Roundabouts Database Index

29948 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
Okemos, MI Ingham Co. United States	Hamilton Rd. / Marsh Rd. (42.71625, -84.42687)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 29.8350	Other (At-Grade) Multilane (2 Lane, unspecified)	2000	ICD estimated from Google Maps linework.
Dimondale, MI Eaton Co. United States	East Rd. / Creyts Rd. (42.64743, -84.64275)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 31.6250	Other (At-Grade) Single-lane w/ Traversable Central Island	2001	British-style mini-roundabout. http://www.teachamerica.com/roundabouts/RA054A_Waddell_ppr.pdf ICD estimated from Google Maps linework.
Davis, CA Yolo Co. United States	5th St. / Cantrill Dr. (38.55160, -121.72010)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 28.9547	Other (At-Grade) Single-Lane	1998	Police station on SW corner. Date estimated. ICD estimated from Google Maps linework.
Westfield, NJ Union Co. United States	NJ 28 / E. Broad St. (Westfield Circle) (40.64849, -74.35027)	Rotary Existing	Unknown Unknown	3 Approaches 0 Driveways 42.5896	Other (At-Grade) Multilane (2 Lane, unspecified)		Functional Class: Arterial ICD estimated from Google Maps linework.
Provo, UT Utah Co. United States	3700 North / 300 West (40.28282, -111.66310)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 28.2444	Other (At-Grade) Single-Lane	2001	ICD estimated from Google Maps linework.
Provo, UT Utah Co. United States	1375 West / 820 North (40.24470, -111.68280)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 28.2603	Other (At-Grade) Single-Lane	2001	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.
Juneau, AK Juneau United States	Douglas Hwy / North Douglas Hwy (58.29718, -134.43280)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 38.9134	Other (At-Grade) Single-Lane	2005	Previously controlled by one-way stop Functional Class: Arterial ICD estimated from Google Maps linework.
Bel Air, MD Harford Co. United States	MD 7 / Holly Oaks Drive (39.48848, -76.21669)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 34.1039	Other (At-Grade) Single-Lane	1999	Opened September 1999. ICD estimated from Google Maps linework.
Oak Grove, MD Prince Georges Co. United States	MD 193 (Watkins Park Dr.) / Oak Grove Rd. (38.87737, -76.78108)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 38.1207	Other (At-Grade) Single-Lane	2001	ICD estimated from Google Maps linework.
Park City, UT Summit Co. United States	Powderwood Dr. / Factory Outlet Parking (40.72733, -111.55255)	Other Existing	All-Way Yield None	3 Approaches 0 Driveways 24.4374	Other (At-Grade) Single-Lane	2000	Pedestrian access to central island. ICD estimated from Google Maps linework.
Park City, UT Summit Co. United States	Kilby Rd. / Factory Outlet Parking (40.73040, -111.55040)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 34.3918	Other (At-Grade) Multilane (2 Lane, unspecified)	2000	ICD estimated from Google Maps linework.
Henderson (Seven Hills), NV Clark Co. United States	Grand Hills Dr. / Rio Secoo Golf Club (35.97713, -115.11100)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 74.4214	Other (At-Grade) Single-Lane	1998	Functional Class: Collector ICD estimated from Google Maps linework.
Draper, UT Salt Lake Co. United States	300 East / 12200 South (40.52863, -111.88180)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 37.2193	Other (At-Grade) Single-Lane	2001	ICD estimated from Google Maps linework.
Gatineau, QC Outaouais Region Canada	Blvd. St.-Joseph (Rte. 105) / Rue Montcalm (45.43146, -75.73314)	Roundabout Existing	All-Way Yield Pedestrian Signal (red-yellow-green to drivers)	3 Approaches 0 Driveways 23.4678	Other (At-Grade) Multilane (2 Lane, unspecified)	2003	Opened December 9, 2003. Functional Class: Arterial ICD estimated from Google Maps linework.
Denver, CO Denver Co. United States	E. Lowry Blvd. / N. Uinta Way (39.71986, -104.89070)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 50.5258	Other (At-Grade) Multilane (2 Lane, unspecified)	1998	ICD estimated from Google Maps linework.
