Roundabouts Database Index

28859 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
Ashland, MO Boone Co. United States	E Rte Y (Broadway) / Industrial Dr. (38.77420, -92.24893)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020	https://hi-in.facebook.com/SaraForMissouri/photos/a.1410590502324879/3879420848775153
Manassas, VA Manassas City United States	Sumner Lake Blvd. / Warfield St. / Stoddard Dr. (38.77334, -77.48041)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Building in central island.
Lisbon, Lisbon Lisboa Portugal	Rotunda dos Corvos [Eixo Central / Avenida Álvaro Cunhal] (38.77269, -9.14915)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Mira-Sintra, Lisbon Sintra Portugal	N250 (Avenida Fernão Mendes Pinto - / Avenida dos Bons Amigos) / Avenida Infante Dom Henrique / Rua Joaquim Guilherme da Costa Caldas (38.77223, -9.29235)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Westpark, CA Placer Co. United States	Mayhill Dr. / Parkham Dr. (38.77222, -121.36546)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown		No splitter islands.
Roseville, CA Placer Co. United States	Galleria Cir. / Antelope Creek Dr. (38.77210, -121.26705)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 42.6720	Other (At-Grade) Multilane (2 Lane, unspecified)	2007	Year Completed estimated (2007-2008).
Westpark, CA Placer Co. United States	Wharton Ln. (38.77188, -121.37325)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Warrensburg, MO Johnson Co. United States	SR 13 / US 50 EB Ramps (38.77151, -93.68568)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 40.9709	Freeway Ramps (Grade-Separated) Single-Lane	2011	ICD estimated from Google Maps linework.
Colorado Springs, CO El Paso Co. United States	Bradley Rd. / SR 83 (S Academy Blvd.) NB Ramps / Cody Dr. (38.77019, -104.75705)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Freeway Ramps (Grade-Separated) Single-Lane	2007	Year Completed estimated (2006-2007).
Gainesville, VA Prince William Co. United States	Glenkirk Rd. (Rte 675) / Bearhurst Dr. / Sedge Wren Dr. (38.77018, -77.61681)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 31.6599	Other (At-Grade) Single-Lane	2007	ICD estimated from Google Maps linework.
Olivais, Lisbon Lisboa Portugal	Avenida de Berlim / Alameda das Comunidades Portuguesas / Rua C-Aeroporto da Portela (38.76997, -9.12595)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
St Charles, MO St. Charles Co. United States	Veterans Memorial Pkwy. / Fairgrounds Rd. (38.76989, -90.50100)	Roundabout Unknown	All-Way Yield None	4 Approaches 0 Driveways 42.6717	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2017	Merging right-turn bypass lane on north leg.
O'Fallon, MO St. Charles Co. United States	Connecting Rd. / Alta Mira Ct. / MO 364 WB Ramps (38.76954, -90.74393)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 45.7200	Freeway Ramps (Grade-Separated) Single-Lane	2014
Olivais, Lisbon Lisboa Portugal	Praça Baden Powell [venida de Berlim / Avenida Cidade de Luanda / Rua Contra-Almirante Armando Ferraz] (38.76821, -9.10999)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Roseville, CA Placer Co. United States	Reserve Dr. / Fountains Driveway (38.76793, -121.27090)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.1106	Other (At-Grade) Single-Lane	2008	ICD estimated from Google Maps linework.
Roseville, CA Placer Co. United States	Reserve Dr. / Diamond Oaks Rd. (38.76679, -121.27120)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 29.7990	Other (At-Grade) Single-Lane	2008	ICD estimated from Google Maps linework.
Junction West, CA Placer Co. United States	Camino Real Way / Camino Real Way (38.76573, -121.35364)	Other Existing	All-Way Stop Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Falagueira-Venda Nova, Lisbon Amadora Portugal	Avenida Jorge Sampaio / Avenida Ruy Luís Gomes (38.76414, -9.21255)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Lewes, DE Sussex Co. United States	New Rd. / Lynn Rd. (38.76363, -75.17073)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2021	https://www.capegazette.com/article/roundabouts-abound/228013
Gainesville, VA Prince William Co. United States	Catbird Dr. / Yellow Hammer Dr. (38.76306, -77.61385)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 32.5944	Other (At-Grade) Single-Lane	2006	Functional Class: Local ICD estimated from Google Maps linework.
Bristow, VA Prince William Co. United States	Tappen Mill Way / Hayes Station Way / Sorrel River Way (38.76305, -77.55212)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 25.9080	Other (At-Grade) Single-Lane	2007	Year Completed estimated (2006-2008).
