Roundabouts Database

29616 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
Hammond, LA
Tangipahoa Par.
United States 		S Airport Rd. / Old Covington Hwy.
(30.49397, -90.41505) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
36.0196 		Other (At-Grade)
Single-Lane 		2010 ICD estimated from Google Maps linework.
St Louis, MO
St. Louis Co.
United States 		S Forty Rd. / I-64-US 40 EB Ramps
(38.63496, -90.41724) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
48.5127 		Freeway Ramps (Grade-Separated)
Single-Lane 		2009 Frontage road connection replaced direct connection to S Spoede Rd. ICD estimated from Google Maps linework.
St Louis, MO
St. Louis Co.
United States 		N Forty Dr. / I-64-US 40 WB Ramps
(38.63631, -90.41822) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
50.3777 		Freeway Ramps (Grade-Separated)
Single-Lane 		2009 Frontage road connection replaced direct connection to S Spoede Rd. ICD estimated from Google Maps linework.
Herculaneum, MO
Jefferson Co.
United States 		Stone Water Dr.
(38.26044, -90.42469) 		Other
Existing 		Unknown
Unknown 		2 Approaches
1 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Smelser, WI
Grant Co.
United States 		STH 80 / STH 81 / Patch Rd.
(42.66746, -90.43566) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
51.8160 		Other (At-Grade)
Single-Lane 		2023
(unincorporated), MO
Jefferson Co.
United States 		13th St. / Winding Bluffs Dr.
(38.48406, -90.44573) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
31.7865 		Other (At-Grade)
Single-Lane 		2016 Year Completed estimated (2016-2017). ICD estimated from Google Maps linework.
Festus, MO
Jefferson Co.
United States 		Victoria Falls Dr. / Niagara Falls Ct.
(38.22449, -90.44699) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands on three legs.
Imperial, MO
Jefferson Co.
United States 		Amberleigh Pkwy. / Amber Meadows Dr. / Amber View Dr.
(38.40708, -90.44771) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown 		Pedestrian access to central island.
Bettendorf, IA
Scott Co.
United States 		Forest Grove Dr. / Competition Dr.
(41.59010, -90.45635) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown 		2023 https://forestgrovedrive.com/ (third one in the video)
Hammond, LA
Tangipahoa Par.
United States 		Veterans Ave. / I-12 WB Ramps
(30.47969, -90.45704) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
51.4642 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2016 ICD estimated from Google Maps linework.
Hammond, LA
Tangipahoa Par.
United States 		Veterans Ave. / I-12 EB Ramps
(30.47831, -90.45712) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
49.4063 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2016 ICD estimated from Google Maps linework.
Hammond, LA
Tangipahoa Par.
United States 		Veterans Ave. / W Club Deluxe Ave.
(30.47557, -90.45719) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
45.2904 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2015 ICD estimated from Google Maps linework.
Bettendorf, IA
Scott Co.
United States 		Forest Grove Dr. / Middle Rd.
(41.59010, -90.45966) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2023 https://www.ourquadcities.com/news/local-news/new-bettendorf-roundabout-opens-oct-18/ (video of partially complete roundabout here (it's the middle one) https://forestgrovedrive.com/ )
Bettendorf, IA
Scott Co.
United States 		Forest Grove Dr. / Championship Dr.
(41.59001, -90.46287) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown 		2023 https://forestgrovedrive.com/ (first one in the video)
Bettendorf, IA
Scott Co.
United States 		53rd Ave. / Middle Rd.
(41.57538, -90.46408) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
37.5252 		Other (At-Grade)
Single-Lane 		2002 Right turn bypass lanes striped within roundabout. Construction cost ~$865,000. Information from website: http://www.bettendorf.lib.ia.us/publicworks/roundabout.html ICD estimated from Google Maps linework.
Poplar Bluff, MO
Butler Co.
United States 		Highway PP / Township Line Rd.
(36.76733, -90.46486) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
47.2440 		Other (At-Grade)
Single-Lane 		2016 Year Completed estimated (2015-2016).
Platteville, WI
Grant Co.
United States 		N Water St. / E Madison St.
(42.74037, -90.46891) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
33.3320 		Other (At-Grade)
Single-Lane 		2012 ICD estimated from Google Maps linework.
St Charles, MO
St. Charles Co.
United States 		Tecumseh St. / N 3rd St.