Denver, CO Denver Co. United States	E. Lowry Blvd. / Yosemite St. (39.72373, -104.88400)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 51.4416	Other (At-Grade) Multilane (2 Lane, unspecified)	1998	ICD estimated from Google Maps linework.
Boulder, CO Boulder Co. United States	Kings Ridge Blvd. / Edison Ave. (40.03098, -105.23950)	Other Existing	All-Way Yield None	3 Approaches 0 Driveways 23.7768	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Phoenix, AZ Maricopa Co. United States	Happy Valley Rd. / I-17 SB Ramps (33.71292, -112.12019)	Roundabout Removed	All-Way Yield None	3 Approaches 0 Driveways 62.4840	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2020	Initially constructed 2002, revised 2005. Removed in 2020, replaced with diverging diamond interchange: https://www.youtube.com/watch?v=Xgcxmf9UYWw. https://azdot.gov/adot-blog/requiem-roundabouts-least-ones-happy-valley-road 21442
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.
Advance, NC Davie Co. United States	NC 801 / I-40 EB Ramps (36.00655, -80.44083)	Roundabout Removed	All-Way Yield None	3 Approaches 0 Driveways 17.3907	Freeway Ramps (Grade-Separated) Single-Lane	2002	Developer-built "temporary" intersection fix. Previously controlled by one-way stop ICD estimated from Google Maps linework.
Malta, NY Saratoga Co. United States	Rte 67 (Dunning St.) / State Farm Pl. (42.96991, -73.80676)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 43.6952	Other (At-Grade) Multilane (2 Lane, unspecified)	2006	Part of a series of 5 roundabouts. ICD estimated from Google Maps linework.
Amelia Island, FL Nassau Co. United States	Beach Walker Rd. / Beachwood Rd. (30.55425, -81.44608)	Roundabout Removed	All-Way Yield None	3 Approaches 0 Driveways 27.4320	Other (At-Grade) Single-Lane	2012	Roundabout completed before 1999, removed 2011-2013.
Seward, NE Seward Co. United States	7th St. / 6th Ave. / 8th Ave. (40.91742, -97.10029)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 37.9050	Other (At-Grade) Single-Lane		Functional Class: Local ICD estimated from Google Maps linework.
The Villages, FL Sumter Co. United States	Buena Vista Blvd. / Old Mill Run (28.90720, -81.98250)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 57.5036	Other (At-Grade) Multilane (2 Lane, unspecified)	2003	Bypass lane for southbound through movement in addition to two entry lanes. ICD estimated from Google Maps linework.
Bloomington, IN Monroe Co. United States	High St. / Winslow Rd. / Rogers Rd. (39.13631, -86.50819)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 38.9078	Other (At-Grade) Single-Lane	1999	$497,000 construction cost. 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.
Greenwood Village, CO Arapahoe Co. United States	S. Monaco St. / E. Prentice Pl. (39.61977, -104.91350)	Traffic Calming Circle Existing	Unknown Unknown	3 Approaches 0 Driveways 14.7197	Other (At-Grade) Single-Lane	1999	ICD estimated from Google Maps linework.
Greenwood Village, CO Arapahoe Co. United States	Peoria St. / Cherry Creek Dr. (39.61015, -104.84800)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 25.7631	Other (At-Grade) Single-Lane	2000	ICD estimated from Google Maps linework.
Greenwood Village, CO Arapahoe Co. United States	S. Monaco St. / E. Dorado Pl. (39.61199, -104.91350)	Traffic Calming Circle Existing	Unknown Unknown	3 Approaches 0 Driveways 11.0410	Other (At-Grade) Single-Lane	1999	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
Littleton, CO Arapahoe Co. United States	Franklin St. / Cherryville Rd. (39.61832, -104.96920)	Traffic Calming Circle Existing	All-Way Yield None	3 Approaches 0 Driveways 8.2800	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Greenwood Village, CO Arapahoe Co. United States	S. Monaco St. / E. Berry Ave. (39.61682, -104.91340)	Traffic Calming Circle Existing	Unknown Unknown	3 Approaches 0 Driveways 11.9603	Other (At-Grade) Single-Lane	1999	ICD estimated from Google Maps linework.
