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SR 9 - SR 531 / 172nd St NE - Intersection Improvements

We constructed a roundabout at the SR 9/SR 531 intersection to improve safety and relieve congestion.

Our engineers believe that a roundabout is the best solution for improving safety and relieving congestion at the State Route 9/State Route 531 intersection in Arlington.

How You Benefit
Cross GlyphImproves Safety
The roundabout will help prevent serious collisions for the 17,000 drivers that use the intersection daily.
Car GlyphRelieves Congestion
A roundabout can help reduce congestion more efficiently than a signal as a significant amount of development occurs near this intersection.

Partnerships & Cooperation
We held two public open houses and worked with the city of Arlington before designing and building the roundabout. We put out regular updates about the project to the public and media, to help keep drivers moving during construction.                                 


Contact Us
Marqise Allen, WSDOT communications 
15700 Dayton Ave. NE 
Shoreline, WA 98233
Phone: 360-440-4699

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