(38.79739, -90.47611) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
32.0037 		Other (At-Grade)
Single-Lane 		2010 Merging right-turn bypass lane on east leg.
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.
Platteville, WI
Grant Co.
United States 		Chestnut St. / Markee Ave.
(42.72607, -90.48517) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
38.6039 		Other (At-Grade)
Single-Lane 		2010 ICD estimated from Google Maps linework.
St Charles, MO
St. Charles Co.
United States 		Charlestowne Village Dr. / Keelboat Cross Station
(38.82680, -90.49034) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
38.1000 		Other (At-Grade)
Single-Lane 		2006
Valley Park, MO
St. Louis Co.
United States 		Meramec St. / N Highway Dr.
(38.54078, -90.49276) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
32.6957 		Other (At-Grade)
Single-Lane 		2017 At-grade railroad crossing on east leg. ICD estimated from Google Maps linework.
Valley Park, MO
St. Louis Co.
United States 		Outer Rd. W / I-44 WB Ramp
(38.53947, -90.49870) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
38.3013 		Freeway Ramps (Grade-Separated)
Single-Lane 		2016 Year Completed estimated (2016-2017). ICD estimated from Google Maps linework.
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.
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 Charles, MO
St. Charles Co.
United States 		Boones Lick Rd. / N Outer Rd. / St Charles Ave.
(38.77702, -90.50897) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2007
Guatemala City, Guatemala
Guatemala
Guatemala 		Avenida La Reforma / 10A Avenida / Ruta 6
(14.61534, -90.51392) 		Unknown
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
 Other (At-Grade)
Multilane (2 Lane, unspecified)
Town and Country, MO
St. Louis Co.
United States 		MO 141 SB Ramps / Woods Mill Rd.
(38.63523, -90.51449) 		Roundabout
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
38.2503 		Other (At-Grade)
Single-Lane 		2002 Previously controlled by one-way stop ICD estimated from Google Maps linework.
Guatemala City, Guatemala
Guatemala
Guatemala 		Rotonda Plazuela España
(14.60136, -90.51891) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
 Other (At-Grade)
Multilane (3+ Lane)
Park Hills, MO
St. Francois Co.
United States 		Science St. / High St. / Rebel Dr.
(37.84763, -90.52203) 		Roundabout
Existing 		All-Way Yield
None 		5 Approaches
0 Driveways
38.1000 		Other (At-Grade)
Single-Lane 		2008 Year Completed estimated (2007-2008).
Guatemala City, Guatemala
Guatemala
Guatemala 		18 Calle / 15 Avenida
(14.57975, -90.52453) 		Other
Existing 		All-Way Stop
Unknown 		3 Approaches
0 Driveways
 Other (At-Grade)
Unknown
Bonne Terre, MO
St. Francois Co.
United States 		Old Orchard Rd. / US 67 NB Ramps
(37.91294, -90.53029) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
53.3400 		Freeway Ramps (Grade-Separated)
Single-Lane 		2008 Year Completed estimated (2007-2009).
Bonne Terre, MO
St. Francois Co.
United States 		Old Orchard Rd. / Raider Rd. / US 67 SB Ramps
(37.91037, -90.53216) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
47.2440 		Freeway Ramps (Grade-Separated)
Single-Lane 		2008 Elliptical shaped. ICD = 155 ft x 145 ft. Year Completed estimated (2007-2009).
Davenport, IA
Scott Co.
United States 		Jersey Ridge Rd. / E 67th St. (Veterans Memorial Pkwy.)
(41.58937, -90.53928) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
39.3036 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2018 ICD estimated from Google Maps linework.
Chesterfield, MO
St. Louis Co.
United States 		Nooning Tree Dr. / Brightfield Manor Dr.
(38.66192, -90.53998) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
33.5280 		Other (At-Grade)
Single-Lane 		2000 Year Completed estimated (1996-2002).
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
Chesterfield, MO
St. Louis Co.
United States 		Schoettler Valley Dr. / Highcroft Dr.
(38.64415, -90.55331) 		Other
Removed 		Unknown
Unknown 		4 Approaches
0 Driveways
17.7235 		Other (At-Grade)
Single-Lane 		1999 Temporary roundabout installed in Fall 1999. Removed September 25, 2000 due to negative public opinion. Intersection returned to AWSC. Functional Class: Local ICD estimated from Google Maps linework.
