We constructed two single-lane roundabouts on State Route 92 in Lake Stevens. One is located at 99th Avenue Northeast and the second is at 113th Avenue Northeast.
About 21,000 vehicles use SR 92 near 99th Avenue Northeast each day and 16,500 vehicles each day travel through the 113th Avenue Northeast intersection.
These two intersections combined were the site of 42 collisions from 2006 to 2010. Studies have shown that roundabouts improve safety and reduce the risk of serious collisions.
Studies measuring traffic flow at intersections before and after conversion to a roundabout showed that the roundabout led to an 89 percent reduction in delays and a 56 percent reduction in vehicle stops.
| Economic Incentive
Roundabouts are less expensive to operate and maintain than traditional intersections. Roundabouts eliminate hardware, maintenance and electrical costs associated with traffic signals, which can cost between $5,000 and $10,000 per year to operate.
Partnerships & Cooperation
WSDOT worked closely with Snohomish County and the city of Lake Stevens when planning and building the roundabouts.
|Financial Data for PIN 109200B, 109201A
||Amount ($ in thousands)
|2003 Gas Tax (Nickel Funding)
|2005 Gas Tax (TPA)
|Pre-Existing Funds (PEF)
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