Mina de Água, Lisbon Amadora Portugal	Praça José Niza [Avenida General Humberto Delgado / Avenida Pedro Álvares Cabral] (38.76263, -9.23983)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Parque das Nações, Lisbon Lisboa Portugal	Praça Princípe Perfeito [Avenida de Ulisses / Avenida Dom João II] (38.76170, -9.09832)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Parque das Nações, Lisbon Lisboa Portugal	Alameda dos Oceanos / Avenida de Ulisses (38.76160, -9.09625)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Roseville, CA Placer Co. United States	Westhills Dr. / Morningstar Dr. / St. Basil Cir. (38.76151, -121.35340)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 32.5951	Other (At-Grade) Single-Lane	2001	Crosswalks adjacent to circle. ICD estimated from Google Maps linework.
O'Fallon, MO St. Charles Co. United States	Springhurst Pkwy. / Spring Borough Dr. (38.76123, -90.77537)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 39.6240	Other (At-Grade) Single-Lane	2006	Year Completed estimated (2005-2007).
Roseville, CA Placer Co. United States	Park Regency Dr. / Hiawatha Dr. / Sharifa Way / Bottlebrush Cir. (38.76105, -121.34870)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 37.2518	Other (At-Grade) Single-Lane	2001	Crosswalks adjacent to circle. ICD estimated from Google Maps linework.
Carnide, Lisbon Lisboa Portugal	Avenida Mário Soares / Estrada da Correia / Estrada Militar (38.76088, -9.19743)	Signalized Roundabout/Circle Existing	Signal None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Queluz, Lisbon Sintra Portugal	N117 (Estrada das Águas Livres - Avenida José Elias Garcia) / Rua Elias Garcia (38.76047, -9.24986)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Milton, DE Sussex Co. United States	Windstone Blvd. / Millstone Dr. (38.75985, -75.23334)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
São Marcos, Lisbon Sintra Portugal	Estrada de Paço de Arcos / Rua Marciano Tomaz da Costa / Rua do Alto do Cotão (38.75850, -9.30697)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Lewes, DE Sussex Co. United States	Kalmar St. / Pilotboat Dr. / Overfalls Dr. N (38.75793, -75.13541)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Pedestrian access to central island. No splitter islands on northeast, northwest, or southwest legs.
Falagueira-Venda Nova, Lisbon Amadora Portugal	Praça São Silvestre [Estrada dos Salgados / Rua Manuel Ribeiro de Pavia] (38.75755, -9.21864)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Roseville, CA Placer Co. United States	Washington Blvd. / All America City Blvd. / Lincoln St. (38.75716, -121.28871)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 47.2440	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2024	Lincoln St. has been converted to one-way in the vicinity of the roundabout, going away from the roundabout, with a separate right-in/right-out connection to Washington Blvd. https://www.roseville.ca.us/government/departments/public_works/roadways_traffic/current_projects/roundabout_washington_allamericacity_lincoln
Lewes, DE Sussex Co. United States	Red Tail Rd. / Peregrine Rd. / Kestrel Ct. (38.75699, -75.13283)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands on north, east, or south legs.
São Domingos de Benfica, Lisbon Lisboa Portugal	Rua Tomás da Fonseca / Rua António Albino Machado (38.75584, -9.16971)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Milton, DE Sussex Co. United States	Beulah Blvd. / Lonny Ln. (38.75529, -75.23646)	Other Existing	Unknown Unknown	3 Approaches 19 Driveways 0.0000	Other (At-Grade) Single-Lane
Lewes, DE Sussex Co. United States	Cadbury Circle (38.75500, -75.14035)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Parking along circulatory roadway.
Roseville, CA Placer Co. United States	Park Regency Dr. / Castlebridge Dr. / Hillingdon St. (38.75455, -121.34680)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 32.5983	Other (At-Grade) Single-Lane	2001	Crosswalks adjacent to circle. ICD estimated from Google Maps linework.
Lewes, DE Sussex Co. United States	Senators Dr. / Roth Dr. (38.75454, -75.13536)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
O'Fallon, MO St. Charles Co. United States	Paul Renaud Blvd. / Lake St Louis Blvd. / Curtis Ln. (38.75382, -90.80034)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2017	Year Completed estimated (2017-2018).
