| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| Kirkland,
                WA King Co. United States | NE 132nd St. / Totem Lake Blvd. NE / 116th Ave. NE / I-405 NB Entrance Ramp (47.71844, -122.18653) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.5760 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x1 max) | 2024 | https://wsdot.wa.gov/construction-planning/search-projects/i-405northeast-132nd-street-interchange-project | 
| Kirkland,
                WA King Co. United States | NE 132nd St. / 116th Way NE / I-405 SB Exit Ramp / 114th Pl. NE (47.71843, -122.18834) | Roundabout Existing | All-Way Yield Rectangular Rapid Flashing Beacon (RRFB) | 5 Approaches 0 Driveways 42.6720 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max) | 2024 | https://wsdot.wa.gov/construction-planning/search-projects/i-405northeast-132nd-street-interchange-project | 
| Marysville,
                WA Snohomish Co. United States | Marine Dr. NE / 64th St. NE / 31st Ave. NE (48.05407, -122.18921) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 36.7229 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2018 | Date from Streetview ICD estimated from Google Maps linework. | 
| Marysville,
                WA Snohomish Co. United States | Quil Ceda Blvd. / 30th Ave. NE (48.09620, -122.19019) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 37.4905 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2013 | Year Completed estimated (2012-2014). ICD estimated from Google Maps linework. | 
| Everett,
                WA Snohomish Co. United States | Riverfront Blvd. / 29th Ave. SE / 44th St. SE (47.95950, -122.19112) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 24.3840 | Other (At-Grade) Single-Lane | 2020 | |
| Everett,
                WA Snohomish Co. United States | 41st St. / Lowell Riverfront Trl. Ext. (47.96284, -122.19307) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 47.9842 | Other (At-Grade) Single-Lane | 2013 | Right-turn bypass lane on north leg. Open January 2013. ICD estimated from Google Maps linework. | 
| Kent,
                WA King Co. United States | SE 272nd St. / 106th Ave. SE (47.35794, -122.19865) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 18.2880 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2022 | Built by developer. | 
| Marysville,
                WA Snohomish Co. United States | SR 531 (172nd St. NE) / 23rd Ave. NE (48.15210, -122.19919) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.1480 | Other (At-Grade) Single-Lane | 2016 | Open January 2016. | 
| Marysville,
                WA Snohomish Co. United States | 25th Ave. NE / 174th St. NE (48.15374, -122.19930) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 24.7001 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2017 | May be large enough to qualify as a compact roundabout but has a fully traversable central island. ICD estimated from Google Maps linework. | 
| Deming,
                WA Whatcom Co. United States | SR 542 (Mount Baker Hwy) / Valley Hwy (48.81605, -122.20267) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 29.8847 | Other (At-Grade) Single-Lane | 2018 | ICD estimated from Google Maps linework. | 
| Renton,
                WA King Co. United States | N 10th St. / N 10th Pl. (47.49781, -122.20468) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.5280 | Other (At-Grade) Single-Lane | 2008 | June 2008. | 
| Arlington,
                WA Snohomish Co. United States | 236th St. NE / 19th Ave. NE (48.20959, -122.20491) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 44.1960 | Other (At-Grade) Single-Lane | 2021 | https://www.236safetyimprovements.org/project-updates | 
| Bellevue,
                WA King Co. United States | 100th Ave. NE / NE 10th St. / Belfair Ln. (47.61924, -122.20706) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 21.3360 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2020 | Year Completed estimated (2019-2020). | 
| Kent,
                WA King Co. United States | SE 244th St. / 100th Ave. SE (47.38335, -122.20736) | Traffic Calming Circle Existing | Other None | 4 Approaches 0 Driveways 11.3213 | Other (At-Grade) Single-Lane | 2016 | This is now a dog bone-shaped traffic circle with two-way Yield control on the east and west approaches and no control north-south. Previous control was stop-control on the east leg only before the west leg was built. ICD estimated from Google Maps linework. | 
