Roundabouts Database Index

30012 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
Luray, VA Page Co. United States	W Main St. / Northcott Dr. (38.66285, -78.47863)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2022	https://www.virginiadot.org/projects/staunton/page_county_8211_route_211-340,_west_main_street,_northcott_drive_8211_roundabout_and_intersection_improvements.asp
Trafaria, Setúbal Almada Portugal	Avenida Torrado Da Silva / Estrada IC20 Acessos (38.66354, -9.19104)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
St Louis, MO St. Louis City United States	SR 115 (Natural Bridge Ave.) / Vandeventer Ave. (38.66375, -90.22271)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 32.0040	Other (At-Grade) Single-Lane	2020	https://nextstl.com/2022/03/crashes-down-on-natural-bridge-but-more-work-still-to-be-done/
Almendralejo, Estremadura Badajoz Spain	N-630 / EX-359 / E-803 SB On-Ramp (38.66395, -6.38084)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)		Concentric circulatory roadway striping.
Chesterfield, MO St. Louis Co. United States	Faust Park / (parking) (38.66416, -90.54198)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Lavradio, Setúbal Barreiro Portugal	Avenida das Nacionalizações / Rua dos Resistentes Antifascistas / Rua Doutor Miguel Bombarda (38.66506, -9.05575)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Barreiro, Setúbal Barreiro Portugal	Avenida das Nacionalizações / Rua do Industrial Alfredo da Silva / Rua da Indústria (38.66715, -9.05662)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Woodland, CA Yolo Co. United States	Gum Ave. / Bourn Dr. (38.66820, -121.74710)	Roundabout Removed	All-Way Yield None	4 Approaches 0 Driveways 64.3428	Other (At-Grade) Single-Lane	2008	Built as temporary in 2002. Temporary removed in 2008 and converted to AWSC. Previously controlled by two-way stop Functional Class: Collector ICD estimated from Google Maps linework.
Trafaria, Setúbal Almada Portugal	Estrada EN377-1 / Caminho da Raposeira / Rua Primeiro de Maio (38.66967, -9.23341)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Almendralejo, Estremadura Badajoz Spain	N-630 (38.67082, -6.38770)	Roundabout Existing	All-Way Yield Unknown	2 Approaches 2 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)		Concentric circulatory roadway striping.
Lavradio, Setúbal Barreiro Portugal	Avenida das Nacionalizações / Rua Dom José Cárcomo Lobo / Rua do Quinto Terceiro (38.67105, -9.05191)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Fountain, CO El Paso Co. United States	Santa Fe Ave. / S Charter Oak Ranch Rd. (38.67148, -104.71481)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 48.7680	Other (At-Grade) Single-Lane	2023	Painted splitter island on west leg. https://www.codot.gov/news/2023/may/mamsip-charter-oak-ranch-road-completed
Georgetown, DE Sussex Co. United States	S Bedford St. / Arrow Safety Rd. (38.67394, -75.37738)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2023	There's a short video of a truck going around this roundabout posted on Sept 1 at https://www.facebook.com/delawaredot/ This roundabout currently has three legs, but a fourth will be added some time in the future.
Chesterfield, MO St. Louis Co. United States	N Outer 40 Rd. / I-64 WB Exit Ramp (38.67582, -90.65115)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 42.6720	Freeway Ramps (Grade-Separated) Single-Lane	2010	Year Completed estimated (2009-2010).
Almendralejo, Estremadura Badajoz Spain	N-630 / Calle Ortega y Muñoz / Calle las Encinas (38.67584, -6.39247)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 1 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
North Highlands, CA Sacramento Co. United States	Freedom Park Dr. / 34th St. / Dudley Blvd. (38.67588, -121.38752)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2012
North Highlands, CA Sacramento Co. United States	Freedom Park Dr. / 32nd St. (38.67592, -121.39216)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2012
Piedade, Setúbal Almada Portugal	Avenida Dom Nuno Álvares Pereira / Avenida Bento Gonçalves / Rua Direita / Rua Caetano Maria Batalha (38.67617, -9.16488)	Roundabout Existing	All-Way Yield At-grade Rail Crossing Signals/Gates (controlling circulatory roadway only)	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)		Pedestrian signals and signals for light rail crossing through central island.
