| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| Ferndale,
                WA Whatcom Co. United States | Vista Dr. / Malloy Ave. / Ferndale Terr. (48.85251, -122.59620) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.3640 | Other (At-Grade) Single-Lane | 2007 | Opened September 2007. ICD estimated from Google Maps linework. | 
| Covington,
                WA King Co. United States | SE 256th St. / 164th Ave. SE (47.37256, -122.12290) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 50.1477 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2007 | Open September 2007. ICD estimated from Google Maps linework. | 
| Covington,
                WA King Co. United States | 172nd Ave. SE / SE 270th Pl. (47.35939, -122.11240) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 34.7885 | Other (At-Grade) Single-Lane | 2001 | ICD estimated from Google Maps linework. | 
| Colville,
                WA Stevens Co. United States | SR 395 / Railroad Ave. (48.54959, -117.91250) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 37.9494 | Other (At-Grade) Single-Lane | 2007 | Opened October 2007. ICD estimated from Google Maps linework. | 
| Chehalis,
                WA Lewis Co. United States | NW Louisiana Ave. / Wal-Mart-Home Depot Access (46.67881, -122.97600) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.3319 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2006 | Opened September 2006. Fourth leg opened late 2015/early 2016. ICD estimated from Google Maps linework. | 
| Bellingham,
                WA Whatcom Co. United States | Mitchell Way / Bellingham Airport Access Rd. (48.79757, -122.53080) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 31.4692 | Other (At-Grade) Single-Lane | 2003 | ICD estimated from Google Maps linework. | 
| Tacoma,
                WA Thurston Co. United States | N. 37th St. / Stevens St. / Mason Ave. (47.28197, -122.49590) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 21.8760 | Other (At-Grade) Single-Lane | 2007 | One leg skewed at ~60 degrees. Opened April 2007. Previously controlled by two-way stop ICD estimated from Google Maps linework. | 
| Bellevue,
                WA King Co. United States | Landerholm Rd. / South Perimeter Cir. (47.58438, -122.14600) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.8343 | Other (At-Grade) Single-Lane | 2003 | Opened July 2003. Entrance to Bellevue Community College. ICD estimated from Google Maps linework. | 
| Federal Way,
                WA King Co. United States | S 317th St. / 28th Ave. S / I-5 HOV Access Ramps (47.31781, -122.29760) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 40.4836 | Freeway Ramps (Grade-Separated) Single-Lane | 2006 | Opened February 2006. ICD estimated from Google Maps linework. | 
| Federal Way,
                WA King Co. United States | 16th Ave. S / Todd Beamer High School entrance (47.27650, -122.31360) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 29.9813 | Other (At-Grade) Single-Lane | 2003 | Opened September 2003. Access to high school. ICD estimated from Google Maps linework. | 
| Federal Way,
                WA King Co. United States | S 334th St. / 38th Ave. S (47.30278, -122.28610) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 28.3466 | Other (At-Grade) Single-Lane | 2006 | Opened January 2006. ICD estimated from Google Maps linework. | 
| Gig Harbor,
                WA Pierce Co. United States | Borgen Blvd. / Peacock Hill Ave. NW (47.35992, -122.58930) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 26.6979 | Other (At-Grade) Single-Lane | 2006 | Opened January 2006. ICD estimated from Google Maps linework. | 
| Gig Harbor,
                WA Pierce Co. United States | Borgen Blvd. / Harbor Hill Dr. (47.35993, -122.60160) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.8333 | Other (At-Grade) Single-Lane | 2007 | Opened March 2007. ICD estimated from Google Maps linework. | 
| Gig Harbor,
                WA Pierce Co. United States | Point Fosdick Dr. NW / NW 36th St. (47.29077, -122.57790) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 28.3530 | Other (At-Grade) Single-Lane | 2005 | Opened September 2005. ICD estimated from Google Maps linework. | 
| Ridgefield,
                WA Clark Co. United States | SR 501 (Pioneer St.) / 45th Ave. (45.81568, -122.70290) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.4529 | Other (At-Grade) Single-Lane | 2007 | Opened August 16, 2007. http://www.wsdot.wa.gov/News/2007/08/06_SR501Roundabouts.htm. Rural. ICD estimated from Google Maps linework. | 
| Olympia,
                WA Thurston Co. United States | Olympic Way NW / 4th Ave. W / 5th Ave. W (47.04422, -122.91200) | Roundabout Existing | All-Way Yield Active Pedestrian Warning (flashing yellow) | 4 Approaches 0 Driveways 38.2512 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2004 | Opened March 2004. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Olympia,
                WA Thurston Co. United States | Olympic Way NW / Harrison Ave. NW / W Bay Dr. NW (47.04582, -122.91330) | Roundabout Existing | All-Way Yield Active Pedestrian Warning (flashing yellow) | 3 Approaches 0 Driveways 34.9947 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2004 | Opened March 2004. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Colville,