| Sedro-Woolley,
                WA Skagit Co. United States | Fruitdale Rd. / Thompson Rd. (48.52726, -122.21071) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 23.7744 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2018 | |
| Kent,
                WA King Co. United States | 94th Ave. S / S 237th Pl. (47.38921, -122.21537) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 19.2024 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2023 | Raised but mountable central island, painted splitter islands. | 
| Everett,
                WA Snohomish Co. United States | 13th St. / 1st Ave. (48.00026, -122.21570) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 27.1714 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| North Auburn,
                WA King Co. United States | K St. SE / 2nd St. SE (47.30617, -122.21619) | Traffic Calming Circle Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Yarrow Point,
                WA King Co. United States | 92nd Ave. NE / NE Points Dr. / NE 33rd St. / SR 520 WB Off-Ramp (47.64153, -122.21728) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 86.9075 | Freeway Ramps (Grade-Separated) Single-Lane | 2014 | Open August 2014. ICD estimated from Google Maps linework. | 
| Auburn,
                WA King Co. United States | 22nd St. NE / I St. NE (47.32643, -122.21945) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 20.2385 | Other (At-Grade) Single-Lane | 2018 | ICD estimated from Google Maps linework. | 
| Hunts Point,
                WA King Co. United States | Hunts Point Rd. / NE 28th St. / 84th Ave. NE / SR 520 ramps (47.63600, -122.22744) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.6536 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2014 | Open June 2014. ICD estimated from Google Maps linework. | 
| Hunts Point,
                WA King Co. United States | 84th Ave. NE / NE 30th St. (47.63651, -122.22817) | Traffic Calming Circle Existing | All-Way Yield None | 3 Approaches 0 Driveways 159.3457 | Other (At-Grade) Single-Lane | 2014 | Originally built between 1990 and 2002. Modified June 2014 to realign south leg. No splitter islands. ICD estimated from Google Maps linework. | 
| Oakland,
                CA Alameda Co. United States | E 29th Ave. / E 9th St. / I-880 NB Onramp (37.77536, -122.23293) | Roundabout Existing | All-Way Yield Metering Signal | 2 Approaches 0 Driveways 0.0000 | Freeway Ramps (Grade-Separated) Single-Lane | 2018 | Ramp meter on south leg upstream of roundabout to meter freeway entrance ramp. | 
| Bothell,
                WA Snohomish Co. United States | Meridian Ave. S / 240th St. SE / 240th St. SW (47.78041, -122.23298) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.4320 | Other (At-Grade) Single-Lane | 2024 | https://bothellwa.gov/2001/Meridian-Ave-S-and-240th-St-SE-Roundabou | 
| Mercer Island,
                WA King Co. United States | N Mercer Way / 77th Ave. SE (47.58909, -122.23430) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 38.1000 | Other (At-Grade) Single-Lane | 2023 | https://letstalk.mercergov.org/Transit-Interchange/news_feed/transit-interchange-complete | 
| Mount Vernon,
                WA Skagit Co. United States | SR 9 / Old Day Creek Rd. / Francis Rd. (48.46779, -122.23666) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2018 | |
| Kent,
                WA King Co. United States | Willis St. / 4th Ave. (47.37808, -122.23747) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | 2020 | https://www.kentwa.gov/Home/Components/FacilityDirectory/FacilityDirectory/1660/568 | 
| Sedro-Woolley,
                WA Skagit Co. United States | SR 9-SR 20 (Cascade Loop) / Patrick St. / Skagit Way (48.51051, -122.24156) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2009 | Elliptical shaped. ICD = 120 ft x 105 ft. August 2009. ICD estimated from Google Maps linework. | 
| Lynnwood,
                WA Snohomish Co. United States | 6th Ave. W / 7th Pl. W (47.84259, -122.24328) | Traffic Calming Circle Existing | All-Way Stop Unknown | 3 Approaches 0 Driveways 0.0000 | Unknown Single-Lane | 2014 | |
| Edgewood Park,