Sacramento, CA Sacramento Co. United States	Crossfield Dr. / Meister Way / Airport Blvd. NB Ramps (38.67890, -121.58937)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 51.8160	Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x1 max)	2023	Serves Sacramento International Airport. https://sacramento.aero/scas/about/news-and-events/upcoming-smf-construction-plan-ahead-for-improved-travel-experience
Sacramento, CA Sacramento Co. United States	Crossfield Dr. / Lindbergh Dr. / Airport Blvd. SB Ramps (38.67892, -121.59240)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 48.7680	Freeway Ramps (Grade-Separated) Single-Lane	2023	Serves Sacramento International Airport. https://sacramento.aero/scas/about/news-and-events/upcoming-smf-construction-plan-ahead-for-improved-travel-experience
Madison, CA Yolo Co. United States	SR 16 / CR 89 (38.68204, -121.96678)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane	2019
Sacramento, CA Sacramento Co. United States	Northborough Dr. / Heritage Park Ln. / Rose Arbor Dr. (38.68221, -121.51550)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 23.3081	Other (At-Grade) Single-Lane	2002	ICD estimated from Google Maps linework.
Almendralejo, Estremadura Badajoz Spain	N-630 / Calle de Santa Marta (38.68229, -6.39858)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Woodbridge, VA Prince William Co. United States	Greatbridge Rd. / Mays Quarter Rd. (38.68304, -77.34802)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 44.7509	Other (At-Grade) Single-Lane	1998	Year Completed estimated (1994-2002). ICD estimated from Google Maps linework.
Citrus Heights, CA Sacramento Co. United States	Stock Ranch Rd. / Woodside Dr. / Fountain Square Dr. (38.68438, -121.29649)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 38.1000	Other (At-Grade) Single-Lane	2004	Bike lanes striped within circulatory roadway. Year Completed estimated (2003-2004).
Woodbridge, VA Prince William Co. United States	Mays Quarter Rd. / Dorset Dr. / Weejun Loop (38.68551, -77.34407)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.3589	Other (At-Grade) Single-Lane	2014	ICD estimated from Google Maps linework.
Warrenton, VA Fauquier Co. United States	US 17 Business / Lord Fairfax Dr. / US 15-US 17-US 29 (Eastern Bypass) NB Ramps (38.68557, -77.78602)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Single-Lane	2020	http://www.virginiadot.org/projects/culpeper/warrentoninterchange.asp
Chesterfield, MO St. Louis Co. United States	River Valley Dr. / River Bend Dr. (38.68602, -90.50327)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 33.5280	Other (At-Grade) Single-Lane	2003	Year Completed estimated (2002-2003).
St Louis, MO St. Louis City United States	SR 115 (Natural Bridge Ave.) / Goodfellow Blvd. (38.68607, -90.27131)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2021	Add-lane right-turn bypass lane on southeast leg; yield-controlled right-turn bypass lane on northeast leg.
Woodland, CA Yolo Co. United States	Palm Ave. / Keystone Ave. (38.68635, -121.77050)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 41.0198	Other (At-Grade) Single-Lane		Circular intersection in older neighborhood. ICD estimated from Google Maps linework.
Jardia, Setúbal Montijo Portugal	N5 / N11-2 / Rua do Operário (38.68648, -8.94418)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Warrenton, VA Fauquier Co. United States	US 17 Business (James Madison Hwy.) / US 15-US 17-US 29 (Eastern Bypass) SB Ramps (38.68752, -77.78767)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Single-Lane	2020	http://www.virginiadot.org/projects/culpeper/warrentoninterchange.asp
St Louis, MO St. Louis Co. United States	Willow Village Pkwy. / Beckham Ridge Ct. / Willowbrooke Manors Ct. / Kennabrooke Ct. (38.68853, -90.41193)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2014	One-stage unmarked pedestrian crossings.
Almendralejo, Estremadura Badajoz Spain	Avenida de A Rúa / Camino Corona / Poligono Pabellon (38.68884, -6.41395)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Almendralejo, Estremadura Badajoz Spain	EX-300 (38.68926, -6.42754)	Roundabout Existing	All-Way Yield Unknown	2 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Federalsburg, MD Caroline Co. 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 (At-Grade) Single-Lane	1999	Rural, installed for safety reasons Previously controlled by two-way stop ICD estimated from Google Maps linework.
Georgetown, DE Sussex Co. United States	The Circle (Georgetown Circle) (38.69005, -75.38587)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 66.1876	Other (At-Grade) Single-Lane	1791	New town built as county seat centered on circle instead of more traditional square. Pedestrian access to center island. Parking at buildings on the circle. No raised splitter islands. ICD estimated from Google Maps linework.