                WA Stevens Co. United States | US 395 (Main St.) / E Hawthorne Ave. / Railroad Ave. / S Washington St. (48.53631, -117.90580) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 68.5800 | Other (At-Grade) Single-Lane | 2003 | Opened March 2003. Hotdog/racetrack shape. ICD = 225 ft x 120 ft. | 
| Seattle,
                WA King Co. United States | E. Ward St. / 28th Ave. E. (47.62741, -122.29640) | Traffic Calming Circle Existing | All-Way Yield None | 4 Approaches 0 Driveways 21.7327 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Bellingham,
                WA Whatcom Co. United States | Cordata Pkwy. / Westerly Dr. (48.79198, -122.49140) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.4068 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2005 | http://cob.org/documents/pw/curconst/ES-0237.pdf Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Yelm,
                WA Thurston Co. United States | SR 510 / Mud Run Rd. SE (46.96465, -122.63230) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.8630 | Other (At-Grade) Single-Lane | 2010 | October 2010. ICD estimated from Google Maps linework. | 
| Seattle,
                WA King Co. United States | 31st Ave. E / E. Pike St. (47.61410, -122.29250) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Unknown | ||
| Seattle,
                WA King Co. United States | 32nd Ave. E / E. Pike St. (47.61408, -122.29140) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Unknown | ||
| Seattle,
                WA King Co. United States | 33rd Ave. E / E. Pike St. (47.61405, -122.29030) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 73.2661 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | 32nd Ave. E / E. Pine St. (47.61526, -122.29130) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 63.6032 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | 32nd Ave. E / E. Olive St. (47.61643, -122.29130) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 22.5424 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | 32nd Ave. E / E. Howell St. (47.61763, -122.29130) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 11.2709 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | 33rd Ave. E / E. Howell St. (47.61764, -122.29020) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 79.7016 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | Woodlawn Ave. N / Wallingfor Ave. N (47.69778, -122.33650) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 9.6460 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | Densmore Ave. N / N. 36th St. (47.65051, -122.33750) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 13.6775 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | 34th Ave. SW / SW Elmgrove St. (47.53009, -122.37530) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Unknown | ||
| Spokane,
                WA Spokane Co. United States | SR 206 (Mt. Spokane Park Dr.) / Bruce Rd. (47.78761, -117.30400) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.3076 | Other (At-Grade) Single-Lane | 2005 | http://www.wsdot.wa.gov/Projects/SR206/BruceRoadRoundabout/. Opened December 2005. Previously controlled by 2-way stop control ICD estimated from Google Maps linework. | 
| Spokane,
                WA Spokane Co. United States | Wellesley Ave. / A St. (47.70076, -117.45400) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.7401 | Other (At-Grade) Single-Lane | 2005 | Opened October 2005. ICD estimated from Google Maps linework. | 
| Seattle,
                WA King Co. United States | 16th Ave. E. / E. Spring St. (47.61154, -122.31150) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 8.8568 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | 15th Ave. E. / E. Spring St. (47.61155, -122.31280) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 44.2838 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | 16th Ave. E. / E. Marion St. (47.61037, -122.31150) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 9.6621 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | 17th Ave. E. / E. Marion St. (47.61036, -122.31020) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 6.4414 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | Ashworth Ave. N / N 137th St. (47.72868, -122.33970) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 14.4604 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | Wallingford Ave. N / N 137th St. (47.72868, -122.33690) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 12.8537 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Tumwater,
                WA Thurston Co. United States | Tumwater Blvd. / New Market St. (46.97971, -122.91320) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 49.7052 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2006 | Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Seattle,
                WA King Co. United States | Bagley Ave. N / N 42nd St. (47.65796, -122.33260) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways | Other (At-Grade) Unknown | ||
| Seattle,
                WA King Co. United States | Corliss Ave. N / N 39th St. (47.65429, -122.33140) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 12.8720 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | Meridian Ave. N / N 37th St. (47.65196, -122.33386) | Traffic Calming Circle Existing | Uncontrolled Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Seattle,
