Roundabouts Database

30321 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
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
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 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
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
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.
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
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
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.
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.
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 		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).
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.
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.
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.
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 		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
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.
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)
Manassas, VA
Manassas City
United States 		Grant Ave. / Byrd Dr. / Bartow St.
(38.74491, -77.47362) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2024 Elliptical shaped. https://www.potomaclocal.com/2024/07/02/new-roundabout-opens-on-grant-avenue-as-part-of-road-diet/
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
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 		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)
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.
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.
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
Lewes, DE
Sussex Co.
United States 		Beaver Dam Rd. / Plantation Rd. / Salt Marsh Rd.
(38.74622, -75.17584) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Multilane (2 Lane, 2x2 max) 		2024 https://www.wrde.com/news/roundabout-near-five-points-in-lewes-delays-opening-to-traffic/article_f4d5a7a8-f5e5-11ee-9c1c-47fda0d30d3e.html. Project map here: https://deldot.gov/public.ejs?command=PublicProjectPortalDocument&iDID=2008254&iProjectObjectID=54771
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
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 		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).
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.
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.
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
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.
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)
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.
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 		Senators Dr. / Roth Dr.
(38.75454, -75.13536) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown
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 		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.
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
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
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.
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
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)
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.
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)
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
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)
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)
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.
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 		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.
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)
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)
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)
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).
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.
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
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)
Lake St Louis, MO
St. Charles Co.
United States 		Breton Pkwy. / Welsh Dr.
(38.76444, -90.79387) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
35.0520 		Other (At-Grade)
Single-Lane 		2007 Year Completed estimated (2005-2007).
Lake St Louis, MO
St. Charles Co.
United States 		Ridgeway Dr. / Breton Pkwy.
(38.76456, -90.79000) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
35.0520 		Other (At-Grade)
Single-Lane 		2005
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
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.