                CA San Mateo Co. United States | Wellesley Crescent (Edgewood Rd. / Hyde St. / Arlington Rd. / Claremont Ave.) (37.49036, -122.24340) | Other Existing | All-Way Stop Unknown | 5 Approaches 0 Driveways 0.0000 | Other (At-Grade) Multilane (2 Lane, unspecified) | Elliptical shaped. | |
| Sedro-Woolley,
                WA Skagit Co. United States | SR 20 / Cook Rd. (48.50724, -122.24428) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 58.5542 | Other (At-Grade) Single-Lane | 2014 | Open July 2014. ICD estimated from Google Maps linework. | 
| Sedro-Woolley,
                WA Skagit Co. United States | SR 9 / Rhodes Rd. / Jameson Rd. (48.49863, -122.24720) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.4477 | Other (At-Grade) Single-Lane | 2016 | Open November 2016. ICD estimated from Google Maps linework. | 
| Sedro-Woolley,
                WA Skagit Co. United States | Cook Rd. / Ferry St. / Washington St. / Edward R Murrow St. (48.50715, -122.24729) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 69.6321 | Other (At-Grade) Single-Lane | 2013 | Open October 2013. ICD estimated from Google Maps linework. | 
| Hercules,
                CA Contra Costa Co. United States | Refugio Valley Rd. / Redwood Rd. / Falcon Way (37.99686, -122.24780) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 34.8238 | Other (At-Grade) Single-Lane | 1999 | ICD estimated from Google Maps linework. | 
| Berkeley,
                CA Alameda Co. United States | Piedmont Ave. / Channing Way (37.86780, -122.25188) | Other Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | Crosswalks within circulatory roadway. | |
| Lynnwood,
                WA Snohomish Co. United States | Filbert Rd. / Larch Way (47.82594, -122.25342) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 22.4519 | Other (At-Grade) Single-Lane | 2018 | ICD estimated from Google Maps linework. | 
| Brier,
                WA Snohomish Co. United States | Locust Way / Logan Rd. / Larch Way (47.80828, -122.25425) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2024 | https://snohomishcountywa.gov/3811/Larch-Way-and-Locust-Way---Bothell-2024 | 
| Lynnwood,
                WA Snohomish Co. United States | Filbert Rd. / Locust Way / Magnolia Rd. (47.82528, -122.25500) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 23.2541 | Other (At-Grade) Single-Lane | 2018 | ICD estimated from Google Maps linework. | 
| Seattle,
                WA King Co. United States | 61st Ave. S / S Norfolk St. (47.51337, -122.25705) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | 2006 | |
| Seattle,
                WA King Co. United States | 61st Ave. S / S. Cooper St. (47.51166, -122.25710) | Traffic Calming Circle Existing | Uncontrolled Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2006 | |
| Lynnwood,
                WA Snohomish Co. United States | Ash Way / 18th Ave. SW (47.85489, -122.25737) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 35.0520 | Other (At-Grade) Single-Lane | 2009 | October 2009. | 
| Berkeley,
                CA Alameda Co. United States | Ellsworth St. / Parker St. (37.86276, -122.26264) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | University Dr. / Hilgard Way (37.87213, -122.26356) | Other Existing | Other Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | Stop control on two of three legs. | |
| Berkeley,
                CA Alameda Co. United States | Fulton St. / Stuart St. (37.85890, -122.26415) | Traffic Calming Circle Existing | One-Way/Two-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | Fulton St. / Ward St. (37.85980, -122.26434) | Traffic Calming Circle Existing | One-Way/Two-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Mount Vernon,
                WA Skagit Co. United States | SR 538 (E College Way) / SR 9 (48.43002, -122.26460) | Roundabout Existing | Unknown Unknown | 3 Approaches 1 Driveways 38.0389 | Other (At-Grade) Single-Lane | 2007 | Opened July 2007. Rural. Fatal crash December 22, 2011. 11861-05. ICD estimated from Google Maps linework. | 
| American Canyon,
                CA Napa Co. United States | Devlin Rd. / Boone Dr. / (parking) (38.20182, -122.26679) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.6720 | Other (At-Grade) Single-Lane | 2022 | |
| Hercules,
                CA Contra Costa Co. United States | Maybeck Ln. / Craftsman Dr. (38.02209, -122.26706) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Napa,