                WA King Co. United States | Corliss Ave. N / N 37th St. (47.65195, -122.33150) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 16.8953 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | Bagley Ave. N / N 39th St. (47.65431, -122.33260) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 12.8720 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Cle Elum,
                WA Kittitas Co. United States | SR 903 / Bullfrog Rd (47.20810, -120.98210) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 37.3222 | Other (At-Grade) Single-Lane | 2005 | ICD estimated from Google Maps linework. | 
| Kennewick,
                WA Benton Co. United States | 4th Ave. / Kellogg St. (46.20635, -119.20120) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.2355 | Other (At-Grade) Single-Lane | 2009 | April 2009. Previously controlled by two-way stop Functional Class: Collector ICD estimated from Google Maps linework. | 
| Kennewick,
                WA Benton Co. United States | Grandridge Blvd. / Okanogan Pl. (46.22327, -119.21380) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.3148 | Other (At-Grade) Single-Lane | 2003 | Completed November 2003. Functional Class: Collector ICD estimated from Google Maps linework. | 
| Spokane,
                WA Spokane Co. United States | Crestline Rd. / Lincoln St. (47.72944, -117.37920) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.5271 | Other (At-Grade) Single-Lane | 2006 | Opened September 2006. ICD estimated from Google Maps linework. | 
| Seattle,
                WA King Co. United States | 8th Ave. NE / NE 115th St. (47.71221, -122.32060) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways | Other (At-Grade) Unknown | ||
| Seattle,
                WA King Co. United States | 8th Ave. NE / NE 117th St. (47.71402, -122.32070) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways | Other (At-Grade) Unknown | ||
| Seattle,
                WA King Co. United States | 8th Ave. NE / NE 120th St. (47.71584, -122.32070) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways | Other (At-Grade) Unknown | ||
| Seattle,
                WA King Co. United States | 8th Ave. NE / NE 123rd St. (47.71767, -122.32080) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 29.7304 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | Ashworth Ave. N / N 38th St. (47.65269, -122.34020) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 160.1009 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | Burke Ave. N / N 35th St. (47.64919, -122.33510) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 9.6550 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Redmond,
                WA King Co. United States | Trilogy Pkwy NE / NE Greens Crossing Rd. (47.70752, -122.02660) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.7178 | Other (At-Grade) Single-Lane | 2004 | Adjacent to golf course and semi-retired community. Completed June 2004. ICD estimated from Google Maps linework. | 
| Bellingham,
                WA Whatcom Co. United States | Cordata Pkwy. / Kellogg Rd. (48.79511, -122.49170) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.3384 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2003 | Primary access to Whatcom Community College. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Federal Way,
                WA King Co. United States | Weyerhaeuser Way S / S 336th St. (47.30262, -122.29650) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 60.9600 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2004 | Opened July 2004. Painted spirals in circulatory roadway to guide all three left turns to outer circulating lane. | 
| Seattle,
                WA King Co. United States | Interlake Ave. N / N 39th St. (47.65411, -122.34130) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 14.4811 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Kennewick,
                WA Benton Co. United States | Grandridge Blvd. / Center Pkwy. (46.22032, -119.23220) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.5746 | Other (At-Grade) Single-Lane | 2006 | Completed August 3, 2006. Functional Class: Collector ICD estimated from Google Maps linework. | 
| Kennewick,
                WA Benton Co. United States | Gage Blvd. / Center Pkwy. (46.22710, -119.23120) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 44.6169 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Kennewick,
                WA Benton Co. United States | 27th Ave. / Vancouver St. (46.18394, -119.14850) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 26.4604 | Other (At-Grade) Single-Lane | 2004 | Completed November 15, 2004. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Kennewick,
                WA Benton Co. United States | 18th Ave. / Irving St. (46.19221, -119.19620) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.1649 | Other (At-Grade) Single-Lane | 2006 | New roads/intersection in subdivision - completed February 2006. Functional Class: Local ICD estimated from Google Maps linework. | 
| Kennewick,
                WA Benton Co. United States | 19th Ave. / Union St. (46.19220, -119.18040) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.2832 | Other (At-Grade) Single-Lane | 2003 | 1/3 mile from school, primary bus and traffic route for the school, on school walking route, has adult crossing guards. Previously controlled by two-way stop Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Kennewick,
