Roundabouts Database

29465 Results

Search by location, intersection, and comments with the Quick Search below. You can search all other attributes by clicking Advanced Search. Sort results by clicking the headers of any column. Click the Intersection name for a details and aerial view. Search results pages can be bookmarked. Results can be exported to KML for viewing in Google Earth.


Search Advanced Search Export as KML
City, State
County
Country 		Intersection
(Lat, Lng) 		Type
Status 		Control Type / Other Control Type Approaches / Driveways / ICD (m) Functional Class /
LaneType 		Year Completed Comments
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).
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.
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
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)
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)
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).
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
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)
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
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