Almendralejo, Estremadura Badajoz Spain	EX-300 / EX-359 (38.69145, -6.43905)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 1 Driveways	Other (At-Grade) Multilane (3+ Lane)		Concentric circulatory roadway striping.
Almendralejo, Estremadura Badajoz Spain	Carretera San Serván / (unknown) (38.69153, -6.40953)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Almendralejo, Estremadura Badajoz Spain	N-630 / Calle Gonzalo Hernandez / Calle Almendro (38.69168, -6.40553)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 2 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Woodbridge, VA Prince William Co. United States	Greatbridge Rd. / Chanceford Dr. (38.69295, -77.34576)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 28.8976	Other (At-Grade) Single-Lane	2003	ICD estimated from Google Maps linework.
Afonsoeiro, Setúbal Montijo Portugal	Estrada Nacional 5 / Circular Externa / Rua Vasco da Gama (38.69332, -8.95082)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Sacramento, CA Sacramento Co. United States	Airport Blvd. / Lindbergh Dr. / Aviation Dr. (38.69345, -121.59025)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2011	South leg is exit only.
Almendralejo, Estremadura Badajoz Spain	Calle Jarabugo / Calle Sup 37ii (38.69413, -6.43824)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Chesapeake Beach, MD Calvert Co. United States	Harrison Blvd. / Sansbury Dr. (38.69561, -76.55797)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 24.3840	Other (At-Grade) Single-Lane	1997	Year Completed estimated (1993-2004).
Almendralejo, Estremadura Badajoz Spain	Calle Sup 37ii (38.69575, -6.43608)	Roundabout Existing	All-Way Yield Unknown	2 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)		Concentric circulatory roadway striping.
Accokeek, MD Prince George's Co. United States	St Mary's View Rd. / Lusby Ridge Rd. (38.69721, -76.95157)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 27.4320	Other (At-Grade) Single-Lane		No splitter island on south leg.
Lewes, DE Sussex Co. United States	Beaver Dam Rd. / Quiet Harbor Way (38.69743, -75.21559)	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
Afonsoeiro, Setúbal Montijo Portugal	N4 (Circular Externa) / (Fórum Montijo shopping centre entrance) (38.69761, -8.94484)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
São Domingos de Rana, Lisbon Cascais Portugal	Avenida dos Bombeiros Voluntários / Rua do Dia Mundial da Criança (38.69795, -9.35301)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Warrenton, VA Fauquier Co. United States	E Shirley Ave. / Falmouth St. (38.69843, -77.78795)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 13.0496	Other (At-Grade) Single-lane w/ Traversable Central Island	2018	Constructed Fall 2018, mini-roundabout with one bypass lane ICD estimated from Google Maps linework.
Sedalia, MO Pettis Co. United States	Rte Y (W 16th St.) / Winchester Dr. (38.69957, -93.27763)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2011	Year Completed estimated (2010-2012).
Brandywine, MD Prince George's Co. United States	MD 373 / Accokeek Rd. / MD 5 (Branch Ave.) SB On-Ramp (38.70076, -76.87599)	Roundabout Existing	All-Way Yield None	2 Approaches 0 Driveways 39.6240	Freeway Ramps (Grade-Separated) Single-Lane	2019	MD 5 (Branch Ave.) was converted to limited access. https://www.thebaynet.com/articles/0419/newtrafficshiftstartsinbrandywineareathursday.html.
Georgetown, DE Sussex Co. United States	Sand Hill Rd. / Clark Dr. (38.70163, -75.36785)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2022	West leg is entrance to Cheer Community Center. East leg stubbed. https://www.wmdt.com/2022/08/georgetown-east-gateway-project-completed-ensuring-safer-roadways-for-locals/
Afonsoeiro, Setúbal Montijo Portugal	N4 (Circular Externa) / Avenida das Portas da Cidade (38.70209, -8.94456)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Cascais, Lisbon Cascais Portugal	N9 (Avenida de Sintra) / Rua Henrique de Seixas (38.70356, -9.41787)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Normandy, MO St. Louis Co. United States	Natural Bridge Rd. (SR 115) / Florissant Rd. (38.70418, -90.29664)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 39.6240	Other (At-Grade) Single-Lane	2015
Weldon Spring, MO St. Charles Co. United States	Technology Dr. / Meadows Pkwy. / Wolfrum Rd. / I-64 WB Exit Ramp (38.70526, -90.67410)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 60.9600	Freeway Ramps (Grade-Separated) Single-Lane		Oval shaped. ICD = 200 ft x 180 ft. Built initially as 2x2 roundabout in 2005-2006. Concentric circulatory roadway striping. Converted to single lane using by striping out inner circulatory roadway lane and left entry lane on southwest leg 2020-2021.