                WA Benton Co. United States | 4th Ave. / Union St. (46.20640, -119.18010) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 26.4496 | Other (At-Grade) Single-Lane | 2003 | Completed October 2003. Functional Class: Collector ICD estimated from Google Maps linework. | 
| Kennewick,
                WA Benton Co. United States | Kennewick Ave. / Union St. (46.20983, -119.18000) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 23.1420 | Other (At-Grade) Single-Lane | 2003 | Completed October 2003. Functional Class: Collector ICD estimated from Google Maps linework. | 
| Kennewick,
                WA Benton Co. United States | Young St. / Quinault Ave. (46.22004, -119.21950) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 39.6646 | Other (At-Grade) Single-Lane | 2003 | Completed November 2003. Functional Class: Collector ICD estimated from Google Maps linework. | 
| Silverdale,
                WA Kitsap Co. United States | NW Anderson Hill Rd. / Frontier Pl. NW (47.65368, -122.70350) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 21.7218 | Other (At-Grade) Single-Lane | 2003 | Opened September 2003. ICD estimated from Google Maps linework. | 
| Kennewick,
                WA Benton Co. United States | Creekstone Dr. / Irving St. (46.18894, -119.19640) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.0725 | Other (At-Grade) Single-Lane | 2005 | New roadway (Creekstone) connecting into existing subdivision stub-street (Irving) on south side and new subdivision on north side Functional Class: Collector ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | I-5 NB Off-Ramp / Galaxy Dr. / Quinault Dr. (47.06127, -122.76890) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.5438 | Other (At-Grade) Single-Lane | 2000 | Completed November 1, 2000. ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | Meridian Rd. / Orion Dr. (47.06890, -122.74140) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 34.1661 | Other (At-Grade) Single-Lane | 2002 | Opened October 2002. Functional Class: Collector ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | Marvin Rd. / Hawks Prairie Rd. (47.08312, -122.78070) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.6509 | Other (At-Grade) Single-Lane | 2002 | Constructed September 14, 2002. Previously controlled by one-way stop Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | College St. / 45th Ave. (47.00710, -122.82310) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.0923 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2002 | Completed November 6, 2002. Previously controlled by two-way stop Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | SR 510 (Marvin Rd.) / Pacific Ave. (47.03941, -122.76480) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.5572 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2003 | Completed July 28, 2003. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | Pacific Ave. / Golf Club Rd. / Lacey Blvd. (47.03786, -122.82860) | Roundabout Existing | All-Way Yield None | 6 Approaches 0 Driveways 61.8604 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2003 | Completed July 22, 2003. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | Pacific Ave. / Lacey Blvd. / Lacey St. / Homann Dr. (47.03677, -122.80630) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 53.7220 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2003 | Completed September 16, 2003. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Federal Way,
                WA King Co. United States | S 323rd St. / 32nd Ave. S (47.31214, -122.29250) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 44.5368 | Other (At-Grade) Single-Lane | 2000 | Opened April 2000. ICD estimated from Google Maps linework. | 
| Seattle,
                WA King Co. United States | 22nd Ave. E / E Thomas St. (47.62138, -122.30360) | Traffic Calming Circle Existing | Uncontrolled Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2006 | |
| Yakima,
                WA Yakima Co. United States | N. 5th Ave. / Fruitdale Blvd. (46.61242, -120.51870) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 31.1760 | Other (At-Grade) Single-Lane | 2004 | Completed July 1, 2004. Major street makes a 90-degree turn through the intersection. Previously controlled by one-way stop ICD estimated from Google Maps linework. | 
| Swinomish Tribal Community,
                WA Skagit Co. United States | SR 20 / Padilla Heights Rd. (48.45519, -122.51940) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 37.2280 | Other (At-Grade) Single-Lane | 2002 | The ground breaking ceremony was held October 2002. The client is the Swinomish Tribe. Opened October 2002. Functional Class: Local ICD estimated from Google Maps linework. | 
| La Conner,
                WA Skagit Co. United States | LaConner-Whitney Rd. / Chilberg Rd. / Morris Sr. (48.39234, -122.48660) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 28.5504 | Other (At-Grade) Single-Lane | 2003 | Roundabout replaces a Y intersection. The center island is under private ownership and contains an exisitng granite monument. Opened September 2003. Previously controlled by one-way stop Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Kennewick,
                WA Benton Co. United States | 12th Ave. / Irving St. (46.19768, -119.19670) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.9874 | Other (At-Grade) Single-Lane | 2001 | Functional Class: Collector ICD estimated from Google Maps linework. | 
| Gig Harbor,
