Roundabouts Database Index

11364 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
Las Vegas, NV Clark United States	Lake South / Crystal Water Way (36.13289, -115.29050)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 25.0796	Other Single-Lane	1994	Completed August 1994. Functional Class: Collector ICD estimated from Google Maps linework.
(unincorporated), FL Palm Beach United States	Lakes at Boca Raton / Cain Blvd. (26.39603, -80.21160)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 21.3962	Other Single-Lane	1994	Completed November 1994. ICD estimated from Google Maps linework.
Lisbon, MD Howard United States	MD 94 / MD 144 (39.33700, -77.07360)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 23.0933	Other Single-Lane	1993	First roundabout in Maryland. Built initially as temporary, made permanent after one month. ICD estimated from Google Maps linework.
Gainesville, FL Alachua United States	SE 7th St. / SE 4th Ave. (29.64824, -82.31792)	Neighborhood Traffic Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 18.2880	Other Single-Lane	1992	Pedestrian crossings within circulatory roadway. Completed April 1992.
Fort Walton Beach, FL Okaloosa United States	Hollywood Blvd. / Doolittle Blvd. (30.41364, -86.66468)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 23.6896	Other Single-Lane	1994	ICD estimated from Google Maps linework.
Tallahassee, FL Leon United States	Killarney Way / Shamrock Dr. (30.51361, -84.22315)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 27.7810	Other Single-Lane	1994	Completed August 1994. ICD estimated from Google Maps linework.
Bradenton Beach, FL Manatee United States	SR 789 / Bridge St. (27.46500, -82.69847)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 14.8361	Other Single-Lane	1994	Completed August 1994. ICD estimated from Google Maps linework.
Short Pump, VA Goochland United States	Capitol One Dr. / (unknown) (37.62693, -77.66927)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 37.8365	Other Single-Lane	2004	ICD estimated from Google Maps linework.
Santa Barbara, CA Santa Barbara United States	Alameda Padre Serra / Montecito St. / Salinas St. / Sycamore Canyon Rd. (34.42903, -119.67720)	Roundabout Existing	All-Way Yield None	5 Approaches 1 Driveways 23.6427	Other Single-Lane	1992	Includes driveway into roundabout serving one home. ICD estimated from Google Maps linework.
Long Beach, CA Los Angeles United States	Los Alamitos Circle (Hwy. 1 / Lakewood Blvd. / Los Coyotes Diagonal) (33.78989, -118.14250)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 137.1600	Other Multilane (2 Lane)	1993	Traffic circle conversion. Modified in 2020 to reduce lanes. 21442
Las Vegas (Summerlin), NV Clark United States	Town Center Dr. / Hualapai Way (36.17850, -115.31770)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 70.1040	Other Multilane (2 Lane)	1990	Completed March 1990. Modified 2003 to reduce from three-lane entries to two-lane entries with add-lane right-turn bypasses on all legs. ICD estimated from Google Maps linework. 21442
Las Vegas (Summerlin), NV Clark United States	Town Center Dr. / Village Center Cir. / Library Hills Dr. (36.18960, -115.30360)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 91.4400	Other Multilane (2 Lane)	1990	Completed March 1990. Modified 2010 to reduce lane configuration. 21442
Boca Raton, FL Palm Beach United States	SW 18th St. / Juana Rd. (SW 12th Ave.) (26.33206, -80.11059)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 47.0977	Other Single-Lane		Raised splitter islands on SW 18th St., painted splitter islands on Juana Rd.. Flashing warning beacon on eastbound SW 18th St. approach. Year Completed unknown (before 1995). ICD estimated from Google Maps linework.
Vail, CO Eagle United States	Vail Rd. / I-70 WB Ramps / North Frontage Rd. / Spraddle Cr. Rd. (39.64477, -106.37770)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 29.4288	Other Multilane (2 Lane)	1995	Raindrop-shaped central island. ICD estimated from Google Maps linework.
