Roundabouts Database Index

30321 Results

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City, State County Country	Intersection (Lat, Lng)	Type Status	Control Type / Other Control Type	Approaches / Driveways / ICD (m)	Functional Class / LaneType	Year Completed	Comments
Baltimore, MD Baltimore City United States	Washington Pl. / Mount Vernon Pl. (39.29756, -76.61568)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Lisburn, N. Ireland Lisburn & Castlereagh United Kingdom	A3 (Saintfield Rd.) / A49 (Saintfield Rd.) / Largymore Link / M1 Ramps (54.50584, -6.02852)	Signalized Roundabout/Circle Existing	Signal None	5 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Buenos Aires, Buenos Aires Autonomous City Autonomous City of Buenos Aires Argentina	Avenida Del Libertador / Avenida Sarmiento (-34.57496, -58.41508)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
New York City, NY New York Co. United States	W 110th St. / Central Park West / Frederick Douglass Blvd. / West St. (40.80058, -73.95821)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (3+ Lane)
Cedar Road Corridor, OH Cuyahoga Co. United States	Warrensville Center Rd. / Fairmount Blvd. / University Blvd. / John Carroll Blvd. / N Park Blvd. (41.48648, -81.53627)	Signalized Roundabout/Circle Existing	Signal Unknown	8 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (3+ Lane)		Hamburger shaped.
Bailleston, Scotland Glasgow City United Kingdom	A8 / Rhindhouse Rd. / (connector to M8 interchange) (55.85259, -4.09783)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Easton, PA Northampton Co. United States	Centre Square: Northampton St. / N 3rd St. / S 3rd St. (40.69124, -75.20914)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Pedestrian access to central island; parking along circulatory roadway. Converted to single-lane 2020-2022. Due to the park in the center that was required to be maintained, the signal control remains with pedestrians into the center. The signal control is now R-Y-G with a dedicated pedestrian phase instead of flashing yellow and flashing red with a pedestrian phase. There is still parking in the intersection area. https://www.wfmz.com/news/area/lehighvalley/a-look-at-eastons-centre-square-past-present-and-future/article_6bf44964-9104-11ec-89c1-a761ab933e39.html. https://scenicwilddelawareriver.com/entries/eastons-historic-centre-square-easton-pa/0e5928f5-9188-417c-b7b0-b3e745e16c80. https://www.easton-pa.com/welcome-easton-pa/news/easton-ring-road-and-centre-square-presentation-june-23-2021
Annemasse, Auvergne-Rhône-Alpes Haute-Savoie France	Avenue de Verdun / Avenue de Leman (46.18286, 6.24087)	Signalized Roundabout/Circle Existing	All-Way Yield Other	3 Approaches 0 Driveways	Other (At-Grade) Single-Lane		Median-running bus-only lane on north leg can make left turn at roundabout using signal-controlled bus-only lane through central island.
Basingstoke, England Hants United Kingdom	A30 (Winchester Rd.) / A340 (Ringway West - Ringway South) (51.25513, -1.10357)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Basingstoke, England Hants United Kingdom	A339 / M3 Ramps (51.25793, -1.06507)	Signalized Roundabout/Circle Existing	Signal Unknown	3 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Cox Green, England Windsor And Maidenhead United Kingdom	Holyport Interchange: A404 (M) / A308 (M) / M4 Ramps (51.49903, -0.72393)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Chalvey, England Slough United Kingdom	A355 (Tums Ln.) / Church St. / Cippenham Ln. (51.50871, -0.61241)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)		Hamburger shaped.