Guatemala City, Guatemala
Guatemala
Guatemala 		Anillo Periférico / (parking)
(14.62429, -90.55778) 		Other
Existing 		Other
Unknown 		2 Approaches
2 Driveways
 Other (At-Grade)
Multilane (2 Lane, 2x2 max) 		Circulating traffic yields to entering traffic.
Guatemala City, Guatemala
Guatemala
Guatemala 		Anillo Periférico / (unknown)
(14.62255, -90.56021) 		Other
Existing 		All-Way Stop
Unknown 		4 Approaches
0 Driveways
 Other (At-Grade)
Multilane (2 Lane, 2x2 max)
Guatemala City, Guatemala
Guatemala
Guatemala 		27 Avenida / (unknown)
(14.62179, -90.56131) 		Other
Existing 		Other
Unknown 		3 Approaches
0 Driveways
 Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		Circulating traffic yields to entering traffic on east leg.
Davenport, IA
Scott Co.
United States 		Leclaire St. / E 2nd St.
(41.52114, -90.56831) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
45.7200 		Other (At-Grade)
Single-Lane 		2024 Located underneath railroad bridge and connecting to lower deck of bridge over river. https://www.kwqc.com/video/2024/08/09/rock-island-arsenal-davenport-update-progress-government-bridge-traffic-circle/
St Peters, MO
St. Charles Co.
United States 		Jungermann Cir. / Wellness Dr.
(38.79591, -90.57980) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
42.6720 		Other (At-Grade)
Single-Lane 		2015 Year Completed estimated (2014-2015).
St Peters, MO
St. Charles Co.
United States 		Executive Centre Pkwy. / Jungermann Cir.
(38.79655, -90.58169) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
48.7680 		Other (At-Grade)
Multilane (2 Lane, 2x2 max) 		2015 Two circulating lanes throughout even though side street has only one entering lane. Year Completed estimated (2014-2015).
Mixco, Guatemala
Mixco
Guatemala 		(unknown)
(14.64746, -90.60516) 		Other
Existing 		Unknown
Unknown 		6 Approaches
0 Driveways
 Other (At-Grade)
Unknown 		Parking along circulatory roadway.
Mixco, Guatemala
Mixco
Guatemala 		(unknown)
(14.64871, -90.60538) 		Other
Existing 		Unknown
Unknown 		6 Approaches
0 Driveways
 Other (At-Grade)
Unknown 		Parking along circulatory roadway.
Wildwood, MO
St. Louis Co.
United States 		Old Fairway Dr. / Nantucket Island Dr.
(38.56696, -90.61728) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
16.8088 		Other (At-Grade)
Single-Lane 		2014 ICD estimated from Google Maps linework.
Wildwood, MO
St. Louis Co.
United States 		Old Fairway Dr. / Roaring Fork Dr. / (school access)
(38.56734, -90.61948) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
26.1469 		Other (At-Grade)
Single-Lane 		2005 ICD estimated from Google Maps linework.
Wildwood, MO
St. Louis Co.
United States 		Old Fairway Dr. / Elderberry Ln.
(38.57910, -90.61965) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
28.0099 		Other (At-Grade)
Single-Lane 		2004 ICD estimated from Google Maps linework.
Wildwood, MO
St. Louis Co.
United States 		Old Fairway Dr. / Waterside Dr.
(38.57311, -90.62062) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
30.8135 		Other (At-Grade)
Single-Lane 		2005 ICD estimated from Google Maps linework.
Wildwood, MO
St. Louis Co.
United States 		Manchester Rd. / Village Hills Pkwy. / Taylor Rd.
(38.57818, -90.62749) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
35.4797 		Other (At-Grade)
Single-Lane 		2003 Year Completed estimated (2002-2003). ICD estimated from Google Maps linework.
Wildwood, MO
St. Louis Co.
United States 		MO 109 / Pond Grover Loop Rd.
(38.59084, -90.64046) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
32.6729 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2014 Year Completed estimated (2014-2015). ICD estimated from Google Maps linework.
Wildwood, MO
St. Louis Co.
United States 		MO 109 / MO 100 WB Ramps / Windsor Meadow Blvd.
(38.58501, -90.64241) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
38.2771 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2014 ICD estimated from Google Maps linework.
Wildwood, MO
St. Louis Co.
United States 		MO 109 / MO 100 EB Ramps
(38.58348, -90.64292) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
50.2920 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2019 Year Completed estimated (2019-2020).