Jardia, Setúbal Montijo Portugal	N4 (Avenida Dom Manuel) / Rua das Forças Armadas / Rua Infante Dom Francisco (38.70686, -8.92771)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Afonsoeiro, Setúbal Montijo Portugal	N4 (Circular Externa) / Avenida Garcia da Orta (38.70694, -8.94501)	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 / Old SR 13 / SE 101st Rd. (38.70853, -93.73029)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 41.0071	Other (At-Grade) Single-Lane	2011	Functional Class: Arterial ICD estimated from Google Maps linework.
Alcochete, Setúbal Alcochete Portugal	N4 / N118 (38.70905, -8.89566)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Rehoboth Beach, DE Sussex Co. United States	Coatue Blvd. / Wauwinet Ct. / Sconset Ct. (38.70921, -75.13040)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Rehoboth Beach, DE Sussex Co. United States	Wanoma Cir. / Coatue Blvd. (38.70922, -75.12642)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Linda-a-Velha, Lisbon Oeiras Portugal	Avenida dos Bombeiros Voluntários de Algés / Alameda Engenheiro José Mattos e Silva / A36 NB Ramp (38.70931, -9.22470)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)		Oval shaped.
Caxias, Lisbon Oeiras Portugal	Rua Calvet de Magalhães / Avenida António Sena da Silva / Rua do Penedo (38.71033, -9.28560)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Caxias, Lisbon Oeiras Portugal	Avenida das Seleções / Estrada Militar / A9 SB Ramps (38.71045, -9.26562)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)
Praia da Vitória, Terceira Island Portugal	Estrada da Circunvalação (Rte 2A) / Caminho dos Poços (38.71093, -27.06084)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 51.2571	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
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.
Bridgeville, DE Sussex Co. United States	Heritage Shore Dr. (38.71171, -75.59194)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Bridgeville, DE Sussex Co. United States	Heritage Shore Dr. / (future roads) (38.71236, -75.59344)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Afonsoeiro, Setúbal Montijo Portugal	Circular Externa / Rua Antero de Quental (38.71345, -8.94616)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Linda-a-Velha, Lisbon Oeiras Portugal	Avenida Maximiano Lemos / Alameda Fernão Lopes / Rua Quinta das Romeiras / Rua Afonso Praça / A36 SB Ramp (38.71369, -9.22492)	Roundabout Existing	All-Way Yield None	5 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)
Lewes, DE Sussex Co. United States	Cardiff Circle (38.71458, -75.17947)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Owings, MD Calvert Co. United States	Cross Point Dr. / Blue Sky Ct. / Bear Claw Ct. (38.71468, -76.61554)	Other Existing	Unknown Unknown	3 Approaches 4 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Rehoboth Beach, DE Sussex Co. United States	Rehoboth Ave. / Grove St. (38.71501, -75.09075)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 32.6163	Other (At-Grade) Multilane (2 Lane, unspecified)	2003	Yield-controlled right-turn bypass lane on SB approach. Fishhook pavement markings. Heavy bicycle and pedestrian traffic. Extensive queuing with beach-related surges. Functional Class: Arterial ICD estimated from Google Maps linework.
Owings, MD Calvert Co. United States	Cross Point Dr. / Paulyn Dr. (38.71532, -76.61335)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Cascais, Lisbon Cascais Portugal	Avenida Condes de Barcelona / A5 Ramps / Rua do Campo Santo (38.71537, -9.38870)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Weldon Spring, MO St. Charles Co. United States	Weldon Spring Rd. / Technology Dr. / Siedentop Rd. (38.71551, -90.68906)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2004	Painted splitter island on east leg. Year Completed estimated (2003-2004).
Lisbon, Lisbon Lisboa Portugal	Rua de São Jorge / Avenida de Álvares Cabral / Rua João Anastácio Rosa (38.71579, -9.15871)	Roundabout Existing	All-Way Yield None	2 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)		3rd street is one way out of roundabout
Afonsoeiro, Setúbal Montijo Portugal	Circular Externa / Rua das Naus (38.71601, -8.95715)	Roundabout Existing	All-Way Yield None	2 Approaches 2 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
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)
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.
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).
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)
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
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.
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
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
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.
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
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.
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/
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.
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).
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
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
(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.
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
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.