Roundabouts to replace intersections along SR-9

State set to install traffic circles at Frontier Village and Costco intersections; two other locations

WSDOT is set to complete four new roundabouts along SR-9 in the Lake Stevens area, including a new traffic circle set to replace the current Frontier Village intersection.  A new roundabout planned for the SR-9 at S. Lake Stevens Road intersection will most directly affect the new Costco development. According to WSDOT, nearly 20,000 vehicles pass throu…