Lewes, DE Sussex Co. United States	N Village Main Blvd. / E Chesapeake St. (38.75335, -75.17058)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Pedestrian access to central island; parking along circulatory roadway.
São Domingos de Benfica, Lisbon Lisboa Portugal	Rua António Albino Machado / Avenida Rui Nogueira Simões / Rua São Tomás de Aquino (38.75251, -9.16758)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Maryland Heights, MO St. Louis Co. United States	Casino Center Dr. / (casino parking) (38.75175, -90.47969)	Other Existing	All-Way Yield None	3 Approaches 0 Driveways 39.1195	Other (At-Grade) Multilane (2 Lane, unspecified)	1999	Yield on circulatory roadway. Year Completed estimated (1996-2002) ICD estimated from Google Maps linework.
Lewes, DE Sussex Co. United States	Governors Blvd. / Stockley Blvd. / Ross Rd. (38.75168, -75.14361)	Unknown Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Porto Salvo, Lisbon Oeiras Portugal	Estrada de Leião / Estrada de Paço de Arcos / Estrada de São Marcos / Estrada Octávio Pato (38.75093, -9.30600)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)		Elliptical shaped.
Highland, IL Madison Co. United States	US 40 / IL 160 / Poplar St. (38.75010, -89.67197)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 40.9832	Other (At-Grade) Single-Lane	2004	Roundabout operating nicely with no accidents reported during first six months of operation. Completed October 2004. Functional Class: Arterial ICD estimated from Google Maps linework.
O'Fallon, MO St. Charles Co. United States	Preston Woods Pkwy. / Preston Woods Trl. / Flowering Ash Ln. (38.74881, -90.79714)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2009	Year Completed estimated (2008-2009).
Roseville, CA Placer Co. United States	Oak St. / Washington Blvd. (38.74817, -121.28306)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 39.6240	Other (At-Grade) Multilane (2 Lane, unspecified)	2015	At City Hall with fire station. Year Completed estimated (2014-2015).
O'Fallon, MO St. Charles Co. United States	Hwy DD / Dalriada Blvd. (38.74631, -90.75882)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 50.2920	Other (At-Grade) Single-Lane	2022	Right-turn-only lanes on southwest and northeast legs. Appears to be convertible to 2x1. https://www.sccmo.org/DocumentCenter/View/18378/OF_HIGHWAY-DD
Lewes, DE Sussex Co. United States	Bay Crossing Blvd. / Vessel Cove (38.74610, -75.14170)	Other Existing	Unknown Unknown	2 Approaches 6 Driveways 0.0000	Other (At-Grade) Single-Lane
Warrenton, VA Fauquier Co. United States	Vint Hill Pkwy. / Watson Ct. / Farm Station Rd. (38.74607, -77.67465)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 41.9170	Other (At-Grade) Single-Lane	2017	Fauquier County constructed a roundabout as part of the Vint Hill small area plan and new roadway alignments for Vint Hill Parkway/Watson and Weeks Roads. ICD estimated from Google Maps linework.
Linton Hall, VA Prince William Co. United States	Tartan Hills Pkwy. / Native Rocks Dr. / Seagate Way (38.74593, -77.58755)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 38.1911	Other (At-Grade) Single-Lane	2004	ICD estimated from Google Maps linework.
Alcochete, Setúbal Alcochete Portugal	Rua Cajus / Rua do Láparo / Rua Alecrins (38.74521, -8.94779)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
O'Fallon, MO St. Charles Co. United States	Phoenix Pkwy. / Redhawk Pkwy. / Red Hawk Pl. (38.74510, -90.73630)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 33.5341	Other (At-Grade) Single-Lane	2001	Year Completed estimated (1996-2002). ICD estimated from Google Maps linework.
Alcochete, Setúbal Alcochete Portugal	Praça Bartolomeu Dias [Avenida do Brasil / Rua 25 de Abril] (38.74507, -8.97179)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Alcochete, Setúbal Alcochete Portugal	Avenida do Brasil / Avenida Dom João / N119 (38.74440, -8.96961)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Warrensburg, MO Johnson Co. United States	SR 13 / State Hwy DD (38.74322, -93.68679)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 40.9872	Other (At-Grade) Single-Lane	2011	Functional Class: Arterial ICD estimated from Google Maps linework.
Lewes, DE Sussex Co. United States	Graves Dr. / Ann Barr St. / Silo Blvd. (38.74310, -75.18566)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Linton Hall, VA Prince William Co. United States	Tartan Hills Pkwy (VA 3254) / Broadsword Dr. (VA 3256) (38.74232, -77.58066)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 27.9462	Other (At-Grade) Single-Lane	2003	ICD estimated from Google Maps linework.
