SR 203 Roundabout Construction Begins with Nighttime Single-Lane Closures in High Rock

State Route 203 will be reduced to a single lane with flaggers alternating traffic from 7 p.m. to 6 a.m., beginning Tuesday, May 28, through Friday morning, May 31, near the High Rock community.

People traveling between Monroe and Duvall should expect short delays from similar weeknight lane closures along SR 203 at the intersection with High Rock Road and 203rd Street Southeast through mid-June.

Contractors for the Washington State Department of Transportation will perform grading, drainage and electrical work to prepare for installing a unique, exclamation point-shaped compact roundabout that will improve mobility and safety in the area.

Four-day closure
Most of the work on this new roundabout will be done during a four-day closure of SR 203, tentatively scheduled for late June. During the closure, only local traffic will be allowed south of Tualco Road and north of Northeast Woodinville-Duvall Road. Freight traffic will detour using Northeast Woodinville-Duvall Road and SR 522, while other vehicles will use local roads.

Once completed later this summer, the new roundabout will calm traffic, slow vehicle speeds near the intersection and help drivers make easier turns and decisions. It will also feature two center islands that large trucks can drive over, making it easier for them to navigate the intersection.

Real-time travel information is available via the WSDOT mobile app, the WSDOT Travel Center Map or by signing up for WSDOT’s email updates.

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