Roundabouts Database Index

29465 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
Southaven, MS De Soto Co. United States	Bending Cherry Ln. / S Cherry Cove / S Cherry Dr. (34.90660, -89.94100)	Other Existing	Uncontrolled Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
O'Fallon, IL St. Clair Co. United States	Milburn School Rd. / Merriam Pkwy. / Milburn Estates Dr. (38.61429, -89.94506)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 25.1966	Other (At-Grade) Single-Lane	2012	ICD estimated from Google Maps linework.
O'Fallon, IL St. Clair Co. United States	Milburn Estates Dr. / Portsmith Place Dr. (38.61138, -89.94514)	Other Existing	Uncontrolled None	3 Approaches 0 Driveways 55.9947	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
O'Fallon, IL St. Clair Co. United States	Milburn School Rd. / Old Collinsville Rd. (38.61444, -89.96636)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 31.7290	Other (At-Grade) Single-Lane	2018	ICD estimated from Google Maps linework.
Senatobia, MS Tate Co. United States	West St. / Thompson St. (34.62211, -89.97041)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 35.0520	Other (At-Grade) Single-Lane	2010	Year Completed estimated (2007-2010).
Fairview Heights, IL St. Clair Co. United States	Dunhill Dr. / Northshore Dr. (38.61012, -89.97116)	Other Existing	All-Way Yield None	4 Approaches 0 Driveways 31.7309	Other (At-Grade) Single-Lane	2006	No splitter islands. ICD estimated from Google Maps linework.
English Turn, LA Orleans Par. United States	LA-406 / LA-407 (29.90392, -89.97866)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 42.4481	Other (At-Grade) Single-Lane	2010	ICD estimated from Google Maps linework.
Belleville, IL St. Clair Co. United States	SR 159 (N Illinois St. - S Illinois St.) / E Main St. / W Main St. (38.51360, -89.98421)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 47.2440	Other (At-Grade) Single-Lane		Painted splitter islands. Circle with roundabout features.
Caseyville, IL St. Clair Co. United States	George E Chance Pkwy. / (future road) / (parking) (38.64435, -89.98704)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2007	Year Completed estimated (2007-2008).
Caseyville, IL St. Clair Co. United States	George E Chance Pkwy. / Blackwood Ridge / Boreal Ridge (38.64452, -89.99106)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2007	Year Completed estimated (2007-2008).
Edwardsville, IL Madison Co. United States	N University Dr. / Hairpin Dr. (38.79313, -89.99441)	Other Existing	Unknown Unknown	3 Approaches 5 Driveways 0.0000	Other (At-Grade) Unknown
Edwardsville, IL Madison Co. United States	(access road) / (parking) (38.79590, -89.99837)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2019	Year Completed estimated (2018-2019).
Belleville, IL St. Clair Co. United States	Centreville Ave. / SR 15 NB Ramps / S Belt W (38.50591, -90.00011)	Roundabout Existing	All-Way Yield Unknown	5 Approaches 0 Driveways 47.6653	Freeway Ramps (Grade-Separated) Single-Lane	2013	ICD estimated from Google Maps linework.
Belleville, IL St. Clair Co. United States	Centreville Ave. / SR 15 SB Ramps / Whiskey Dr. (38.50516, -90.00173)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 35.5157	Freeway Ramps (Grade-Separated) Single-Lane	2013	ICD estimated from Google Maps linework.
Caseyville, IL St. Clair Co. United States	George E Chance Pkwy. / Villa Valley / Donner Ridge (38.64193, -90.00523)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2007	Year Completed estimated (2007-2008).
Caseyville, IL St. Clair Co. United States	George E Chance Pkwy. / Laurel Flats Dr. / (future roads) (38.63746, -90.00941)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2007	Year Completed estimated (2007-2008).
Ridgeway, WI Iowa Co. United States	CR BB / Prairie Rd. / Ridgevue Rd. (42.98142, -90.01018)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 45.7200	Other (At-Grade) Single-Lane	2016	Year Completed estimated (2013-2019).