Lewes, DE Sussex Co. United States	Deep Valley Blvd. / William Dorsey St. (38.74128, -75.18701)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
O'Fallon, MO St. Charles Co. United States	Phoenix Pkwy. / Phoenix Dr. / Boardwalk Place Dr. (38.74122, -90.73747)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 33.5359	Other (At-Grade) Single-Lane	2001	Year Completed estimated (1996-2002). ICD estimated from Google Maps linework.
Easton, MD Talbot Co. United States	Lakelands Dr. / Superior Cir. (38.74048, -76.06518)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands on three legs.
Colorado Springs, CO El Paso Co. United States	Fontaine Blvd. / Lamprey Dr. (38.74007, -104.62463)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 45.7200	Other (At-Grade) Single-Lane	2018	Year Completed estimated (2017-2019).
Highland, IL Madison Co. United States	Broadway / Poplar St. (38.73957, -89.67148)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 44.7156	Other (At-Grade) Single-Lane	2008	Year Completed estimated (2007-2009). ICD estimated from Google Maps linework.
Colorado Springs, CO El Paso Co. United States	Nelson Blvd. / Harr Ave. (38.73903, -104.80268)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 38.1948	Other (At-Grade) Single-Lane	2004	ICD estimated from Google Maps linework.
Troy, IL Madison Co. United States	SR 162 / Lakeview Acres Rd. (38.73777, -89.93511)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 37.2639	Other (At-Grade) Single-Lane	2013	ICD estimated from Google Maps linework.
Cottleville, MO St. Charles Co. United States	Gutermuth Rd. / (unknown) (38.73697, -90.66532)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020
Camino, CA El Dorado Co. United States	Pondorado Rd. / (US 50 underpass) / (future road) (38.73683, -120.70547)	Roundabout Existing	All-Way Yield None	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2022	North leg passes under US 50. Future east leg not built. https://dot.ca.gov/caltrans-near-me/district-3/d3-projects/d3-us-50-camino-safety-4e620
Friendship, MD Anne Arundel Co. United States	Solomons Island Rd. (MD 2) / Friendship Rd. (MD 261) / Sansbury Rd. (38.73656, -76.59379)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 40.0594	Other (At-Grade) Single-Lane	2008	ICD estimated from Google Maps linework.
Highland, IL Madison Co. United States	Iberg Rd. / Veterans Honor Pkwy. / Broadway / Saint Rose Rd. (38.73643, -89.65281)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2019	https://www.bnd.com/news/local/community/highland-news-leader/article137270003.html
Cottleville, MO St. Charles Co. United States	Gutermuth Rd. / MO 364 WB Ramps (38.73583, -90.66567)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Single-Lane	2020	https://www.stltoday.com/suburban-journals/stcharles/portion-of-gutermuth-to-close-for-route-364-interchange-construction/article_392e1870-c917-5df1-82ab-d83cceca50b8.html
Linton Hall, VA Prince William Co. United States	Braemar Pkwy. (VA 3080) / Iona Sound Dr. (VA 3089) (38.73510, -77.56889)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 46.5816	Other (At-Grade) Single-Lane	1999	Year Completed estimated (1994-2002). ICD estimated from Google Maps linework.
Cottleville, MO St. Charles Co. United States	Gutermuth Rd. / MO 364 EB Ramps (38.73394, -90.66626)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Single-Lane	2020	https://www.stltoday.com/suburban-journals/stcharles/portion-of-gutermuth-to-close-for-route-364-interchange-construction/article_392e1870-c917-5df1-82ab-d83cceca50b8.html
Jennings, MO St. Louis Co. United States	Wilson Bridge Dr. / Alexandria Place Dr. (38.73354, -90.24449)	Other Existing	Uncontrolled Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Alcabideche, Lisbon Cascais Portugal	N9 / A16 (Rota do Património da Humanidade) NB Ramps (38.73119, -9.41452)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)
Lewes, DE Sussex Co. United States	Grove Estate Rd. (38.72983, -75.15914)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Brentsville, VA Prince William Co. United States	Twin Leaf Dr. / Spring Iris Dr. (38.72948, -77.55567)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2020	Year Completed estimated (2019-2020).