Chalvey, England Slough United Kingdom	Tuns Lane Interchange: A355 (Tuns Ln.) / M4 (Slough-Maidenhead By-Pass) Ramps (51.50311, -0.61641)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Brands Hill, England Slough United Kingdom	Langley Roundabout: A4 (London Rd.) / M4 (Slough-Maidenhead By-Pass) Ramps (51.49179, -0.54292)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
West Drayton, England Greater London United Kingdom	A408 (Stockley Rd.) / Prologis Park (51.50251, -0.45118)	Signalized Roundabout/Circle Existing	Signal Unknown	3 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Cranford, England Greater London United Kingdom	A408 / M4 (Heathrow Airport Spur Rd. / M4 (Chiswick to Langley Special Road) Ramps (51.49580, -0.45344)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Clewer Green, England Windsor And Maidenhead United Kingdom	A332 (Royal Windsor Way) / B3024 (Clarence Rd.) / B3173 (Imperial Rd.) (51.47994, -0.62424)	Signalized Roundabout/Circle Existing	Signal Unknown	5 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Hoogkerk, Groningen Groningen Netherlands	Professor Uilkensweg / N355 Ramps (53.23584, 6.51986)	Signalized Roundabout/Circle Existing	All-Way Yield Unknown	3 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Single-Lane		Oval shaped.
Warrington, England Warrington United Kingdom	Burtonwood Roundabout: Burtonwood Rd. / M62 Ramps / A5282 / A5280 (53.41550, -2.64681)	Signalized Roundabout/Circle Existing	Signal Pedestrian Signal (red-yellow-green to drivers)	5 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)		Oval shaped.
Warrington, England United Kingdom	A49 (Winwick Rd.) / A50 (Long Ln.) / Hawleys Ln. (53.40811, -2.59536)	Signalized Roundabout/Circle Removed	Signal Pedestrian Signal (red-yellow-green to drivers)	4 Approaches 0 Driveways	Other (At-Grade) Unknown
Warrington, England United Kingdom	Sankey Green: A57 (Sankey Way - Priesley St.) / A5061 (Sankey Way) / Lovely Ln. / Old Liverpool Rd. (53.38884, -2.61098)	Signalized Roundabout/Circle Existing	Signal Pedestrian Signal (red-yellow-green to drivers)	5 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Widnes, England Halton United Kingdom	Ditton Roundabout (53.35967, -2.74308)	Signalized Roundabout/Circle Removed	Signal Unknown	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Runcorn, England Halton United Kingdom	Bridgewater Interchange: A558 (Daresbury Expressway - Bridgewater Expressway) / A533 (Mersey Gateway) Ramps (53.34114, -2.70215)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)		Dogbone shaped.
Halewood, England Merseyside United Kingdom	Newstead Farm Interchange: A5300 / A562 Ramps (53.35991, -2.78931)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)		Oval shaped.
Winwick, England Warrington United Kingdom	Stump Cross: M62 Ramps / A49 (Winwick Rd.) / Newton Rd. (53.42261, -2.59787)	Signalized Roundabout/Circle Existing	Signal None	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Winwick, England Warrington United Kingdom	Winwick Park Roundabout: A49 (Newton Rd. - Winwick Link Rd.) / Newton Rd. / Winwick Park Ave. (53.42785, -2.59640)	Signalized Roundabout/Circle Existing	Signal Pedestrian Signal (red-yellow-green to drivers)	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, 2x2 max)
Preston, England Lancashire United Kingdom	Broughton Roundabout: M55 Ramps / A6 (Garstang Rd.) / James Towers Way (53.80085, -2.71677)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Ribbleton, England Lancashire United Kingdom	Samlesbury Interchange: M6 Ramps / A59 (Preston New Rd.) (53.76513, -2.63610)	Signalized Roundabout/Circle Existing	Signal None	5 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Bamber Bridge, England Lancashire United Kingdom	Bamber Bridge Interchange: M6 Ramps / M65 Ramps (53.71570, -2.66146)	Signalized Roundabout/Circle Existing	Signal None	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max)
Clayton-Le-Woods, England Lancashire United Kingdom	Clayton Brook Interchange: M61 Ramps / M65 Ramps (53.71832, -2.62983)	Signalized Roundabout/Circle Existing	Signal Metering Signal	5 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Rainhill, England Merseyside United Kingdom	Rainhill Stoops Interchange: A57 (Warrington Rd.) / A557 (Watkinson Way) / A570 (James Roby Way) / M62 Ramps (53.40340, -2.74570)	Signalized Roundabout/Circle Existing	Signal None	6 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Beechwood, England Halton United Kingdom	Rocksavage Roundabout: A557 (Rocksavage Expressway) / M56 EB Ramps / Weaver View (53.31317, -2.70697)	Signalized Roundabout/Circle Existing	Signal Metering Signal	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)		Hamburger shaped.