Abita Springs, LA St. Tammany Par. United States	LA 59 / LA 36 (30.47826, -90.03768)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 28.8204	Other (At-Grade) Single-Lane	2007	https://www.nola.com/news/traffic/article_6d2b5475-b7f9-5429-a8f7-2127046c5508.html ICD estimated from Google Maps linework.
Mandeville, LA St. Tammany Par. United States	LA-59 / Sharp Rd. / Pineview Rd. (30.39668, -90.04326)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 39.1461	Other (At-Grade) Multilane (2 Lane, unspecified)	2019	Video with aerial view here: https://wgno.com/2019/05/24/new-hwy-59-roundabout-in-mandeville-opening-to-traffic/ ICD estimated from Google Maps linework.
New Orleans, LA Orleans Par. United States	Nunez St. (LA 428) / Mardi Gras Blvd. (29.93808, -90.05040)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.0139	Other (At-Grade) Single-Lane	2013	ICD estimated from Google Maps linework.
Mauston, WI Juneau Co. United States	STH 82 (Gateway Ave.) / I-90-I-94 WB Ramps (43.79635, -90.05521)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Single-Lane	2022	Raindrop shaped. https://www.mauston.com/vertical/Sites/%7BF7711255-419A-434B-BDA9-D1E7B277079F%7D/uploads/221216_I-90-94_and_WIS_82_Winter_Shutdown.pdf
Memphis, TN Shelby Co. United States	Island Dr. / Auction Ave. (35.15935, -90.05602)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 42.9628	Other (At-Grade) Multilane (2 Lane, unspecified)	2006	ICD estimated from Google Maps linework.
Kennett, MO Dunklin Co. United States	US 412 / CR VV / Kennett St. (36.22581, -90.05759)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 59.4360	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2016	Add-lane right-turn bypass lane on south leg.
Mauston, WI Juneau Co. United States	STH 82 (Gateway Ave.) / I-90-I-94 EB Ramps (43.79649, -90.05800)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Single-Lane	2022	Raindrop shaped. https://www.mauston.com/vertical/Sites/%7BF7711255-419A-434B-BDA9-D1E7B277079F%7D/uploads/221216_I-90-94_and_WIS_82_Winter_Shutdown.pdf
New Orleans, LA Orleans Par. United States	Lakeshore Dr. / Elysian Fields Ave. (30.03055, -90.06176)	Rotary Existing	All-Way Yield None	4 Approaches 0 Driveways 78.5840	Other (At-Grade) Multilane (2 Lane, unspecified)		ICD estimated from Google Maps linework.
Pearl, MS Rankin Co. United States	MS 475 (Airport Rd.) / Old Brandon Rd. (32.29057, -90.07133)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 34.3273	Other (At-Grade) Single-Lane	1997	Use of paint to achieve (?) deflection. ICD estimated from Google Maps linework.
New Orleans, LA Orleans Par. United States	Lee Circle (St. Charles Ave. / Andrew Higgins Dr.) (29.94333, -90.07247)	Signalized Roundabout/Circle Existing	Other None	4 Approaches 0 Driveways 99.3513	Other (At-Grade) Unknown		Two tram lines run along the circulatory roadway. Some entry-circulating points are fully signalized; others are yield-controlled. ICD estimated from Google Maps linework.
Mauston, WI Juneau Co. United States	Division St. / Grayside St. (43.78910, -90.07675)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 43.1088	Other (At-Grade) Single-Lane	2014	ICD estimated from Google Maps linework.
New Orleans, LA Orleans Par. United States	Lakeshore Dr. / Paris Ave. / Oriole St. (30.02664, -90.07915)	Rotary Existing	All-Way Yield None	4 Approaches 0 Driveways 136.4934	Other (At-Grade) Multilane (2 Lane, unspecified)		ICD estimated from Google Maps linework.