Vail, CO Eagle United States	Vail Rd. / I-70 EB Ramps / South Frontage Rd. (39.64355, -106.37810)	Roundabout Existing	All-Way Yield None	5 Approaches 0 Driveways 49.6620	Other Multilane (2 Lane)	1995	Completed October 1995. Circular central island. ICD estimated from Google Maps linework.
Lothian, MD Anne Arundel United States	MD 2 / MD 408 / MD 422 (38.82973, -76.61590)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 28.8423	Other Single-Lane	1995	Completed October 1995. ICD estimated from Google Maps linework.
Elkton, MD Cecil United States	MD 213 (Fair Hill Rd.) / Leeds Rd. / Elk Mill Rd. (Lanzi Circle) (39.66364, -75.85529)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 34.0178	Other Single-Lane	1995	Previously controlled by two-way stop. Functional Class: Arterial ICD estimated from Google Maps linework.
Cearfoss, MD Washington United States	MD 63 / MD 58 / MD 494 (Cearfoss Pk) (39.70017, -77.77593)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 31.2431	Other Single-Lane	1995	Completed December 1995. ICD estimated from Google Maps linework.
Towson, MD Baltimore United States	MD 45 / MD 146 / Joppa Rd. / Allegheny Ave. (39.40185, -76.60230)	Roundabout Existing	All-Way Yield None	5 Approaches 0 Driveways 47.9892	Other Multilane (2 Lane)	1998	Opened October 1998. Exit striping retrofitted to roundabout after opening. Hotdog/racetrack shape. ICD estimated from Google Maps linework. 21442
Lake Worth, FL Palm Beach United States	Lake Worth Ave. (SR 802) / A St. (26.61670, -80.06500)	Roundabout Existing	All-Way Yield Pedestrian Signal (red-yellow-green to drivers)	4 Approaches 0 Driveways 42.7103	Other Multilane (2 Lane)	2002	ICD estimated from Google Maps linework.
Naples, FL Collier United States	8th St. S / 12th Ave. S (26.13267, -81.79491)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 18.2281	Other Single-Lane	1996	Installed for community enhancement. ICD estimated from Google Maps linework.
Naples, FL Collier United States	7th St. N. / 3rd Ave. N. (26.15530, -81.80524)	Neighborhood Traffic Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 9.6483	Other Single-Lane	1998	Installed for traffic calming. Detailed traffic volume, speed data available. ICD estimated from Google Maps linework.
Tavares, FL Lake United States	Main St. / Disston Ave. / Lake Dora Dr. (28.80215, -81.72475)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 20.9315	Other Single-Lane	1996	Railroad tracks running along edge of central island. RR unprotected, train frequency 1-2/wk, 10 mph. ICD estimated from Google Maps linework.
Clovis, NM Curry United States	Hwy 245 (Llano Estacado Blvd.) / Norris St. (34.43384, -103.17830)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 44.3276	Other Single-Lane	2006	Completed February 27, 2006. Website: http://www.cityofclovis.org/roundabout/roundabout.htm ICD estimated from Google Maps linework.
Taneytown, MD Carroll United States	MD 140 / MD 832 / Antrim Blvd. (39.64809, -77.15468)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 40.4627	Other Multilane (2 Lane)	1996	Completed August 1996. Curbs set for double lane, striped for single outer circulating lane. ICD estimated from Google Maps linework.
Hilton Head, SC Beaufort United States	Whooping Crane Way / Main St. (32.21647, -80.72187)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 44.4598	Other Single-Lane	1996	Completed February 1996. ICD estimated from Google Maps linework.
Addison, TX Dallas United States	Mildred St. / Quorum Dr. (32.96138, -96.82592)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 49.1022	Other Multilane (2 Lane)	1997	ICD estimated from Google Maps linework.
Montpelier, VT Washington 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 Single-Lane	1995	Main Street Middle School located one block NE of roundabout. ICD estimated from Google Maps linework.
Sarasota, FL Sarasota United States	St. Armands Circle (SR 780 / Blvd. of the Presidents / John Ringling Blvd.) (27.31842, -82.57722)	Other Existing	Other None	5 Approaches 0 Driveways 118.8460	Other Multilane (2 Lane)		Shopping district. Completed 1940? Functional Class: Arterial ICD estimated from Google Maps linework.
Sarasota, FL Sarasota United States	South Gate Circle (Tuttle Ave. / Siesta Dr.) (27.30536, -82.51414)	Other Existing	All-Way Yield None	4 Approaches 0 Driveways 120.9825	Other Unknown		Yield control on circulatory roadway. ICD estimated from Google Maps linework.
Naples, FL Collier United States	7th St. N. / 7th Ave. N. (26.15619, -81.79971)	Neighborhood Traffic Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 22.5125	Other 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 United States	7th St. N. / 11th Ave. N. (26.15712, -81.79420)	Neighborhood Traffic Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 13.7160	Other Single-Lane	1996	Installed for traffic calming. Painted splitter islands. Detailed traffic volume, speed data available. ICD estimated from Google Earth.
Naples, FL Collier United States	7th St. N. / 12th Ave. N. (26.15734, -81.79282)	Neighborhood Traffic Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 13.7160	Other Single-Lane	1996	Installed for traffic calming. Detailed traffic volume, speed data available. ICD estimated from Google Earth.
Hollywood, FL Broward United States	Hollywood Blvd. / Rainbow Dr. (26.01050, -80.18360)	Other Existing	Two-Way Stop None	4 Approaches 0 Driveways 165.2974	Other Multilane (2 Lane)		Uncontrolled mainline, stop-control on side street Functional Class: Arterial ICD estimated from Google Maps linework.
Hollywood, FL Broward United States	Hollywood Blvd. / 26th Ave. (26.01110, -80.15920)	Signalized Roundabout/Circle Existing	Signal None	4 Approaches 0 Driveways 200.7172	Other Multilane (2 Lane)		Signal access to parking and building in center of circle. ICD estimated from Google Maps linework.
Hollywood, FL Broward United States	Hollywood Blvd. / S. Federal Hwy. (US 1) / Harrison St. / Tyler St. (26.01150, -80.14300)	Signalized Roundabout/Circle Existing	Signal None	7 Approaches 0 Driveways 70.8411	Other Multilane (2 Lane)		Signalized access, parking area in central island. ICD estimated from Google Maps linework.
Modesto, CA Stanislaus United States	Chandon Dr. / Calero Dr. (37.67642, -120.93380)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 27.4132	Other Single-Lane	2002	ICD estimated from Google Maps linework.
Modesto, CA Stanislaus United States	Bowen Ave. / Fremont Ave. (37.67470, -121.00260)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 18.9061	Other Single-Lane	2002	Previously controlled by twsc ICD estimated from Google Maps linework.
Stuart, FL Martin United States	S. Dixie Hwy / SR 76 / SR A1A (27.19767, -80.25266)	Other Existing	Other None	0 Approaches 0 Driveways 26.5569	Other Multilane (2 Lane)		Railroad crossing next to circle. ICD estimated from Google Maps linework.
Stuart, FL Martin United States	N. Colorado Ave. / E. Osceola St. (27.19860, -80.25300)	Neighborhood Traffic Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 32.9303	Other Single-Lane		ICD estimated from Google Maps linework.
Vail, CO Eagle United States	Chamonix Rd. / I-70 WB Ramps / North Frontage Rd. (39.62828, -106.42120)	Roundabout Existing	All-Way Yield None	5 Approaches 0 Driveways 40.4743	Other Multilane (2 Lane)	1997	Previously controlled by two-way stop ICD estimated from Google Maps linework.
Vail, CO Eagle United States	Chamonix Rd. / I-70 EB Ramps / South Frontage Rd. (39.62753, -106.42020)	Roundabout Existing	All-Way Yield None	5 Approaches 0 Driveways 38.6350	Other Multilane (2 Lane)	1997	Previously controlled by two-way stop ICD estimated from Google Maps linework.
Avon, CO Eagle 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 33.1108	Freeway Ramps Multilane (2 Lane)	1997	Highway ref. pt. 70-166.62. Raindrop-shaped central island. ICD estimated from Google Maps linework.
Avon, CO Eagle United States	Avon Rd. / I-70 EB Ramps (39.63683, -106.52170)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 36.7903	Freeway Ramps Multilane (2 Lane)	1997	Highway ref. pt. 70-166.62. Previously controlled by two-way stop ICD estimated from Google Maps linework.
Avon, CO Eagle United States	Avon Rd. / Beaver Creek Blvd. (39.63528, -106.52220)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 37.7109	Other Multilane (2 Lane)	1997	Previously controlled by two-way stop Functional Class: Arterial ICD estimated from Google Maps linework.
Avon, CO Eagle United States	Avon Rd. / Benchmark Rd. (39.63425, -106.52220)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 45.7200	Other Multilane (2 Lane)	1997	Originally had raindrop shape with locked gate access across south leg for emergency vehicles only. Redesigned and reopened May 2007 with full access. 21442
Avon, CO Eagle United States	Avon Rd. / US 6 (39.63110, -106.52260)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 40.4726	Other Multilane (2 Lane)	1997	Highway ref. pt. 6-170.04. Previously controlled by two-way stop Functional Class: Arterial ICD estimated from Google Maps linework.
Nederland, CO Boulder United States	SH 72 / SH 119 / 2nd St. / Bridge St. (39.96261, -105.51030)	Roundabout Existing	All-Way Yield None	5 Approaches 0 Driveways 23.8006	Other Single-Lane	1995	Opened June 1995. Previously controlled by two-way stop Functional Class: Arterial ICD estimated from Google Maps linework.
Tampa, FL Hillsborough United States	North Blvd. / Country Club Dr. (28.05466, -82.46759)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 14.7559	Other Single-Lane	1996	Completed June 1996. ICD estimated from Google Maps linework.
Winston-Salem, NC Forsyth United States	Salem Rd. / Old Salem Rd. / S. Main St. (36.08215, -80.24149)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 49.2265	Other Multilane (2 Lane)	2005	TIP Project U-2926. Functional Class: Arterial ICD estimated from Google Maps linework.
Scottsdale, AZ Maricopa United States	N. 64th St. / E. Lafayette Blvd. (33.49474, -111.94330)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 21.9119	Other Single-Lane	2000	ICD estimated from Google Maps linework.
Olmos Park, TX Bexar United States	Olmos Dr. / El Prado Dr. / McCullough Ave. (29.47094, -98.49162)	Roundabout Existing	All-Way Yield None	5 Approaches 0 Driveways 24.9549	Other Single-Lane	1996	Completed July 1996. ICD estimated from Google Maps linework.
Manchester, VT Bennington United States	Rte. 7A / Equinox (Grand Union) (43.17309, -73.06181)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 26.1304	Other Single-Lane	1997	Roundabout is in a retail/outlet district in a resort area. VT 7-A is posted as a Historic Highway and is the local business route, while the parallel US 7 is a two-lane, limited access bypass that carries through truck traffic. Previously controlled by two-way stop Functional Class: Collector ICD estimated from Google Maps linework.
Annapolis, MD Anne Arundel United States	MD 450 (West St.) / Taylor Ave. / Spa Rd. (Gateway Circle) (38.97630, -76.50486)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 45.4954	Other Multilane (2 Lane)	1999	Opened December 1999. ICD estimated from Google Maps linework.
De Pere, WI Brown United States	Scheuring Rd. (CTH F) / US 41 NB Ramps (44.43074, -88.10989)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 44.3491	Freeway Ramps Multilane (2 Lane)	2011	Series of 6 roundabouts. Opened September 2011. Circular central island. ICD estimated from Google Maps linework.
Acworth-Kennesaw, GA Cobb United States	W. Sandtown Rd. / Villa Rica Rd. (33.92703, -84.63775)	Roundabout Existing	All-Way Yield None	0 Approaches 0 Driveways 27.7478	Other Single-Lane	2008	ICD estimated from Google Maps linework.
Durango, CO La Plata United States	Jenkins Ranch Rd. / Lizard Head (south) (37.28605, -107.84710)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 24.7061	Other Single-Lane	2004	ICD estimated from Google Maps linework.
Durango, CO La Plata United States	Jenkins Ranch Rd. / Lizard Head (north) (37.28920, -107.84310)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 27.5556	Other Single-Lane	2004	ICD estimated from Google Maps linework.
Ritchie, MD Prince Georges United States	Ritchie-Marlboro Rd. / I-95 SB Ramps (38.86894, -76.84738)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 770.9968	Freeway Ramps Multilane (3+ Lane)	2001	Opening initially with two lanes. Expanded from two lanes to three lanes in 2010. 21442
Ritchie, MD Prince Georges United States	Ritchie-Marlboro Rd. / I-95 NB Ramps (38.86824, -76.84158)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 67.0560	Freeway Ramps Multilane (3+ Lane)	2001	Opened initially with two lanes. Expanded from two lanes to three lanes in 2010. 21442
Santa Barbara, CA Santa Barbara United States	Milpas St. / US 101 NB Ramps / Carpinteria St. (34.42070, -119.67810)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 75.8614	Other Multilane (2 Lane)	2000	Oblong central island. Completed April 2000. Experienced one single-vehicle fatality (date unknown). 11861-05. ICD estimated from Google Maps linework.
Cottonwood, AZ Yavapai United States	AZ 89A / Verde Heights Dr. (34.73999, -112.03740)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 50.0532	Other Multilane (2 Lane)	2009	Series of 5 roundabouts. Functional Class: Arterial ICD estimated from Google Maps linework.
Oshkosh, WI Winnebago United States	CTH E (Witzel Ave.) / Koeller St. (44.01805, -88.58098)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 42.0845	Other Multilane (2 Lane)	2010	Opened September 24, 2010. ICD estimated from Google Maps linework.
Carlsbad, CA San Diego United States	Legoland Dr. / Armada Dr. (33.13229, -117.31660)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 34.0049	Other Multilane (2 Lane)	1999	ICD estimated from Google Maps linework.
Phoenix, AZ Maricopa United States	S. Pointe Pkwy. W / S. Pointe Pkwy. E (33.37649, -111.97210)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 50.8650	Other Single-Lane	1994	Before 1997. ICD estimated from Google Maps linework.
Douglasville, GA Douglas United States	SR 5 / SR 166 (33.61361, -84.83688)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 25.8602	Other Single-Lane	2007	Fatal crash November 24, 2011. 11861-05. ICD estimated from Google Maps linework.
(unincorporated), MD Anne Arundel United States	Arundel Beach Rd. / Leelyn Dr. (39.07955, -76.54560)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 25.9594	Other Single-Lane	1999	ICD estimated from Google Maps linework.
Brunswick, MD Frederick United States	MD 17 / A St. / B St. / Maryland Ave. (39.31433, -77.62807)	Roundabout Existing	All-Way Yield None	5 Approaches 0 Driveways 42.5054	Other Single-Lane	2000	ICD estimated from Google Maps linework.
De Pere, WI Brown United States	Scheuring Rd. (CTH F) / US 41 SB Ramps (44.43050, -88.11402)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 53.7308	Freeway Ramps Multilane (2 Lane)	2011	Series of 6 roundabouts. Opened September 2011. ICD estimated from Google Maps linework.
Catonsville, MD Baltimore United States	MD 372 / Hilltop Rd. / Entrance to UMBC (39.25733, -76.71964)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 35.1417	Other Single-Lane	1998	Functional Class: Collector ICD estimated from Google Maps linework.
Lisbon, MD Howard United States	MD 94 / Old Frederick Rd. (Lisbon North) (39.34810, -77.06930)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 26.7839	Other Single-Lane	1999	ICD estimated from Google Maps linework.
Ellicott City, MD Howard United States	MD 103 / MD 100 WB Ramps (39.20846, -76.78294)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 33.3154	Freeway Ramps Single-Lane	1998	Opened November 1998. ICD estimated from Google Maps linework.
Ellicott City, MD Howard United States	MD 103 / MD 100 EB Ramps (39.20733, -76.78243)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 30.5396	Freeway Ramps Single-Lane	1998	Opened November 1998. ICD estimated from Google Maps linework.
Ellicott City, MD Howard United States	Snowden River Pkwy. / MD 100 WB Ramps (39.21233, -76.79544)	Roundabout Existing	All-Way Yield Metering Signal	3 Approaches 0 Driveways 25.9105	Freeway Ramps Single-Lane	1998	Opened November 1998. Metering signal on Snowden River Pkwy approach. ICD estimated from Google Maps linework.
Ellicott City, MD Howard United States	MD 104 (Waterloo Rd.) / MD 100 WB Ramps (39.22470, -76.80600)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 37.0085	Freeway Ramps Multilane (2 Lane)	1999	ICD estimated from Google Maps linework.
Federalsburg, MD Caroline United States	MD 307 / MD 313 / MD 318 (38.68938, -75.78949)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 35.4247	Other Single-Lane	1999	Rural, installed for safety reasons Previously controlled by two-way stop ICD estimated from Google Maps linework.
Portland, OR Multnomah United States	SE Ladd Circle (45.50850, -122.64940)	Other Existing	Unknown None	0 Approaches 0 Driveways 92.0689	Other Single-Lane		ICD estimated from Google Maps linework.
Cedar Lake Township, MN Scott United States	SH 13 (Langford Ave.) / CR 2 (260th St.) (44.57259, -93.50546)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 45.9429	Other Single-Lane	2005	Rural location, intersection of two 55-mph facilities. Previous 2-way stop had 2 fatal crashes and 50 injury crashes in 5 years. Opened to traffic in September 2005. During 12 months after opening, 1 reported crash involving single motorcycle running off road. Previously controlled by two-way stop Functional Class: Arterial ICD estimated from Google Maps linework.
Mount Rainier, MD Prince Georges United States	US 1 / 34th St. / Perry St. (38.93647, -76.96074)	Roundabout Existing	All-Way Yield None	5 Approaches 0 Driveways 30.6570	Other Multilane (2 Lane)	2001	Functional Class: Arterial ICD estimated from Google Maps linework.
Copley Township, OH Summit United States	Ridgewood Rd. / Hametown Rd. (41.11395, -81.66791)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 25.1947	Other Single-Lane	2006	Opened August 21, 2006. ICD estimated from Google Maps linework.
Decatur, GA DeKalb United States	N. Decatur Rd. / Lullwater Rd. (33.78700, -84.32900)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 90.3283	Other Single-Lane	2004	Functional Class: Arterial ICD estimated from Google Maps linework.
Durango, CO La Plata United States	Jenkins Ranch Rd. / Ophir Dr. (37.28321, -107.85120)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 26.6075	Other Single-Lane	2004	ICD estimated from Google Maps linework.
Huntsville, AL Madison United States	Old Monrovia Rd. / Providence Main St. / Indian Creek Rd. (34.75765, -86.68776)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 34.3429	Other Single-Lane	2004	Single-lane with right-turn only lanes. Built as staged construction with potential to be multilane. ICD estimated from Google Maps linework.
Camp Verde, AZ Yavapai United States	Middle Verde / Cliff Castle (34.60927, -111.86130)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 37.3535	Other Single-Lane	2005	ICD estimated from Google Maps linework.
De Pere, WI Brown United States	Grant St. (CTH EE) / Lawrence Dr. (44.44511, -88.09367)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 29.8430	Other Single-Lane	2008	Opened September 30, 2008. ICD estimated from Google Maps linework.
Truckee, CA Nevada 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 Single-Lane	1998	Fatal crash. 11861-05. Functional Class: Arterial ICD estimated from Google Maps linework.
Durango, CO La Plata United States	Jenkins Ranch Rd. / Kennebec Dr. (37.29216, -107.84010)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 23.7539	Other Single-Lane	2003	ICD estimated from Google Maps linework.
Dawsonville, GA Dawson United States	SR 9E (Lumpkin Campground Rd.) / Dawson Forrest Rd. (34.35427, -84.05168)	Roundabout Existing	All-Way Yield None	0 Approaches 0 Driveways 36.4818	Other Single-Lane	2007	ICD estimated from Google Maps linework.
Oakwood, GA Hall United States	Landrum Education Dr. / Frontage Rd. / Mathis Dr. (34.23434, -83.86434)	Roundabout Existing	All-Way Yield None	0 Approaches 0 Driveways 28.6347	Other Single-Lane	2007	Gainesville College ICD estimated from Google Maps linework.
Pearl, MS Rankin United States	MS 475 (Airport Rd.) / Old Brandon Rd. (32.29057, -90.07133)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 34.3273	Other Single-Lane	1997	Use of paint to achieve (?) deflection. ICD estimated from Google Maps linework.
Gorham, ME Cumberland United States	US 202 / Rte. 4 / Rte. 237 (43.72846, -70.42525)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 25.0285	Other Single-Lane	1997	Previously controlled by two-way stop ICD estimated from Google Maps linework.
(unincorporated), MD Prince Georges United States	Ft. Washington Rd. / Swan Creek Rd. (38.72498, -77.00491)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 25.1576	Other Single-Lane	1997	Fourth leg added. Year Completed estimated (before 2001). ICD estimated from Google Maps linework.
Bel Air, MD Harford United States	Tollgate Rd. / Marketplace Dr. (39.52092, -76.35262)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 28.5602	Other 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 United States	Banneker Rd. / Cul-de-sac (39.21141, -76.87041)	Neighborhood Traffic Circle Existing	Unknown Unknown	3 Approaches 0 Driveways 17.5824	Other Single-Lane		Functional Class: Local ICD estimated from Google Maps linework.
Columbia, MD Howard United States	Trotter Rd. / South Wind Cir. (39.20956, -76.91891)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 23.1353	Other Single-Lane	1997	Functional Class: Collector. Year Completed estimated (1993-2001). ICD estimated from Google Maps linework.
Topeka, KS Shawnee United States	Rice Rd. / I-70 WB Ramps / Sycamore Dr. (39.03610, -95.62310)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 44.5293	Freeway Ramps Single-Lane	2000	Part of a major realignment of I-70 and K-4. Sycamore Drive is one way with two westbound lanes (into the roundabout). Partial cloverleaf AB interchange type. Completed October 2000. ICD estimated from Google Maps linework.
Topeka, KS Shawnee United States	Rice Rd. / I-70 EB Ramps / Cyprus Drive (39.03190, -95.62320)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 52.8817	Freeway Ramps Single-Lane	2000	Part of a major realignment of I-70 and K-4. Cyprus Drive is One Way Eastbound (away from the roundabout). Partial cloverleaf AB interchange type. Completed October 2000. ICD estimated from Google Maps linework.
Green Bay, WI Brown 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 Multilane (3+ Lane)	2012	Series of 3 roundabouts. Opened August 31, 2012. ICD estimated from Google Maps linework.
Brattleboro, VT Windham United States	Rte. 9 / Rte. 5 (42.88500, -72.55670)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 53.3817	Other Multilane (2 Lane)	1999	Adjacent to I-89. Heavy truck volume (>7%) Functional Class: Arterial ICD estimated from Google Maps linework.
Green Bay, WI Brown 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 Multilane (3+ Lane)	2012	Series of 3 roundabouts. Opened August 31, 2012. ICD estimated from Google Maps linework.