                WA Pierce Co. United States | Borgen Blvd. / 51st (47.35959, -122.60640) | Roundabout Existing | All-Way Yield Active Pedestrian Warning (flashing yellow) | 4 Approaches 0 Driveways 35.5974 | Other (At-Grade) Single-Lane | 2002 | In-pavement flashers in use on all crosswalks. Striped-out apron for future conversion to multilane. Opened September 2002. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Gig Harbor,
                WA Pierce Co. United States | Borgen Blvd. / SR 16 SB Ramps (47.35868, -122.61610) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.8342 | Freeway Ramps (Grade-Separated) Single-Lane | 2004 | Opened March 2004. ICD estimated from Google Maps linework. | 
| Kent,
                WA King Co. United States | S. 216th St. / 42nd Ave. S / 40th Pl. S (47.40843, -122.28120) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 23.4402 | Other (At-Grade) Single-Lane | 2001 | Opened July 2001. ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | Marvin Rd. NE / Main St. NE (47.06709, -122.76828) | Roundabout Existing | All-Way Yield None | 2 Approaches 0 Driveways 48.7680 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2000 | Roundabout installed, although cross street not initially constructed. | 
| Sammamish,
                WA King Co. United States | NE Inglewood Hill / 216th Ave. NE (47.61554, -122.05180) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 31.3989 | Other (At-Grade) Single-Lane | 2001 | October 2001. ICD estimated from Google Maps linework. | 
| University Place,
                WA Pierce Co. United States | Grandview Dr. / 56th St. W (47.20565, -122.56890) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 24.3417 | Other (At-Grade) Single-Lane | 2000 | Opened September 2000. ICD estimated from Google Maps linework. | 
| University Place,
                WA Pierce Co. United States | Grandview Dr. / 62nd Ct. W / Park Entrance (47.20033, -122.56890) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 26.7785 | Other (At-Grade) Single-Lane | 2000 | Opened September 2000. ICD estimated from Google Maps linework. | 
| University Place,
                WA Pierce Co. United States | Grandview Dr. / Bristonwood Dr. / 48th St. W (47.21334, -122.56880) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.9607 | Other (At-Grade) Single-Lane | 2000 | Opened September 2000. ICD estimated from Google Maps linework. | 
| University Place,
                WA Pierce Co. United States | Grandview Dr. / Cirque Dr. (47.21093, -122.56880) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 25.1506 | Other (At-Grade) Single-Lane | 2000 | Opened September 2000. ICD estimated from Google Maps linework. | 
| Seattle,
                WA King Co. United States | 21st Ave. E / E. Republican St. (47.62320, -122.30470) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 5.6349 | Other (At-Grade) Unknown | 2006 | ICD estimated from Google Maps linework. | 
| Seattle,
                WA King Co. United States | 29th Ave. S / S. Judkins St. (47.59217, -122.29550) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 12.8873 | Other (At-Grade) Unknown | 2006 | ICD estimated from Google Maps linework. | 
| Seattle,
                WA King Co. United States | 31st Ave. E / E. Denny St. (47.62016, -122.29230) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 64.4023 | Other (At-Grade) Unknown | 2006 | ICD estimated from Google Maps linework. | 
| Kennewick,
                WA Benton Co. United States | Columbia Park Drive #1 (46.22221, -119.15110) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 38.8367 | Other (At-Grade) Single-Lane | 2001 | Completed February 2001. Functional Class: Local ICD estimated from Google Maps linework. | 
| Kennewick,
                WA Benton Co. United States | Columbia Park Drive #2 (46.22223, -119.14630) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 54.5366 | Other (At-Grade) Single-Lane | 2001 | Completed February 2001 Functional Class: Local ICD estimated from Google Maps linework. | 
| Seattle,
                WA King Co. United States | Densmore Ave. N / N 137th St. (47.72867, -122.33830) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 16.8705 | Other (At-Grade) Unknown | 2006 | ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | Marvin Rd. / Britton Pkwy. (47.06905, -122.77090) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 46.3682 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2000 | Completed September 14, 2000. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Duvall,
                WA King Co. United States | SR 203 (Carnation-Duvall Rd.) / 124th St. / Novelty Hill (47.70910, -121.98440) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.9865 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2004 | http://www.wsdot.wa.gov/projects/sr203/NE124thNoveltyRd/ Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Gig Harbor,
                WA Pierce Co. United States | Borgen Blvd. / SR 16 NB Ramps / Burnham Dr. (47.35843, -122.61260) | Roundabout Existing | All-Way Yield None | 6 Approaches 0 Driveways 47.7339 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2001 | Oval shaped central island. 6 legged configuration includes a on-ramp (outbound)leg. Central island is used as a roadway storm detention pond. Completed Summer/Fall 2001. Previously controlled by one-way stop ICD estimated from Google Maps linework. |