Covington, LA St. Tammany Par. United States	Greengate Dr. / Village Ln. (30.44635, -90.08554)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
New Orleans, LA Orleans Par. United States	Harrison Ave. / Diagonal Dr. (30.00165, -90.09264)	Other Existing	All-Way Yield Other	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (2 Lane, unspecified)		Painted splitter islands.
New Orleans, LA Orleans Par. United States	1 Collins Diboll Circle (29.98645, -90.09329)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 106.5494	Other (At-Grade) Single-Lane		Building in center of circle with on-street parking on circulatory roadway. ICD estimated from Google Maps linework.
Centreville, IL St. Clair Co. United States	SR 13 / SR 157 (38.55853, -90.09956)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 44.1960	Other (At-Grade) Single-Lane	2008
Dodgeville, WI Iowa Co. United States	US 18 / Bennett Rd. (42.96960, -90.11338)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 43.6954	Other (At-Grade) Multilane (2 Lane, unspecified)	2008	Opened October 7, 2008. ICD estimated from Google Maps linework.
Covington, LA St. Tammany Par. United States	River Chase Dr. / Continental Dr. (30.43874, -90.12867)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 41.1480	Other (At-Grade) Single-Lane	2014	Year Completed estimated (2013-2014). Southwest leg stubbed.
East St Louis, IL St. Clair Co. United States	N 18th St. / Baugh Ave. / I-64 WB Ramps (38.62540, -90.13455)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 28.9249	Freeway Ramps (Grade-Separated) Single-Lane	2010	ICD estimated from Google Maps linework.
East St Louis, IL St. Clair Co. United States	N 9th St. / Baugh Ave. / I-70 EB Onramp (38.63197, -90.14187)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 33.5871	Freeway Ramps (Grade-Separated) Single-Lane	2012	ICD estimated from Google Maps linework.
East St Louis, IL St. Clair Co. United States	N 9th St. / St Clair Ave. (38.63094, -90.14386)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 37.3196	Other (At-Grade) Single-Lane	2013	Right-turn bypass lane on east leg. ICD estimated from Google Maps linework.
Ridgeland, MS Madison Co. United States	Old Agency Rd / Highland Colony Pkwy (32.43125, -90.14893)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 47.3786	Other (At-Grade) Multilane (2 Lane, unspecified)	2004	Planned in association with interchange improvements at I-55/Old Agency Rd. Functional Class: Collector ICD estimated from Google Maps linework.
Covington, LA St. Tammany Par. United States	LA-1085 / Ochsner Blvd. / Francis Rd. (30.46681, -90.15044)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 29.8532	Other (At-Grade) Single-Lane	2014	Year Completed estimated (2013-2014). ICD estimated from Google Maps linework.
Covington, LA St. Tammany Par. United States	Ochsner Blvd. / S Ochsner Blvd. (30.45565, -90.15060)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 48.7680	Other (At-Grade) Single-Lane	2012	Year Completed estimated (2011-2012). South leg added 2019-2022.
Metairie Terrace, LA Jefferson Par. United States	Causeway Blvd. (LA 3046) / US 61 (Airline Hwy.) (29.97476, -90.15636)	Rotary Existing	All-Way Yield None	4 Approaches 0 Driveways 107.5965	Other (At-Grade) Unknown		Single-point interchange using one circle. Entire circle is on causeway structure over railroad yards. ICD estimated from Google Maps linework.
Waterloo, IL Monroe Co. United States	Park St. / Lakeview Dr. (38.33225, -90.15966)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 2 Driveways 34.6640	Other (At-Grade) Single-Lane	2016	ICD estimated from Google Maps linework.
Alton, IL Madison Co. United States	Central Ave. / College Ave. (38.90689, -90.17172)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown		Parking along circulatory roadway.
Marshfield, WI Wood Co. United States	STH 13 / US 10 / CTH BB (44.62490, -90.18009)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 49.3017	Other (At-Grade) Multilane (2 Lane, unspecified)	2012	Opened November 2012. Free-flow right-turn bypass lane into added lane. ICD estimated from Google Maps linework.