Alcabideche, Lisbon Cascais Portugal	Rotunda das Palmeiras [Terceira Circular / Rota do Património da Humanidade / Avenida de Alcabideche] (38.72895, -9.41449)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Alcabideche, Lisbon Cascais Portugal	Rotunda José Roquete [Avenida de Alcabideche / Rua de Cascais] (38.72888, -9.41113)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Queijas, Lisbon Oeiras Portugal	N6-2 (Estrada da Amadora - Avenida de Portugal) / Rua da Mina Grande (38.72830, -9.24809)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Bristow, VA Prince William Co. United States	Iron Brigade Unit Ave. / Tenth Alabama Way (38.72790, -77.54408)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 38.2008	Other (At-Grade) Single-Lane	2006	Functional Class: Local ICD estimated from Google Maps linework.
Cirby Side, CA Placer Co. United States	Somer Ridge Dr. / (parking) (38.72754, -121.28342)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	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.
Bridgeville, DE Sussex Co. United States	Heritage Shores Cir. / Champions Dr. (38.72458, -75.60463)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Security-Widefield, CO El Paso Co. United States	Fountain Mesa Rd. / Caballero Ave. / Fortman Ave. (38.72330, -104.69956)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 33.5280	Other (At-Grade) Single-Lane	2022	Year Completed estimated (2021-2022). https://www.koaa.com/news/covering-colorado/new-roundabout-but-is-it-keeping-children-safe
Rehoboth Beach, DE Sussex Co. United States	Liverpool Ln. / Oxford Ct. / Limerick Dr. / Worcester Dr. (38.72326, -75.09795)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 45.7200	Other (At-Grade) Single-Lane	2006	Year Completed estimated (2005-2006).
St. Louis, MO St. Louis Co. United States	Halls Ferry / MO 367 (38.72251, -90.24017)	Rotary Existing	All-Way Yield None	6 Approaches 0 Driveways 86.6571	Other (At-Grade) Multilane (2 Lane, unspecified)		three of the six approaches are multilane and have dual lanes of traffic merging into both lanes of the roundabout; roundabout is unstriped. Description as follows: Halls Ferry Circle is 3 lanes wide, 350 foot diameter, 35 miles per hour and has 5 major roadways entering (from http://www.ballwin.mo.us/minutes_062402.html) ICD estimated from Google Maps linework.
Dunkirk, MD Calvert Co. United States	Ward Rd. / (entrance to park) (38.72220, -76.64529)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2021	https://southernmarylandchronicle.com/2021/07/02/section-of-ward-road-in-calvert-to-close-for-construction/
Rehoboth Beach, DE Sussex Co. United States	Warrington Rd. / Healthy Way (38.72141, -75.14094)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2021	Year Completed estimated (2019-2021). https://deldot.gov/Programs/roundabouts/images/warrington.jpg.
Samouco, Setúbal Alcochete Portugal	M501 / Rua do Oceano / Rua da Quinta da Praia (38.72128, -9.00093)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Praia da Vitória, Terceira Island Portugal	Estrada da Circunvalação (Rte 1A) / Via Vitorino Nemesio (38.71992, -27.06340)	Roundabout Existing	All-Way Yield None	4 Approaches 1 Driveways 44.7279	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
São Domingos de Rana, Lisbon Cascais Portugal	Rua dos Canteiros / Avenida Salgueiro Maia / Avenida Amália Rodrigues (38.71855, -9.34707)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Owings, MD Calvert Co. United States	Good Shepherd Way / Megatha Ln. (38.71846, -76.62480)	Other Existing	Uncontrolled Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
O'Fallon, MO St. Charles Co. United States	Technology Dr. / Waterbury Falls Dr. (38.71843, -90.69627)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2003	Year Completed estimated (2002-2003). Southwest leg added 2008-2009.
Briatico, Calabria Vibo Valentia Italy	SP6 / SP80 (38.71758, 16.04923)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Linda-a-Velha, Lisbon Oeiras Portugal	Avenida 25 de Abril de 1974 / Alameda António Sérgio / Rua Alexandre Herculano (38.71706, -9.23763)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
O'Fallon, MO St. Charles Co. United States	Technology Dr. / Progress Point Pkwy. / (parking) (38.71685, -90.69499)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2003	Year Completed estimated (2002-2003).
Bridgeville, DE Sussex Co. United States	Heritage Shores Cir. / White Pelican Ct. / Will's Island Dr. (38.71647, -75.60235)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Linda-a-Velha, Lisbon Oeiras Portugal	Alameda António Sérgio / Avenida Carolina Michaelis (38.71625, -9.23698)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)