                CA Napa Co. United States | SR 221 (Napa Vallejo Hwy.) / SR 12 WB Entrance Ramp (38.24207, -122.26930) | Roundabout Existing | All-Way Yield None | 2 Approaches 0 Driveways 44.1960 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x1 max) | 2024 | https://dot.ca.gov/caltrans-near-me/district-4/d4-projects/soscol-junction | 
| Napa,
                CA Napa Co. United States | Soscol Ferry Rd. / SR 221 / SR 12 EB Ramps (38.24117, -122.26975) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 47.2440 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x1 max) | 2024 | https://dot.ca.gov/caltrans-near-me/district-4/d4-projects/soscol-junction | 
| Vallejo,
                CA Solano Co. United States | Azuar Ave. / Sundance Ave. / Bagley St. / Walnut Ave. (38.09329, -122.27020) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 48.8772 | Other (At-Grade) Single-Lane | 2006 | ICD estimated from Google Maps linework. | 
| Auburn,
                WA Pierce Co. United States | Peasley Canyon Rd. / Peasley Canyon Way (47.30340, -122.27190) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 28.3463 | Other (At-Grade) Single-Lane | 2012 | Opened January 2012. ICD estimated from Google Maps linework. | 
| Berkeley,
                CA Alameda Co. United States | Marin Ave. / Los Angeles Ave. / Del Norte St. / Arlington Ave. (37.89015, -122.27240) | Other Existing | One-Way/Two-Way Stop None | 6 Approaches 0 Driveways 25.4489 | Other (At-Grade) Single-Lane | Free movement on Marin Ave.; rest are stop-controlled ICD estimated from Google Maps linework. | |
| Berkeley,
                CA Alameda Co. United States | Harmon St. / Ellis St. (37.84950, -122.27272) | Traffic Calming Circle Existing | One-Way/Two-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | Ellis St. / Fairview St. (37.85042, -122.27282) | Traffic Calming Circle Existing | One-Way/Two-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | Ellis St. / Woolsey St. (37.85132, -122.27293) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | King St. / Harmon St. (37.84937, -122.27376) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | King St. / Fairview St. (37.85028, -122.27384) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | McKinley Ave. / Allston Way (37.86865, -122.27384) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | King St. / Woolsey St. (37.85118, -122.27394) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | King St. / Prince St. (37.85210, -122.27405) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | Allston Way / Grant St. (37.86850, -122.27496) | Traffic Calming Circle Existing | One-Way/Two-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | Grant St. / Addison St. (37.87029, -122.27514) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | California St. / 62nd St. (37.84638, -122.27545) | Traffic Calming Circle Existing | One-Way/Two-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | California St. / Harmon St. (37.84908, -122.27602) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | California St. / Fairview St. (37.84998, -122.27619) | Traffic Calming Circle Existing | One-Way/Two-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | California St. / Woolsey St (37.85088, -122.27637) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | California St. / Prince St. (37.85176, -122.27656) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | California St. / Tyler St. (37.85266, -122.27674) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | California St. / Russell St. (37.85524, -122.27723) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Napa,
                CA Napa Co. United States | RiverSound Way / Kaiser Rd. (38.25745, -122.27725) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2024 | |
| Berkeley,
                CA Alameda Co. United States | California St. / Oregon St. (37.85632, -122.27743) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | California St. / Derby St. (37.85899, -122.27798) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | California St. / Parker St. (37.86075, -122.27835) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | Allston St. / California St. (37.86791, -122.27948) | Traffic Calming Circle Existing | One-Way/Two-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | California St. / Addison St. (37.86971, -122.27967) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| 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. | 