Wildwood, MO
St. Louis Co.
United States 		MO 109 / Main St.
(38.58163, -90.64350) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
50.2920 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2019 Year Completed estimated (2019-2020).
Jonesboro, AR
Craighead Co.
United States 		N Airport Rd. / Aggie Rd.
(35.84631, -90.65022) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
 Other (At-Grade)
Single-Lane 		2016
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).
Dubuque, IA
Dubuque Co.
United States 		Kerper Blvd. / Kerper Ct.
(42.51518, -90.65500) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2023 https://www.kwwl.com/video/kerper-boulevard-roundabout-now-open-in-dubuque/video_c96b5eb0-5305-5b6f-8b06-be51094e84b7.html
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
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
Jonesboro, AR
Craighead Co.
United States 		SR 163 (Harrisburg Rd.) / SR 158 (E Lawson Rd.)
(35.74871, -90.66603) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
56.3880 		Other (At-Grade)
Single-Lane 		2021 https://www.kait8.com/2021/06/22/new-roundabout-use-south-jonesboro/
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
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.
Lancaster, WI
Grant Co.
United States 		US 61-STH 35 / STH 81
(42.81577, -90.68369) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
45.7200 		Other (At-Grade)
Single-Lane 		2023
Dubuque, IA
Dubuque Co.
United States 		N Grandview Ave. / Delhi St. / Grace St.
(42.49682, -90.68791) 		Roundabout
Existing 		All-Way Yield
Unknown 		5 Approaches
0 Driveways
20.2537 		Other (At-Grade)
Single-Lane 		2016 ICD estimated from Google Maps linework.
Dubuque, IA
Dubuque Co.
United States 		N Grandview Ave. / University Ave.
(42.49832, -90.68817) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
29.9396 		Other (At-Grade)
Single-Lane 		2018 ICD estimated from Google Maps linework.
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).
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).
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.
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.
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.
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
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
Dubuque, IA
Dubuque Co.
United States 		US 52 (SW Arterial - Seippel Rd.) / Chesterfield Dr. / US 20 EB ramps
(42.47403, -90.75987) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
0.0000 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2020 https://www.telegraphherald.com/news/tri-state/article_25dde05e-920f-5330-8d6f-356d16812f2d.html
Houma, LA
Terrebonne Par.
United States 		Westside Blvd. / Enterprise Dr.
(29.60658, -90.76499) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
38.4206 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2016 http://www.providenceeng.com/projects/terrebonne-parish-roundabout ICD estimated from Google Maps linework.
Maurepas, LA
Livingston Par.
United States 		LA-16 / LA-22
(30.26014, -90.76844) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
29.9163 		Other (At-Grade)
Single-Lane 		2016 ICD estimated from Google Maps linework.
Lake St Louis, MO
St. Charles Co.
United States 		Lake Saint Louis Blvd. / Veteran's Memorial Pkwy. / I-70 EB Ramps
(38.80322, -90.77073) 		Roundabout
Existing 		All-Way Yield
None 		5 Approaches
0 Driveways
67.0560 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, 2x1 max) 		2022
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).
Sparta, WI
Monroe Co.
United States 		STH 16 / STH 71 / Hardwood Rd.
(43.94078, -90.78544) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
25.7996 		Other (At-Grade)
Single-Lane 		2014 ICD estimated from Google Maps linework.
Portland, WI
Monroe Co.
United States 		STH 27 / STH 33
(43.74201, -90.79387) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
 Other (At-Grade)
Single-Lane 		2016
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).
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).
Thibodaux, LA
Lafourche Par.
United States 		Ardoyne Rd. / Audubon Ave.
(29.78934, -90.80550) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		2019 On Nicholls State University campus. https://www.facebook.com/HoumaTimes/posts/check-it-out-the-new-roundabout-on-campus-is-open-enjoy-this-how-to-video-from-n/2529969010358873/
Wentzville, MO
St. Charles Co.
United States 		Prospect Rd. / Corporate Pkwy. / I-64 WB Exit Ramp
(38.79597, -90.81810) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
42.6720 		Freeway Ramps (Grade-Separated)
Single-Lane 		2008 Interchange replaced single at-grade intersection. Year Completed estimated (2008-2009).
Wentzville, MO
St. Charles Co.
