Kris Olsen, WSDOT communications, 206-440-4704
Tim Nau, WSDOT assistant project engineer, 425-225-8726
MARYSVILLE – A major week-long traffic revision begins this week at the intersection of State Route 9 and 84th Street Northeast in Marysville and motorists should plan extra time to their drives as detours will add several miles to get around the work area.
This Thursday, Aug. 21, contractor crews working for the Washington State Department of Transportation will build a center island for the new roundabout at that location.
While both directions of SR 9 will remain open to traffic, left turns from SR 9 to 84th Street Northeast will be restricted from 9 p.m. Thursday, Aug. 21 until noon Friday, Aug. 29. In addition, drivers traveling east or west on 84th Street Northeast will only be allowed to turn right onto SR 9. They will not be allowed to continue on 84th Street Northeast across SR 9 or turn left onto SR 9.
These traffic revisions will provide contractor crews with the space they need to install and open the roundabout to traffic before Labor Day weekend and the start of the school year.
In some cases, detours will add more than 10 miles to a route and drivers are encouraged to adjust their plans to account for the extra travel time.
The detours include:
A map of the detour routes is also available on the project website.
WSDOT installs roundabouts to improve the safety of a particular corridor. The intersection of SR 9 and 84th Street Northeast was the site of 43 collisions between 2007 and 2012.
Roundabouts have been shown to reduce collisions by 75 percent at intersections where stop signs or signals were previously used for traffic control, according to a study by the Insurance Institute for Highway Safety. Roundabouts can also improve traffic flow by promoting a continuous flow of traffic.
The roundabout project is scheduled to be open to traffic this fall.