Manhattan, KS Riley Co. United States	Kimball Ave. / Grand Mere Pkwy. (39.20168, -96.63786)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 32.3931	Other (At-Grade) Single-Lane	2000	Completed 3/2000. Built as part of new Colbert Hills Golf Course. Fatal crash January 31, 2010. 11861-05. Functional Class: Collector ICD estimated from Google Maps linework.
Lawrence, KS Douglas Co. United States	Sunflower Park Rd / Inverness Dr (38.93745, -95.29810)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 111.4785	Other (At-Grade) Single-Lane	2001	Next to Sunflower Elementary School and Southwest Junior High School. Functional Class: Collector ICD estimated from Google Maps linework.
Garnett, KS Harvey Co. United States	US 59 / US 169 (38.25832, -95.24861)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 46.8910	Other (At-Grade) Single-Lane	2006	None. Previously controlled by one-way stop Functional Class: Arterial ICD estimated from Google Maps linework.
Greeley, CO Weld Co. United States	W 18th St. / Promontory Cir. / (parking) (40.41203, -104.85840)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 42.6720	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2004	Part of 6 in vicinity.
Bend, OR Deschutes Co. United States	NW 14th St. / Newport Ave. (44.06230, -121.33170)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 32.6126	Other (At-Grade) Single-Lane	2005	ICD estimated from Google Maps linework.
Anchorage, AK Anchorage United States	Dowling Rd. / New Seward Hwy SB Ramps (61.16636, -149.85780)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 35.1352	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2004	Previously controlled by one-way stop ICD estimated from Google Maps linework.
Anchorage, AK Anchorage United States	Dowling Rd. / New Seward Hwy NB Ramps (61.16637, -149.85520)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 38.0151	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2004	Spiral striping. ICD estimated from Google Maps linework.
Quebec, QC Capitale-Nationale Region Canada	Rue de la Rive-Boisee N / Rue du Baumier (46.83577, -71.32956)	Other Existing	All-Way Yield None	3 Approaches 0 Driveways 40.0000	Other (At-Grade) Single-Lane		No splitter islands. ICD estimated from Google Maps linework.
Howard, WI Brown Co. United States	Lineville Rd. (CTH M) / Rockwell Ln. (44.59080, -88.08880)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 28.0674	Other (At-Grade) Single-Lane	1999	Roundabout is adjacent to Lineville Intermediate School, Middle School, and High School. School did not allow pedestrian crossings prior to roundabout due to unsafe conditions, now allows crossings using crossing guard. Completed October 1999. http://www.co.brown.wi.us/Planning/roundabouts.html Previously controlled by one-way stop Functional Class: Arterial ICD estimated from Google Maps linework.
Scottsdale, AZ Maricopa Co. United States	Princess Blvd. / Princess Dr. (33.64804, -111.91795)	Other Existing	All-Way Yield None	3 Approaches 0 Driveways 64.0077	Other (At-Grade) Multilane (2 Lane, 2x1 max)	1986	Painted spiral next to central island. Completed 1986. Reconfigured in 2007? 21442
Salt Lake City, UT Salt Lake Co. United States	South Campus Dr. / Center Campus Dr. (40.75968, -111.84490)	Roundabout Existing	All-Way Yield At-grade Rail Crossing Signals/Gates (controlling all approaches)	3 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2003	Light rail runs through center of roundabout. Gates on both circulatory roadway and on east and west approaches.
Las Vegas (Summerlin), NV Clark Co. United States	Desert Primrose Ln. / Spotted Leaf Ln. / Pavillion Center Dr. (36.14070, -115.33120)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 41.4737	Other (At-Grade) Multilane (2 Lane, unspecified)	1999	Functional Class: Collector ICD estimated from Google Maps linework.
Bayfield, CO La Plata Co. United States	CR 501 / Bayfield Center Dr. (37.23393, -107.60191)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 41.1480	Other (At-Grade) Single-Lane	2001	Bayfield Center Drive is a new roadway. Completed Fall 2001.