Preston Brook, England Halton United Kingdom	Preston Brook Interchange: M56 Ramps / A56 / Chester Rd. (53.32704, -2.64343)	Signalized Roundabout/Circle Existing	Signal None	5 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Altrincham, England Cheshire East United Kingdom	Bowdon Roundabout: M56 EB Ramps / A56 (Dunham Rd.) / Lymm Rd. (53.36911, -2.38660)	Signalized Roundabout/Circle Existing	Signal None	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)		Parking within central island.
Altrincham, England Cheshire East United Kingdom	Yarwoodheath Roundabout: M56 WB Ramps / A56 (Dunham Rd.) / Yarwoodheath Ln. (53.36609, -2.38560)	Signalized Roundabout/Circle Existing	Signal None	3 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2017
Glasgow, Scotland North Lanarkshire United Kingdom	Craiglinn Roundabout: B802 (Westfield Rd.) / B8048 / Ardgoil Dr. (55.94505, -4.03057)	Signalized Roundabout/Circle Existing	Signal None	5 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, 2x2 max)
Beckton, England Greater London United Kingdom	Beckton Roundabout: A13 (Alfred's Way) Ramps / A406 (N Circular Rd.) / A1020 (Royal Docks Rd.) (51.52515, 0.07331)	Signalized Roundabout/Circle Existing	Signal None	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Moss Bridge, England Blackburn With Darwen United Kingdom	Earcroft Interchange: M65 Ramps / A666 (Earcroft Way) / /Paul Rink Way / Mary Leaver Way (53.71651, -2.47915)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max)
Guide, England Blackburn With Darwen United Kingdom	Guide Interchange: M65 Ramps / A6077 (Haslingden Rd.) / B6232 (Haslingden Rd.) (53.72526, -2.44594)	Signalized Roundabout/Circle Existing	Signal None	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max)
Blackburn, England Lancs United Kingdom	Whitebirk Roundabout: M65 Ramps / A678 (Carl Fogarty Way) / A6119 (Whitebirk Dr.) / Blackburn Rd. (53.75548, -2.44236)	Signalized Roundabout/Circle Existing	Signal Pedestrian Signal (red-yellow-green to drivers)	6 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Preston, England Lancashire United Kingdom	A583 (Blackpool Rd.) / A582 (Edith Rigby Way) / A583 (Riversway) / A5085 (Blackpool Rd.) (53.76378, -2.78222)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Warrington, England United Kingdom	College Place: A574 (Birchwood Way) / B5210 (Woolston Grange Ave.) / Crab Ln. (53.41361, -2.54326)	Signalized Roundabout/Circle Unknown	Signal Pedestrian Signal (red-yellow-green to drivers)	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)		Pedestrian access to central island.
Cherry Hill, NJ Camden Co. United States	SR 38 / Church Rd. / Cooper Landing Rd. (39.94050, -75.00977)	Signalized Roundabout/Circle Existing	Signal Unknown	6 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (3+ Lane)		Hamburger shaped, oval shaped.
Keene, NH Cheshire Co. United States	Central Square: Main St. / Court St. / Washington St. / West St. (42.93403, -72.27855)	Signalized Roundabout/Circle Existing	Signal Pedestrian Signal (red-yellow-green to drivers)	6 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (3+ Lane)
Brooklyn, NY Kings Co. United States	Fraser Square (40.61996, -73.94125)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (3+ Lane)		Pedestrian access to central island.