United States 		Prospect Rd. / I-64 EB Exit Ramp
(38.79596, -90.82043) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
42.6717 		Freeway Ramps (Grade-Separated)
Single-Lane 		2008 Interchange replaced single at-grade intersection. Year Completed estimated (2008-2009).
Sparta, WI
Monroe Co.
United States 		S Black River St. (STH 27) / River Rd.
(43.93267, -90.82053) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
40.4248 		Other (At-Grade)
Single-Lane 		2018 ICD estimated from Google Maps linework.
Thibodaux, LA
Lafourche Par.
United States 		SR 20 (Canal Blvd.) / Jackson St. / Thompson Pl. / Gerald T Peltier Dr.
(29.78750, -90.82301) 		Roundabout
Existing 		All-Way Yield
Unknown 		5 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2024 https://houmatimes.com/news/city-of-thibodaux-announces-official-completion-of-canal-boulevard-roundabout/
Gilmore, MO
St. Charles Co.
United States 		Glengarry Ct. / Kellerton Pl.
(38.79542, -90.84653) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Gilmore, MO
St. Charles Co.
United States 		Village Glen Dr. / Glengarry Dr.
(38.79407, -90.84755) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Peosta, IA
Dubuque Co.
United States 		Peosta St / NICC Dr
(42.44531, -90.84966) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
103.1146 		Other (At-Grade)
Single-Lane 		2012 Entrance to Northeast Iowa Community College ICD estimated from Google Maps linework.
Port Vincent, LA
Livingston Par.
United States 		LA 16 (Petes Hwy.) / LA 447 (Walker South Rd.)
(30.35577, -90.84991) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
39.6240 		Other (At-Grade)
Single-Lane 		2022
Gilmore, MO
St. Charles Co.
United States 		Luetkenhaus Blvd. / Main Plaza Dr. / Wall St. / (parking)
(38.82013, -90.85000) 		Roundabout
Existing 		All-Way Yield
None 		5 Approaches
0 Driveways
39.6240 		Other (At-Grade)
Single-Lane 		2012 Year Completed estimated (2011-2012).
Port Vincent, LA
Ascension Par.
United States 		LA-28 / LA-431
(30.33152, -90.85329) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
29.8945 		Other (At-Grade)
Single-Lane 		2012 ICD estimated from Google Maps linework.
Gilmore, MO
St. Charles Co.
United States 		S Church St. / I-70 WB Ramps
(38.80639, -90.85441) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
50.2920 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2016 Year Completed estimated (2015-2016).
Walker, LA
Livingston Par.
United States 		Walker South Rd. / I-12 WB Ramps
(30.47242, -90.86272) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
42.2038 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2017 ICD estimated from Google Maps linework.
Walker, LA
Livingston Par.
United States 		Walker South Rd. / I-12 EB Ramps
(30.46773, -90.86314) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
43.2352 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2017 ICD estimated from Google Maps linework.
Wentzville, MO
St. Charles Co.
United States 		Wilmer Valley Dr. / Wilmer Ridge Dr.
(38.79278, -90.86444) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
50.2675 		Other (At-Grade)
Single-Lane 		2008 ICD estimated from Google Maps linework.
Viroqua, WI
Vernon Co.
United States 		US 14-US 61 / STH 27-STH 82 / CR T
(43.52202, -90.86531) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
51.8160 		Other (At-Grade)
Single-Lane 		2023 Elliptical shaped. ICD = 170 ft x 155 ft.
Gilmore, MO
St. Charles Co.
United States 		Pine Creek Dr. / Pine Creek Ct.
(38.83970, -90.86642) 		Other
Existing 		Uncontrolled
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown
Flint Hill, MO
St. Charles Co.
United States 		CR P / US 61 NB Ramps / Service Rd.
(38.85292, -90.86827) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
44.6445 		Freeway Ramps (Grade-Separated)
Single-Lane 		2018 Under construction (almost finished) Aug 2018 (streetview) ICD estimated from Google Maps linework.
Wentzville, MO
St. Charles Co.
United States 		Schroeder Creek Blvd. / William Dierberg Dr.
(38.82018, -90.86907) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
39.0819 		Other (At-Grade)
Single-Lane 		2016 Paving was done in late 2016, but fully completed in 2017 -- https://www.wentzvillemo.org/departments/public_works/schroeder_creek_boulevard_extension_project.php . ICD estimated from Google Maps linework.