Roundabouts are not new to Washington State. We have been building them in Washington since 1997. Not only are they increasing in number in Washington, they are also popping up all across the United States, and for good reason too. They are safe and efficient.
There are approximately 120 roundabouts in Washington, with many more planned:
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Existing State Highway Roundabouts:
I-5, Galaxy Drive/Quinault Drive/Freedom Lane , Lacey, Thurston County - single lane roundabout at the end of the northbound off-ramp.
SR 9, SR 539 near Mount Vernon, Skagit County - construction was completed in 2007.
I-90, West Lake Sammamish Pkwy, King County – this intersection was reconstructed for greater capacity and traffic flow. The roundabout was completed in fall 2005.
I-90, Eastbound Ramp to SR 202, North Bend, King County - WSDOT built a two-lane roundabout at the interchange of I-90 and SR 202 in North Bend to improve safety and traffic flow. Work was completed in Oct. 2007
SR 16, Burnham Drive Interchange ramps.
SR 202, Preston Fall City Road & Junction SR 203 , King County - WSDOT built a one-lane roundabout to improve safety at this intersection. Construction was completed July 2008.
SR 203, 124th Street/Novelty Hill, Duvall, King County – a multi-lane roundabout built in fall 2004. This was the first roundabout on a high-speed roadway.
SR 206, Bruce Road, Spokane, Spokane County – this roundabout near Spokane opened to traffic in December 2005.
SR 240, Tri-Cities Added Lanes, Richland, Benton County - roundabouts were constructed at the Richland Wye eastbound off-ramp and at Steptoe Street. The project was completed in June 2007.
US 395, Main Street and Hawthorne Street, Colville, Stevens County – a single-lane roundabout was opened to traffic in 2003. It also has two commercial access driveway approaches in it.
SR 501 (Pioneer Way), 45th Avenue in Ridgefield, Clark County. Completed in 2007.
SR 510, Marvin Road, Lacey, Thurston County – several roundabouts were constructed in 2003 at intersections throughout this project.
SR 522, Main Street westbound off-ramp -- Multi-lane roundabout built in 2001.
SR 903, Bullfrog Road, Cle Elum, Kittitas County – a single-lane roundabout that opened in spring 2005.
Roundabouts planned for construction:
Here are some of the roundabouts currently under way or being planned by state and local engineers for construction in the near future:
I-5, Woodland Interchange (Exit 22), Cowlitz County
I-82, Valley Mall Boulevard, Union Gap, Yakima County - design work is underway. Construction is planned to start in 2010.
SR 20 Sharpes Corner, Anacortes, Skagit County - design work continues. Construction has been delayed.
SR 282, Nat Washington Way Intersection, Ephrata, Grant County - design work is currently on hold, pending additional funding. If funded, construction could begin in 2009.
SR 539 (Guide Meridian) Bellingham, Whatcom County - Roundabouts are planned at key intersections on (SR 539) Guide Meridian Road to improve safety and relieve congestion north of Bellingham. Construction is scheduled for completion in 2009.
US 12, Pine Street Interchange Ramps, Walla Walla County - WSDOT will construct roundabouts at ramp intersections as part of this widening project. Work is scheduled for completion in 2009.
Roundabouts being considered for the future:
U.S. 2 - Corridor-wide improvements
I-5 Blaine Exits, Blaine, Whatcom County
I-5, SR 11 (Chuckanut) intersection, Burlington, Skagit County
I-5, Chambers Way (Exit 79), Chehalis, Lewis County
I-5 Mellen Street Interchange, Centralia, Lewis County
SR 14, Washougal, Clark County
SR 510, Yelm Loop, Thurston County
SR 531/SR 9 intersection, Snohomish County
Cities with multiple roundabouts, not on a state highway:
Bellingham
Covington
Federal Way
Gig Harbor
Kennewick
Lacey
Moses Lake
Olympia
Sequim
Spokane
University Place
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