Gainesville, FL Alachua Co. United States	SE 7th St. / SE 4th Ave. (29.64824, -82.31792)	Traffic Calming Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 18.2880	Other (At-Grade) Single-Lane	1992	Pedestrian crossings within circulatory roadway. Completed April 1992.
Naples, FL Collier Co. United States	7th St. N. / 3rd Ave. N. (26.15530, -81.80524)	Traffic Calming Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 9.6483	Other (At-Grade) Single-Lane	1998	Installed for traffic calming. Detailed traffic volume, speed data available. ICD estimated from Google Maps linework.
Naples, FL Collier Co. United States	7th St. N. / 7th Ave. N. (26.15619, -81.79971)	Traffic Calming Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 22.5125	Other (At-Grade) Single-Lane	1998	Installed for traffic calming. Detailed traffic volume, speed data available. Previously controlled by two-way stop Functional Class: Collector ICD estimated from Google Maps linework.
Naples, FL Collier Co. United States	7th St. N. / 11th Ave. N. (26.15712, -81.79420)	Traffic Calming Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 13.7160	Other (At-Grade) Single-Lane	1996	Installed for traffic calming. Painted splitter islands. Detailed traffic volume, speed data available. ICD estimated from Google Earth.
Naples, FL Collier Co. United States	7th St. N. / 12th Ave. N. (26.15734, -81.79282)	Traffic Calming Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 13.7160	Other (At-Grade) Single-Lane	1996	Installed for traffic calming. Detailed traffic volume, speed data available. ICD estimated from Google Earth.
Stuart, FL Martin Co. United States	N. Colorado Ave. / E. Osceola St. (27.19860, -80.25300)	Traffic Calming Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 32.9303	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Columbia, MD Howard Co. United States	Banneker Rd. / Cul-de-sac (39.21141, -76.87041)	Traffic Calming Circle Existing	Unknown Unknown	3 Approaches 0 Driveways 17.5824	Other (At-Grade) Single-Lane		Functional Class: Local ICD estimated from Google Maps linework.
Portland, OR Multnomah Co. United States	NW 25th Ave. / NW Quimby St. (45.53328, -122.70277)	Traffic Calming Circle Existing	One-Way/Two-Way Stop None	3 Approaches 0 Driveways 15.8958	Other (At-Grade) Single-Lane	1988	Completed 9/30/1988. ICD estimated from Google Maps linework.
Tallahassee, FL Leon Co. United States	Sutor Road / Old Sutor Road (30.42957, -84.21212)	Traffic Calming Circle Existing	All-Way Yield None	3 Approaches 0 Driveways 16.4770	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Portland, OR Multnomah Co. United States	NW 25th Ave. / NW Overton St. (45.53190, -122.70270)	Traffic Calming Circle Existing	One-Way/Two-Way Stop None	4 Approaches 0 Driveways 44.3420	Other (At-Grade) Single-Lane	1988	Completed 9/30/1988. ICD estimated from Google Maps linework.
Portland, OR Multnomah Co. United States	NW 25th Ave. / NW Marshall St. (45.53040, -122.70270)	Traffic Calming Circle Existing	One-Way/Two-Way Stop None	4 Approaches 0 Driveways 62.7498	Other (At-Grade) Single-Lane	1988	Completed 9/30/1988. ICD estimated from Google Maps linework.
Scottsdale, AZ Maricopa Co. United States	E. Via Linda / E. San Pablo Dr. (33.56833, -111.89350)	Traffic Calming Circle Existing	Unknown Unknown	3 Approaches 0 Driveways 49.7573	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Scottsdale, AZ Maricopa Co. United States	E. Via Linda / N. 87th St. (33.56715, -111.89500)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 69.6612	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Scottsdale, AZ Maricopa Co. United States	E. Via Linda / E. San Rafael Dr. (33.56711, -111.89565)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 18.2880	Other (At-Grade) Single-Lane		ICD estimated from Google Earth.
Arcata, CA Humboldt Co. United States	12th St. / I St. (40.87160, -124.08700)	Traffic Calming Circle Existing	Unknown Unknown	4 Approaches 0 Driveways 48.7687	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Arcata, CA Humboldt Co. United States	13th St. / J St. (40.87260, -124.08780)	Traffic Calming Circle Existing	Unknown Unknown	4 Approaches 0 Driveways 11.7404	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Scottsdale, AZ Maricopa Co. United States	E. Via Linda / N. 84th St. (33.56832, -111.89880)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 37.8156	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Scottsdale, AZ Maricopa Co. United States	E. Via Linda / N. 83rd Pl. (33.56770, -111.90100)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 63.6899	Other (At-Grade) Single-Lane		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	34th Ave. SW / SW Henderson St. (47.52286, -122.37530)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 42.7458	Other (At-Grade) Unknown	2006	ICD estimated from Google Maps linework.
Litchfield Park, AZ Maricopa Co. United States	W. Palmilla Blvd. / W. Alvarado Dr. (33.46978, -112.35190)	Traffic Calming Circle Existing	Unknown None	4 Approaches 0 Driveways 23.9107	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Litchfield Park, AZ Maricopa Co. United States	Wigwam Creek Blvd. / N. Rattler Way (33.51643, -112.32870)	Traffic Calming Circle Existing	Unknown Unknown	4 Approaches 0 Driveways 16.9277	Other (At-Grade) Single-Lane	2004	ICD estimated from Google Maps linework.
Seattle, WA King Co. United States	Linden Ave. N / N. 42nd St. (47.65774, -122.34850)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 56.3115	Other (At-Grade) Unknown	2006	ICD estimated from Google Maps linework.
Seattle, WA King Co. United States	44th Ave. SW / SW College St. (47.58301, -122.38780)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 37.0576	Other (At-Grade) Unknown	2006	ICD estimated from Google Maps linework.
Seattle, WA King Co. United States	30th Ave. SW / SW Cloverdale St. (47.52648, -122.37120)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 64.5176	Other (At-Grade) Unknown	2006	ICD estimated from Google Maps linework.
Seattle, WA King Co. United States	42nd Ave. SW / SW Hinds St. (47.57318, -122.38570)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 9.6690	Other (At-Grade) Unknown	2006	ICD estimated from Google Maps linework.
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
Seattle, WA King Co. United States	17th Ave. E. / E. Spring St. (47.61153, -122.31020)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 5.6361	Other (At-Grade) Unknown		ICD estimated from Google Maps linework.
Seattle, WA King Co. United States	40th Ave. SW / SW Manning St. (47.57122, -122.38250)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 7.2520	Other (At-Grade) Unknown	2006	ICD estimated from Google Maps linework.
Seattle, WA King Co. United States	28th Ave. NE / NE Hiram Pl. / NE 120th St. (47.71572, -122.29810)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 164.7289	Other (At-Grade) Unknown	2006	ICD estimated from Google Maps linework.
Seattle, WA King Co. United States	24th Ave. S / S. Dearborn St. (47.59557, -122.30120)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 13.6919	Other (At-Grade) Unknown	2006	ICD estimated from Google Maps linework.
Phoenix, AZ Maricopa Co. United States	E. Mountain View Rd. / N. Central Ave. (33.57510, -112.07360)	Traffic Calming Circle Existing	All-Way Yield None	0 Approaches 0 Driveways 16.9162	Other (At-Grade) Single-Lane	2006	Mini-roundabout ICD estimated from Google Maps linework.
Phoenix, AZ Maricopa Co. United States	N. 43rd St. / E. Stanford Dr. (33.51700, -111.98930)	Traffic Calming Circle Existing	All-Way Yield None	0 Approaches 0 Driveways 46.7997	Other (At-Grade) Single-Lane	2005	Mini-roundabout ICD estimated from Google Maps linework.
Seattle, WA King Co. United States	25th Ave. S / S Dearborn St. (47.59556, -122.30010)	Traffic Calming Circle Existing	One-Way/Two-Way Stop Unknown	0 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2006
Seattle, WA King Co. United States	26th Ave. S / S. Dearborn St. (47.59555, -122.29880)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 48.3244	Other (At-Grade) Unknown	2006	ICD estimated from Google Maps linework.
Seattle, WA King Co. United States	26th Ave. S / S. Judkins St. (47.59209, -122.29900)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 20.9420	Other (At-Grade) Unknown	2006	ICD estimated from Google Maps linework.
Seattle, WA King Co. United States	24th Ave. S / S. Norman St. (47.59301, -122.30120)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 41.0778	Other (At-Grade) Unknown	2006	ICD estimated from Google Maps linework.
Phoenix, AZ Maricopa Co. United States	South 20th Drive. / (none) (33.37556, -112.10290)	Traffic Calming Circle Existing	Unknown Unknown	2 Approaches 0 Driveways 16.9552	Other (At-Grade) Single-Lane	2003	Neighborhood traffic calming. 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.
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.
Seattle, WA King Co. United States	2nd Ave. NE / NE 91st St. (47.69499, -122.32710)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 8.0388	Other (At-Grade) Unknown	2006	ICD estimated from Google Maps linework.
Seattle, WA King Co. United States	Linden Ave. N / N. 36th St. (47.65116, -122.34860)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 35.4002	Other (At-Grade) Unknown	2006	ICD estimated from Google Maps linework.
Seattle, WA King Co. United States	Woodlawn Ave. N / N. 36th St. (47.65051, -122.33870)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 12.8730	Other (At-Grade) Unknown	2006	ICD estimated from Google Maps linework.
Seattle, WA King Co. United States	18th Ave. E. / E. Spring St. (47.61154, -122.30890)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 8.0516	Other (At-Grade) Unknown		ICD estimated from Google Maps linework.
Seattle, WA King Co. United States	4th Ave. N / N. Prospect St. (47.62890, -122.34880)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 10.4636	Other (At-Grade) Unknown	2006	ICD estimated from Google Maps linework.
Scottsdale, AZ Maricopa Co. United States	N. 74th St. / E. Sweetwater Ave. (33.60395, -111.92155)	Traffic Calming Circle Existing	All-Way Yield None	0 Approaches 0 Driveways 16.7640	Other (At-Grade) Unknown	2003	Modified by City in 2005 to improve operation as roundabout. 21442
Seattle, WA King Co. United States	Sunnyside Ave. N / N 43rd St. (47.65912, -122.33020)	Traffic Calming Circle Existing	Uncontrolled Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2006
London, ON Middlesex County Canada	Lambton Dr. / Oxford Dr. (43.00616, -81.27515)	Traffic Calming Circle Existing	Unknown Unknown	5 Approaches 0 Driveways 38.4291	Other (At-Grade) Single-Lane		Constructed sometime in the 1970s. Functional Class: Local 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.
Willimantic, CT Windham Co. United States	Eastern Rd. / (driveway) (ECSU Campus by clock tower) (41.72001, -72.21691)	Traffic Calming Circle Existing	All-Way Yield None	3 Approaches 0 Driveways 24.0693	Other (At-Grade) Single-Lane	1999	Not properly signed and painted, but lots of potential for demonstrating this intersection concept. ICD estimated from Google Maps linework.
Boulder, CO Boulder Co. United States	Arapahoe Ave. / 4th St. (40.01294, -105.29160)	Traffic Calming Circle Existing	One-Way/Two-Way Stop None	3 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Boulder, CO Boulder Co. United States	Arapahoe Ave. / 5th St. (40.01295, -105.28920)	Traffic Calming Circle Existing	One-Way/Two-Way Stop None	3 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Boulder, CO Boulder Co. United States	Balsam Ave. / 14th St. (40.02675, -105.27840)	Traffic Calming Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 16.4619	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Boulder, CO Boulder Co. United States	Balsam Ave. / 15th St. (40.02675, -105.27660)	Traffic Calming Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 8.2310	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.