Astoria, OR Clatsop Co. United States	US 101 / Hwy 202 (Nehalem Highway) (46.18290, -123.86070)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 45.4797	Other (At-Grade) Multilane (2 Lane, unspecified)	2002	Opened September 2002. First multilane roundabout on Oregon state highway system. ICD estimated from Google Maps linework.
Lewisville, NC Forsyth Co. United States	Concord Church Rd. / US 421 SB Ramp / Williams Rd. (36.08978, -80.43072)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 29.9191	Freeway Ramps (Grade-Separated) Single-Lane	2000	Solved capacity problem. Previously controlled by one-way stop ICD estimated from Google Maps linework.
Clemmons, NC Forsyth Co. United States	Fraternity Church Rd. / Hope Church Rd. (36.02653, -80.34301)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 28.0113	Other (At-Grade) Single-Lane	1999	Existing three-legged intersection converted to a four-legged intersection by adding new Clemmons Middle School driveway at the roundabout. Previously controlled by one-way stop Functional Class: Local ICD estimated from Google Maps linework.
Federal Way, WA King Co. United States	Weyerhaeuser Way S / 33rd Pl S / 32nd Dr. S (47.29863, -122.29280)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 35.6385	Other (At-Grade) Multilane (2 Lane, unspecified)	2000	Opened April 2000. Previously controlled by one-way stop Functional Class: Arterial ICD estimated from Google Maps linework.
Greeley, CO Weld Co. United States	Promontory Cir. / W 18th St. (40.40869, -104.85120)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 42.6717	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2004	4 roundabouts in series; 6 in vicinity.
Greeley, CO Weld Co. United States	Promontory Cir. / Con Agra Dr. (40.41138, -104.85200)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 42.6720	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2004	4 roundabouts in series; 6 in vicinity.
Lawrence, KS Douglas Co. United States	24th Pl. / Crossgate Dr. (38.94130, -95.28875)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 26.9392	Other (At-Grade) Single-Lane	2001	Planned in connection with extention of 24th Place Functional Class: Collector ICD estimated from Google Maps linework.
Greeley, CO Weld Co. United States	Promontory Cir. / W 11th St. (40.41889, -104.84990)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 44.1960	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2004	4 roundabouts in series; 6 in vicinity.
Peoria, AZ Maricopa Co. United States	N Sunrise Point / Sunset Point (33.75294, -112.33084)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 80.7720	Other (At-Grade) Single-Lane	2004
(unincorporated), OR Washington Co. United States	NW Verboort Rd. / Cornelius-Shefflin Rd. (45.55150, -123.06410)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 52.6900	Other (At-Grade) Single-Lane	2003	Reverse curves on approaches. Designed as multilane with striped-out inner circulating and entry/exit lanes. ICD estimated from Google Maps linework.
Loveland, CO Larimer Co. United States	Plum Creek Dr. / Piney River Dr. (40.41253, -105.01850)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 29.0994	Other (At-Grade) Single-Lane	2001	Functional Class: Local ICD estimated from Google Maps linework.
Anchorage, AK Anchorage United States	C St. / O'Malley EB Ramps (61.12273, -149.88630)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 53.3400	Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x1 max)	2006
Anchorage, AK Anchorage United States	C St. / O'Malley WB Ramps (61.12404, -149.88630)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 53.3400	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2006
Windsor, CT Hartford Co. United States	Hayden Station Rd. / Pond Rd. (41.89371, -72.64065)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 24.0041	Other (At-Grade) Single-Lane	1998	Functional Class: Collector. Year Completed estimated (1992-2003). ICD estimated from Google Maps linework.
Las Vegas (Summerlin), NV Clark Co. United States	Vista Run Dr. / Park Vista Dr. (36.17820, -115.34610)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 46.2741	Other (At-Grade) Single-Lane	1995	Year completed estimated (1990-1999) ICD estimated from Google Maps linework.
Windsor, CT Hartford Co. United States	Prospect Hill Rd. / Lang Rd. (41.89153, -72.69762)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 25.7830	Other (At-Grade) Single-Lane	1998	Located at entrance to industrial park. Year Completed estimated (1992-2004). ICD estimated from Google Maps linework.
Scottsdale, AZ Maricopa Co. United States	N. Marshall Way / E. 5th Ave. (33.49802, -111.92900)	Other Existing	All-Way Stop None	3 Approaches 0 Driveways 23.9030	Other (At-Grade) Single-Lane		Stop controlled. ICD estimated from Google Maps linework.
Prescott, AZ Yavapai Co. United States	SR 89 / Willow Lake Rd. (34.59233, -112.42580)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 64.0080	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2006
Ottawa, ON City of Ottawa Canada	Bayview Rd. / Slidell St. / Burnside Ave. (45.40958, -75.72880)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 33.5384	Other (At-Grade) Single-Lane	2010	Functional Class: Collector 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.
Malta, NY Saratoga Co. United States	Rte 67 (Dunning St.) / I-87 SB Ramps (42.97024, -73.80309)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 50.2920	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2006	Painted spiral next to central island. Part of a series of 5 roundabouts.
Eugene, OR Lane Co. United States	Barger Dr. / Green Hill Rd. (44.08470, -123.20830)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 32.6002	Other (At-Grade) Single-Lane	1999	ICD estimated from Google Maps linework.
Lawrence, KS Douglas Co. United States	Monterey Way / Harvard Rd. (38.96400, -95.28833)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 15.7869	Other (At-Grade) Single-Lane	1999	Built as part of reconstrction of Monterey Way. Designed as part of City/State Safety Improvement Project. ICD estimated from Google Maps linework.
Lawrence, KS Douglas Co. United States	West Campus Rd. / Jayhawk Blvd. / Crescent Rd. (38.95905, -95.25105)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 29.7185	Other (At-Grade) Single-Lane	2013	Original circle built c. 1945, rebuilt 2013 as part of reconstruction of Jayhawk Boulevard. Encircles Chi Omega fountain. Functional Class: Collector ICD estimated from Google Maps linework.
Coventry, CT Tolland Co. United States	Daly Rd. / South St. (41.76721, -72.33688)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 24.9424	Other (At-Grade) Single-Lane	2004	ICD estimated from Google Maps linework.
St. Simons, GA Glynn Co. United States	Frederica Rd. / Lawrence Rd. (31.21650, -81.37550)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 40.8563	Other (At-Grade) Single-Lane	2006	ICD estimated from Google Maps linework.
Green Bay, WI Brown Co. United States	W. Mason St. (STH 32-STH 54) / US 41 NB Ramps (44.52415, -88.08103)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 43.4266	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)	2012	Series of 3 roundabouts. Opened August 31, 2012. ICD estimated from Google Maps linework.
Green Bay, WI Brown Co. United States	W. Mason St. (STH 32-STH 54) / US 41 SB Ramps (44.52418, -88.08284)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 45.9811	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)	2012	Series of 3 roundabouts. Opened August 31, 2012. ICD estimated from Google Maps linework.
Bel Air, MD Harford Co. United States	Tollgate Rd. / Marketplace Dr. (39.52092, -76.35262)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 28.5602	Other (At-Grade) Single-Lane	1996	Three leg, off-set roundabout - off-set due to lack of r/w on top side of Functional Class: Collector 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.
Columbia, MD Howard Co. United States	Trotter Rd. / South Wind Cir. (39.20956, -76.91891)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 23.1353	Other (At-Grade) Single-Lane	1997	Functional Class: Collector. Year Completed estimated (1993-2001). ICD estimated from Google Maps linework.
Truckee, CA Nevada Co. United States	Donner Pass Rd. / W. River St. / McIver Crossing (39.32510, -120.19200)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 35.1077	Other (At-Grade) Single-Lane	1998	Fatal crash. 11861-05. Functional Class: Arterial ICD estimated from Google Maps linework.
Decatur, GA DeKalb Co. United States	N Decatur Rd. / Lullwater Rd. (33.78744, -84.32914)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 27.4320	Other (At-Grade) Single-Lane	2004
Durango, CO La Plata Co. United States	Jenkins Ranch Rd. / Ophir Dr. (37.28321, -107.85120)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 26.6075	Other (At-Grade) Single-Lane	2004	ICD estimated from Google Maps linework.
Arcata, CA Humboldt Co. United States	Guintoli Ln. / US 101 SB Ramps (40.90400, -124.08920)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 39.7180	Freeway Ramps (Grade-Separated) Single-Lane	2005	ICD estimated from Google Maps linework.
Arcata, CA Humboldt Co. United States	Guintoli Ln. / US 101 NB Ramps (40.90492, -124.08510)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 34.3015	Freeway Ramps (Grade-Separated) Single-Lane	2005	ICD estimated from Google Maps linework.
Durango, CO La Plata Co. United States	Florida Rd. / Riverview Dr. (37.28319, -107.86900)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 30.4086	Other (At-Grade) Single-Lane	2010	ICD estimated from Google Maps linework.
Arcata, CA Humboldt Co. United States	West End Rd. / Spear Ave. / Saint Louis Rd. (40.88910, -124.08210)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 27.0866	Other (At-Grade) Single-Lane	1998	Functional Class: Arterial ICD estimated from Google Maps linework.
Columbia, MD Howard Co. United States	Cradlerock Way / Homespun Dr. (39.19095, -76.83787)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 22.2158	Other (At-Grade) Single-Lane	2001	Completed May 21, 2001. Previously controlled by one-way stop Functional Class: Collector 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.
Durango, CO La Plata Co. United States	(Mercy Regional Medical Center ring road) / (unknown) (37.23677, -107.82050)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 34.2308	Other (At-Grade) Single-Lane	2006	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.
Port Orchard, WA Kitsap Co. United States	Mile Hill Dr. (Hwy 166) / Bethel Ave. (47.53467, -122.62730)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 38.7045	Other (At-Grade) Single-Lane	1998	Previously a Y Intersection. Opened June 1998. Previously controlled by two-way stop Functional Class: Arterial ICD estimated from Google Maps linework.
Malta, NY Saratoga Co. United States	Rte 67 (Dunning St.) / I-87 NB Ramps (42.97052, -73.80057)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 50.2920	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2006	Painted spiral next to central island. Part of a series of 5 roundabouts.
Clackamas, OR Clackamas Co. United States	Monterey Ave. / Causey Ave. / William Otty Rd. (45.44020, -122.55510)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 37.7102	Other (At-Grade) Single-Lane	2004	ICD estimated from Google Maps linework.
Montpelier, VT Washington Co. United States	Keck Circle (Main St. / Spring St.) (44.26283, -72.57178)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 25.6594	Other (At-Grade) Single-Lane	1995	Main Street Middle School located one block NE of roundabout. ICD estimated from Google Maps linework.
Fort Walton Beach, FL Okaloosa Co. United States	Hollywood Blvd. / Doolittle Blvd. (30.41364, -86.66468)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 29.8704	Other (At-Grade) Single-Lane	1994
Tallahassee, FL Leon Co. United States	Killarney Way / Shamrock Dr. (30.51361, -84.22315)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 27.7810	Other (At-Grade) Single-Lane	1994	Completed August 1994. ICD estimated from Google Maps linework.
Short Pump, VA Goochland Co. United States	Capitol One Dr. / (unknown) (37.62693, -77.66927)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 37.8365	Other (At-Grade) Single-Lane	2004	ICD estimated from Google Maps linework.
Avon, CO Eagle Co. United States	Avon Rd. / I-70 WB Ramps (39.63782, -106.52080)	Roundabout Existing	All-Way Yield Active Pedestrian Warning (flashing yellow)	3 Approaches 0 Driveways 42.6720	Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max)	1997	Highway ref. pt. 70-166.62. Raindrop shaped.
Avon, CO Eagle Co. United States	Avon Rd. / I-70 EB Ramps (39.63683, -106.52170)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 44.1960	Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max)	1997	Highway ref. pt. 70-166.62. Raindrop shaped.
Durango, CO La Plata Co. United States	Jenkins Ranch Rd. / Lizard Head (south) (37.28605, -107.84710)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 24.7061	Other (At-Grade) Single-Lane	2004	ICD estimated from Google Maps linework.