| Lynnwood,
                WA Snohomish Co. United States | 36th Ave. W / 172nd St. SW (47.84292, -122.28183) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2020 | Year Completed estimated (2019-2020). | 
| Berkeley,
                CA Alameda Co. United States | Channing Way / Edwards St. (37.86388, -122.28229) | Traffic Calming Circle Existing | One-Way/Two-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | Acton St. / Blake St. (37.86106, -122.28303) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Berkeley,
                CA Alameda Co. United States | Channing Way / West St. (37.86354, -122.28497) | Traffic Calming Circle Existing | One-Way/Two-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Anderson,
                CA Shasta Co. United States | Factory Outlets Dr. / I-5 NB Ramps / Locust St. / Deschutes Rd. (40.43782, -122.28600) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 49.0869 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2013 | Freeway off-ramp added with roundabout. Previously controlled by one-way stop 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. | 
| Graham,
                WA Pierce Co. United States | Rainier Ridge Blvd. E / 186th St. E / Glacier Way E (47.08689, -122.28699) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.0040 | Other (At-Grade) Single-Lane | 2019 | |
| Kensington,
                CA Contra Costa Co. United States | Kensington Circle (Colusa Ave. / Oak View Ave. / Berkeley Park Blvd.) (37.89957, -122.28708) | Other Existing | All-Way Stop None | 6 Approaches 0 Driveways 30.1578 | Other (At-Grade) Single-Lane | Stop control, parking along circulatory roadway. In 1992 the central island was a narrow oval on the NW-SE diagonal and traffic moved too fast. Over the years Contra Costa County has widened the island, closer to a circle, with paint and rumble strips, and slowed the traffic. ICD estimated from Google Maps linework. | |
| Mount Vernon,
                WA Skagit Co. United States | E Division St. / Waugh Rd. (48.42091, -122.28709) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 22.1934 | Other (At-Grade) Single-Lane | 2017 | ICD estimated from Google Maps linework. | 
| Berkeley,
                CA Alameda Co. United States | Matthews St. / Blake St. (37.86053, -122.28713) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Everson,
                WA Whatcom Co. United States | SR 542 (Mount Baker Hwy.) / Lawrence Rd. (48.84341, -122.28884) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 1 Driveways 29.0824 | Other (At-Grade) Single-Lane | 2011 | ICD estimated from Google Maps linework. | 
| El Cerrito,
                CA Contra Costa Co. United States | Lynn Ave. / Carmel Ave. (37.90074, -122.29015) | Traffic Calming Circle Existing | One-Way/Two-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| 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. | |
| Mukilteo,
                WA Snohomish Co. United States | South Rd. / Harbour Reach Dr. (47.88136, -122.29025) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 34.7469 | Other (At-Grade) Single-Lane | 2021 | |
| 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. | |
| Puyallup,
                WA Pierce Co. United States | 15th Ave. SE / 3rd St. SE (47.17741, -122.29100) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.0040 | Other (At-Grade) Single-Lane | 2010 | June 2010. | 
| El Cerrito,
                CA Contra Costa Co. United States | Lynn Ave. / Ramona Ave. (37.90057, -122.29100) | Traffic Calming Circle Existing | One-Way/Two-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Edgewood,
                WA Pierce Co. United States | Jovita Blvd. E / Emerald St. (47.25272, -122.29104) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 35.6695 | Other (At-Grade) Single-Lane | 2013 | Open July 2013. 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 | 32nd Ave. E / E. Pike St. (47.61408, -122.29140) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Unknown | ||
| Berkeley,
                CA Alameda Co. United States | Tenth St. / Bancroft Way (37.86439, -122.29186) | Traffic Calming Circle Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane |