Roundabouts Database Index

28782 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
Arlington, VA Arlington Co. United States	36th St. S / S Stafford St. (38.82894, -77.08800)	Other Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Parking within circulatory roadway.
San Martín de Porres, Lima Province of Lima Peru	Avenida Naranjal / Avenue Canta Callao (-11.97372, -77.08786)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Mount Vernon, VA Fairfax Co. United States	Mount Vernon Memorial Hwy (38.71132, -77.08612)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown		Parking along circulatory roadway.
Washington, DC N/A Co. United States	Ward Circle (Mass. Ave. / Nebraska Ave.) (38.93792, -77.08590)	Signalized Roundabout/Circle Existing	Signal None	0 Approaches 0 Driveways 80.8214	Other (At-Grade) Multilane (2 Lane, unspecified)		ICD estimated from Google Maps linework.
Talleysville, VA United States	Emmaus Church Rd. / (unknown) (37.50685, -77.08140)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 41.6873	Other (At-Grade) Multilane (2 Lane, unspecified)	2008	Right-turn only lanes on all approaches with only one circulating lane. ICD estimated from Google Maps linework.
Chevy Chase, MD Montgomery Co. United States	Rosemary Circle [Rosemary St. / Hillcrest Pl. / Stanford St.] (38.97789, -77.08055)	Other Existing	All-Way Stop Unknown	5 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Parking along circulatory roadway.
Olney, MD Montgomery Co. United States	Fox Valley Dr. / Hillcroft Dr. (39.12441, -77.07962)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown		No splitter islands.
Washington, DC N/A Co. United States	Tenley Circle (Nebraska Ave. / Wisconsin Ave. / Yuma St.) (38.94628, -77.07875)	Signalized Roundabout/Circle Existing	Signal None	0 Approaches 0 Driveways 73.3809	Other (At-Grade) Multilane (2 Lane, unspecified)		ICD estimated from Google Maps linework.
Talleysville, VA United States	Emmaus Church Rd. / (unknown) (37.51449, -77.07822)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 43.5777	Other (At-Grade) Multilane (2 Lane, unspecified)	2008	Right-turn only lanes on all approaches with only one circulating lane. ICD estimated from Google Maps linework.
Lima, Lima Province of Lima Peru	Avenida Universitaria / Vía Expresa Línea Amarilla (-12.03577, -77.07769)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Washington, DC United States	Chevy Chase Circle (Connecticut Ave. NW / Western Ave. NW / Chevy Chase Pkwy. NW / Grafton St.) (38.96761, -77.07716)	Rotary Existing	All-Way Yield None	7 Approaches 0 Driveways 109.7280	Other (At-Grade) Multilane (3+ Lane)		On boundary between DC and Maryland (Western Ave. is the boundary). Pedestrian access to central island.
Talleysville, VA United States	New Kent Hwy. / Old Church Rd. (37.52467, -77.07560)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 37.8885	Other (At-Grade) Single-Lane	2008	Two free flowing right-turn bypass lanes ICD estimated from Google Maps linework.
Olney, MD Montgomery Co. United States	Martins Dairy Cir. / Gooseneck Terrace (39.13176, -77.07439)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Olney, MD Montgomery Co. United States	Martins Dairy Cir. / Old Baltimore Rd. (39.13345, -77.07382)	Other Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Painted splitter islands.
Lisbon, MD Howard Co. United States	MD 94 / MD 144 (39.33700, -77.07360)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	1993	First roundabout in Maryland. Built initially as temporary, made permanent after one month.
Alexandria, VA Alexandria City United States	Beverley Circle: Old Dominion Blvd. / Chalfonte Dr. (38.83602, -77.07233)	Other Existing	All-Way Stop Unknown	3 Approaches 2 Driveways 0.0000	Other (At-Grade) Single-Lane		Parking within circulatory roadway. No splitter islands.
Los Olivos, Lima Province of Lima Peru	Ovalo Infantas (-11.94556, -77.07104)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Alexandria, VA Alexandria City United States	Washington Circle: Circle Hill Rd. / Beverley Dr. / Canyon Dr. (38.83533, -77.07047)	Other Existing	Other Unknown	5 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Pedestrian access to central island. No splitter islands. Mix of stop, yield, and uncontrolled entries.
Lisbon, MD Howard Co. 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 (At-Grade) Single-Lane	1999	ICD estimated from Google Maps linework.
Los Olivos, Lima Province of Lima Peru	Ovalo Naranjal (-11.97737, -77.06605)	Other Unknown	Unknown Unknown	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Mount Vernon, VA Fairfax Co. United States	Fort Willard Circle (38.78275, -77.06601)	Other Existing	Unknown Unknown	6 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Breña, Lima Province of Lima Peru	Plaza de la Bandera (-12.06746, -77.06112)	Other Existing	Unknown Unknown	5 Approaches 0 Driveways	Other (At-Grade) Unknown
Eisenhower East, VA Alexandria City United States	Eisenhower Ave. / Holland Ln (38.80044, -77.06079)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (2 Lane, unspecified)		0
Arlington, VA Arlington Co. United States	Memorial Dr. / Arlington Memorial Bridge (38.88573, -77.06004)	Rotary Existing	Unknown Unknown	0 Approaches 0 Driveways 114.3488	Other (At-Grade) Unknown		ICD estimated from Google Maps linework.
Tyendinaga, ON Hastings Canada	CR 10 (Deseronto Rd.) / CR 24 (Belleville Rd.) / CR 1 (44.23557, -77.05927)	Roundabout Unknown	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane	2021
Hampton, PA Adams Co. United States	Carlisle Pike (SR 94) / SR 394 / Stoney Point Rd. (39.92941, -77.05803)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020	https://www.ydr.com/story/news/2020/07/16/traffic-alert-12-road-projects-to-know-about-in-south-central-pennsylvania-penndot-roundabout/5359493002/
New Oxford, PA Adams Co. United States	Center Square (Lincoln Way / Hanover St. / Carlilse St.) (39.86388, -77.05586)	Other Existing	All-Way Yield None	4 Approaches 0 Driveways 73.3384	Other (At-Grade) Single-Lane		Converted town square: pedestrian access to central island; parking around circle. ICD estimated from Google Maps linework.
Wheaton, MD Montgomery Co. United States	Park Vista Dr. / Wintergate Dr. / Longmeade Crossing Dr. (39.10755, -77.05340)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2020	Painted splitter islands added 2020.
Emerald Isle, NC Carteret Co. United States	NC 58 / Mallard Dr. / Emerald Landing Dr. (34.66104, -77.05268)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 42.2420	Other (At-Grade) Multilane (2 Lane, unspecified)	2018	Developer project. ICD estimated from Google Maps linework.
Washington, DC N/A Co. United States	Sheridan Circle (Mass Ave. / 23rd St. / R St.) (38.91214, -77.05065)	Rotary Existing	Uncontrolled None	0 Approaches 0 Driveways 69.6989	Other (At-Grade) Multilane (2 Lane, unspecified)		Functional Class: Arterial ICD estimated from Google Maps linework.
Washington, DC N/A Co. United States	Washington Circle (Penn. Ave. / New Hampshire Ave. / 23rd St. / K St.) (38.90252, -77.05010)	Signalized Roundabout/Circle Existing	Signal None	8 Approaches 0 Driveways 119.8984	Other (At-Grade) Multilane (2 Lane, unspecified)		ICD estimated from Google Maps linework.
Olney, MD Montgomery Co. United States	Old Baltimore Rd. / Bishops Castle Dr. (39.14878, -77.04958)	Traffic Calming Circle Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Unknown Single-Lane	2019	Painted splitter islands on major street; no splitter islands on side street.
Emerald Isle, NC Carteret Co. United States	Emerald Dr. / Plantation Dr. (34.66452, -77.04878)	Other Existing	Other Unknown	4 Approaches 0 Driveways 28.4876	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Miraflores, Lima Province of Lima Peru	Avenida del Ejercito / Avenida Hipólito Unanue (-12.11308, -77.04851)	Unknown Existing	Unknown Unknown	6 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Breña, Lima Province of Lima Peru	Parque General Pedro Silva (-12.06179, -77.04826)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways	Other (At-Grade) Unknown
Jesús María, Lima Province of Lima Peru	Parque Santa Cruz (-12.07259, -77.04507)	Other Existing	Unknown Unknown	6 Approaches 0 Driveways	Other (At-Grade) Unknown
Jesús María, Lima Province of Lima Peru	Avenida Cuba (-12.07515, -77.04350)	Other Existing	Unknown Unknown	8 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Washington, DC N/A Co. United States	Dupont Circle (Mass Ave. / Conn. Ave. / New Hampshire Ave.19th St. / P St.) (38.90965, -77.04344)	Signalized Roundabout/Circle Existing	Signal None	10 Approaches 0 Driveways 137.5441	Other (At-Grade) Multilane (2 Lane, unspecified)		ICD estimated from Google Maps linework.
Phelps, NY Ontario Co. United States	Fort Hill Rd. / McIvor Rd. / CR 23 (42.91672, -77.04341)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane	2019	https://www.fltimes.com/news/ontario-county-s-newest-roundabout-opens-in-phelps/article_3fe5e190-49db-5f3b-a42f-7da6c3073a08.html .
Lima, Lima Province of Lima Peru	Plaza Ramón Castilla (-12.04341, -77.04302)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Lima, Lima Province of Lima Peru	Plaza dos de Mayo (-12.04641, -77.04281)	Signalized Roundabout/Circle Existing	Signal Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Miraflores, Lima Province of Lima Peru	Plaza Centro America (-12.11892, -77.04277)	Other Existing	Unknown Unknown	6 Approaches 0 Driveways	Other (At-Grade) Unknown
Franklin, VA Southampton Co. United States	Old Bridge Rd. / US 58 EB Ramps (36.69339, -77.04150)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 36.5760	Freeway Ramps (Grade-Separated) Single-Lane	2018	https://www.virginiadot.org/newsroom/hampton_roads/2018/major_milestone_met_months129525.asp
Courtland, VA Southampton Co. United States	US 58 Business (Main St. [Jerusalem Rd.]) / US 58 WB Ramps (36.69722, -77.04116)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 36.5760	Freeway Ramps (Grade-Separated) Single-Lane	2018	https://www.virginiadot.org/newsroom/hampton_roads/2018/major_milestone_met_months129525.asp
Carabayllo, Lima Province of Lima Peru	Avenida Huarangal / Avenida Periurbana (-11.82782, -77.04032)	Unknown Existing	Unknown Unknown	3 Approaches 0 Driveways	Other (At-Grade) Unknown
Miraflores, Lima Province of Lima Peru	Ovalo Julio Ramon Ribeyro (-12.11893, -77.04005)	Other Existing	Unknown Unknown	8 Approaches 0 Driveways	Other (At-Grade) Unknown
Wheaton-Glenmont, MD Montgomery Co. United States	Poplar Run Dr. / Night Sky Dr. / Moonlight Trail Dr. (39.07862, -77.03729)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Miraflores, Lima Province of Lima Peru	Ovalo Gutierrez (-12.11035, -77.03693)	Other Existing	Unknown Unknown	5 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Washington, DC N/A Co. United States	Scott Circle (Mass. Ave. / Rhode Isl. Ave. / 16th St. / N St.) (38.90725, -77.03654)	Signalized Roundabout/Circle Existing	Signal None	6 Approaches 0 Driveways 51.1161	Other (At-Grade) Multilane (2 Lane, unspecified)		ICD estimated from Google Maps linework.
Miraflores, Lima Province of Lima Peru	Ovalo Bolognesi (-12.12325, -77.03583)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)		Pedestrian access to central island; parking along circulatory roadway.
New Bern, NC Craven Co. United States	Broad St. / Front St. (35.10776, -77.03563)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 27.3573	Other (At-Grade) Single-Lane	2001	Part of enhancement project. ICD estimated from Google Maps linework.
Washington, DC United States	Main Dr. NW / 14th St. NW (38.97376, -77.03425)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
New Bern, NC Craven Co. United States	Sellhorn Blvd. / Inge Ct. (35.05745, -77.03385)	Other Existing	Unknown Unknown	3 Approaches 1 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands
James City, NC Craven Co. United States	Terminal Dr. / Airline Dr. / (parking) (35.07889, -77.03292)	Roundabout Existing	All-Way Yield None	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2021	Only 2 approaches but 4 exits. Year Completed estimated (2019-2022).
Wheaton-Glenmont, MD Montgomery Co. United States	Redspire Dr. / Tivoli Lake Blvd. (39.07315, -77.03208)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Washington, DC N/A Co. United States	Thomas Circle (Mass Ave. / Vermont Ave. / 14th St. / M St.) (38.90565, -77.03196)	Signalized Roundabout/Circle Existing	Signal None	6 Approaches 0 Driveways 75.2817	Other (At-Grade) Multilane (2 Lane, unspecified)		ICD estimated from Google Maps linework.
Sandy Spring, MD Montgomery Co. United States	Friends House Rd. / Quaker Ln. / (parking) (39.14071, -77.03036)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Washington, DC United States	Maryland Ave. SW (38.88408, -77.03003)	Other Existing	All-Way Yield Unknown	1 Approaches 1 Driveways 0.0000	Other (At-Grade) Multilane (2 Lane, unspecified)		Pedestrian access to central island; parking along circulatory roadway.
Wheaton-Glenmont, MD Montgomery Co. United States	Foggy Glen Dr. / Soaring Wing Ln. (39.08128, -77.02998)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Washington, DC N/A Co. United States	Logan Circle (Rhode Isl. Ave. / Vermont Ave. / 13th St. / P St.) (38.90965, -77.02963)	Signalized Roundabout/Circle Existing	Signal None	5 Approaches 0 Driveways 120.8157	Other (At-Grade) Multilane (2 Lane, unspecified)		ICD estimated from Google Maps linework.
Washington, DC United States	Main Dr. NW (38.97464, -77.02950)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
San Isidro, Lima Province of Lima Peru	Plaza 27 de Noviembre (-12.09835, -77.02929)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)		Pedestrian access to central island; parking along circulatory roadway.
Washington, DC United States	L'Enfant Plaza SW (38.88172, -77.02601)	Other Existing	Other Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Pedestrian access to central island.
James City, NC Craven Co. United States	W Grantham Rd. / Pine St. (35.06418, -77.02352)	Roundabout Existing	All-Way Yield At-grade Rail Crossing Signals/Gates (controlling approach only)	4 Approaches 0 Driveways 41.1480	Other (At-Grade) Single-Lane	2023	Roundabout relocated to be approximately 50 feet from railroad track. Intersection moved approximately 350 feet southwest of the original location. Previous intersection was controlled with stop signs on 3 of the approaches. https://www.witn.com/2023/09/05/james-city-traffic-roundabout-set-open-friday/
Washington, DC N/A Co. United States	Sherman Circle (Kansas Ave. / Illinois Ave. / Crittenden St.) (38.94733, -77.02190)	Rotary Existing	All-Way Stop None	6 Approaches 0 Driveways 89.1704	Other (At-Grade) Multilane (2 Lane, unspecified)		Functional Class: Arterial ICD estimated from Google Maps linework.
Washington, DC N/A Co. United States	Grant Circle (New Hampshire Ave. / Illinois Ave. / Varnum St. / NW 5th St.) (38.94312, -77.01926)	Rotary Existing	All-Way Stop None	8 Approaches 0 Driveways 120.7587	Other (At-Grade) Multilane (2 Lane, unspecified)		Functional Class: Arterial ICD estimated from Google Maps linework.
New Bern, NC Craven Co. United States	Haley Ray Ln. / Drew Ave. / Austin Ave. (35.03380, -77.01924)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands on three legs.
Sandy Spring, MD Montgomery Co. United States	Alexander Manor Dr. / Red Tail Ct. / Halex Hill Ct. (39.13149, -77.01778)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Washington, DC N/A Co. United States	G St. / 3rd St. SW (38.88127, -77.01520)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 26.9620	Other (At-Grade) Unknown		ICD estimated from Google Maps linework.
Washington, DC N/A Co. United States	H St. / Delaware Ave. (38.88028, -77.01262)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 31.6110	Other (At-Grade) Unknown		ICD estimated from Google Maps linework.
Mechanicsburg, PA Cumberland Co. United States	Cope Circle [Cope Dr. / Glime Dr./ Kower Dr.] (40.15949, -77.01261)	Other Existing	Unknown Unknown	3 Approaches 1 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Washington, DC N/A Co. United States	G St. / 1st St. SW (38.88119, -77.01228)	Traffic Calming Circle Existing	Unknown Unknown	0 Approaches 0 Driveways 31.6106	Other (At-Grade) Unknown		ICD estimated from Google Maps linework.
Oxon Hill, MD Prince Georges Co. United States	National Harbor Blvd. / American Way (38.78227, -77.01099)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.7236	Other (At-Grade) Multilane (2 Lane, unspecified)	2009	ICD estimated from Google Maps linework.
Silver Spring, MD Montgomery Co. United States	Ritchie Ave. / Oswego Ave. (38.98602, -77.00877)	Traffic Calming Circle Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Painted splitter islands.
Silver Spring, MD Montgomery Co. United States	Woodmoor Dr. / Lexington Dr. (39.02215, -77.00818)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Hampden Township, PA Cumberland Co. United States	Lambs Gap Rd. / Bali Hai Rd. (40.27016, -77.00786)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 40.0963	Other (At-Grade) Single-Lane	2019	http://www.cvschools.org/common/pages/UserFile.aspx?fileId=4627839 ICD estimated from Google Maps linework.
Sykesville, MD Carroll Co. United States	Old Washington Rd. (MD 97) / W Old Liberty Rd. (39.42906, -77.00755)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 34.1330	Other (At-Grade) Single-Lane	2000	Year Completed estimated (1995-2005). ICD estimated from Google Maps linework.
Fort Washington, MD Prince George's Co. United States	Oxon Hill Rd. / Kerby Hill Rd. (38.77951, -77.00648)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 34.4490	Other (At-Grade) Single-Lane	2015	ICD estimated from Google Maps linework.
Oxon Hill, MD Prince George's Co. United States	Oxen Hill Rd. / Cedar Ridge Dr. / Panorama Dr. (38.78452, -77.00597)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 34.4465	Other (At-Grade) Single-Lane	2015	ICD estimated from Google Maps linework.
Chorrillos, Lima Province of Lima Peru	Avenida Alameda Caballero de Alcántara / Avenida Alameda San Hermenegiloameda (-12.21595, -77.00513)	Unknown Existing	Unknown Unknown	4 Approaches 0 Driveways	Other (At-Grade) Unknown
(unincorporated), MD Prince Georges Co. 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 (At-Grade) Single-Lane	1997	Fourth leg added. Year Completed estimated (before 2001). ICD estimated from Google Maps linework.
Oxon Hill, MD Prince George's Co. United States	Oxon Hill Rd. / (parking lots) (38.79166, -77.00416)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 26.0650	Other (At-Grade) Single-Lane	2015	ICD estimated from Google Maps linework.
Ashton, MD Montgomery Co. United States	Harbour Town Dr. / Grand Cypress Ct. (39.13205, -77.00407)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Glenwood, MD Howard Co. United States	Burntwoods Rd. / Sharp Rd. (39.27702, -77.00369)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 29.5847	Other (At-Grade) Single-Lane	2006	Adjacent to Glenelg High School. ICD estimated from Google Maps linework.
