments can be submitted from this website (click here to submit your comments).