Williamsport, PA Lycoming Co. United States	Via Bella St. / William St. (41.23740, -77.00319)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 43.1096	Other (At-Grade) Single-Lane	2009	ICD estimated from Google Maps linework.
Miraflores, Lima Province of Lima Peru	Ovalo Los Cabitos (-12.12880, -77.00104)	Other Existing	Uncontrolled Unknown	6 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Williamsport, PA Lycoming Co. United States	Via Bella St. / Court St. (41.23876, -77.00027)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 58.3764	Other (At-Grade) Single-Lane	2009	ICD estimated from Google Maps linework.
Cloverly, MD Montgomery Co. United States	Firestone Dr. / Sea Island Ct. (39.12744, -76.99807)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Williamsport, PA Lycoming Co. United States	Via Bella St. / Mulberry St. (41.24000, -76.99792)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 32.3309	Other (At-Grade) Single-Lane	2009	ICD estimated from Google Maps linework.
Cloverly, MD Montgomery Co. United States	Harbour Town Dr. / Firestone Dr. (39.12855, -76.99401)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Providence Forge, VA New Kent Co. United States	Brickshire Dr. / Royal Ln. (37.48050, -76.99323)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 35.0520	Other (At-Grade) Single-Lane	2000	Year Completed estimated (1994-2003).
Westminster, MD Carroll Co. United States	(Carroll Community College entrance) / (parking) (39.53096, -76.99236)	Other Existing	One-Way/Two-Way Stop Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Glenelg, MD Howard Co. United States	Pfefferkorn Rd. / Fox Stream Way / Old Rover Rd. (39.29067, -76.99226)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 28.9560	Other (At-Grade) Single-Lane	2005	Year Completed estimated (2004-2005).
Upper Allen Township, PA Cumberland Co. United States	W Lisburn Rd. / Grantham Rd. (40.16298, -76.99018)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 1 Driveways 16.4290	Other (At-Grade) Single-Lane	2018	https://www.abc27.com/news/top-video/new-traffic-circle-opens-in-upper-allen_20181003215307/1495637846 ICD estimated from Google Maps linework.
Washington, DC City of Washington Co. United States	Brentwood Rd NE / Bryant Rd NE / 13th St NE (38.92115, -76.98915)	Roundabout Existing	All-Way Yield None	4 Approaches 1 Driveways 39.0264	Other (At-Grade) Multilane (2 Lane, unspecified)	2010	First true roundabout in District of Columbia ICD estimated from Google Maps linework.
Glenelg, MD Howard Co. United States	Burntwoods Rd. / Ten Oaks Rd. (39.27315, -76.98805)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 37.9075	Other (At-Grade) Single-Lane	2008	ICD estimated from Google Maps linework.
Glenelg, MD Howard Co. United States	Ten Oaks Rd. / Pfefferkorn Rd. / MD 32 SB Ramps (39.27615, -76.98641)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 32.3587	Freeway Ramps (Grade-Separated) Single-Lane	2008	ICD estimated from Google Maps linework.
West Friendship, MD Howard Co. United States	Burntwoods Rd. / Andrea Dr. / MD 32 NB Ramps (39.27321, -76.98627)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 35.1338	Freeway Ramps (Grade-Separated) Single-Lane	2008	ICD estimated from Google Maps linework.
Glenelg, MD Howard Co. United States	Triadelphia Rd. / Ten Oaks Rd. (39.26399, -76.98621)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 32.0040	Other (At-Grade) Single-Lane	2000	Year Completed estimated (1992-2002).
Washington, DC N/A Co. United States	Pennsylvania Ave. / Potomac Ave. (38.88034, -76.98549)	Signalized Roundabout/Circle Existing	Signal None	0 Approaches 0 Driveways 81.8167	Other (At-Grade) Unknown		ICD estimated from Google Maps linework.