Marshfield, WI Wood Co. United States	STH 13 / US 10 / Klondike Dr. (44.59813, -90.18018)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 47.6235	Other (At-Grade) Single-Lane	2012	Opened November 2012. Free-flow right-turn bypass lane with acceleration lane. ICD estimated from Google Maps linework.
Marshfield, WI Wood Co. United States	STH 13 / Heritage Dr. (44.62685, -90.18053)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 47.6000	Other (At-Grade) Multilane (2 Lane, unspecified)	2012	ICD estimated from Google Maps linework.
Covington, LA St. Tammany Par. United States	LA-1085 S / LA-1077 (30.46702, -90.18243)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 39.1179	Other (At-Grade) Multilane (2 Lane, unspecified)	2016	ICD estimated from Google Maps linework.
Jackson, MS Hinds Co. United States	E Capitol St. / West St. (32.29975, -90.18412)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 18.1714	Other (At-Grade) Single-lane w/ Traversable Central Island	2014	ICD estimated from Google Maps linework.
Jackson, MS Hinds Co. United States	E Capitol St. / Lamar St. (32.30000, -90.18602)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 14.1333	Other (At-Grade) Single-lane w/ Traversable Central Island	2014	ICD estimated from Google Maps linework.
Jackson, MS Hinds Co. United States	Capitol St. / Farish St. (32.30034, -90.18851)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 17.1618	Other (At-Grade) Single-lane w/ Traversable Central Island	2014	ICD estimated from Google Maps linework.
Piggott, AR Clay Co. United States	US 62 (W Jackson St. - N 3rd Ave.) / W Jackson St. / N 3rd Ave. (36.38486, -90.19158)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-lane w/ Traversable Central Island	2023	US 62 makes 90-degree bend through intersection. https://www.youtube.com/watch?v=73e6KoO9gPU (site 3 in video)
Piggott, AR Clay Co. United States	US 62 (Scurlock Ave. - W Jackson St.) / W Jackson St. (36.38569, -90.19424)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-lane w/ Traversable Central Island	2023	US 62 makes 90-degree bend through intersection. Previous control: one stop, one yield. https://www.youtube.com/watch?v=73e6KoO9gPU (site 2 in the video)
Piggott, AR Clay Co. United States	US 62 / W North St. / N 6th Ave. (36.38931, -90.19428)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-lane w/ Traversable Central Island	2023	US 62 makes 90-degree bend through intersection. https://www.youtube.com/watch?v=73e6KoO9gPU (site 1 in the video)
Hurley, WI Iron Co. United States	US 2 / US 51 (46.46644, -90.19438)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2021	Replaced trumpet interchange. https://twitter.com/WisDOTnorthcent/status/1443919877912162307
Jackson, MS Hinds Co. United States	Metro Pkwy. / Terry Rd. / Pearl St. / Pascagoula St. (32.29912, -90.19500)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 79.2480	Other (At-Grade) Multilane (2 Lane, unspecified)	2006
Jackson, MS Hinds Co. United States	Metro Pkwy. / Rose St. (32.30005, -90.20143)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 48.7680	Other (At-Grade) Multilane (2 Lane, unspecified)	2006	Elliptical shaped. ICD = 160 ft x 115 ft.
St. Louis, MO St. Louis City Co. United States	Gratiot St. / S 13th St. (38.62104, -90.20242)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 33.5923	Other (At-Grade) Single-Lane		No splitter islands. ICD estimated from Google Maps linework.
Jackson, MS Hinds Co. United States	Metro Pkwy. / Dalton St. (32.30095, -90.20563)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 38.3614	Other (At-Grade) Multilane (2 Lane, unspecified)	2004	Functional Class: Arterial ICD estimated from Google Maps linework.
Columbia, IL Monroe Co. United States	Quarry Rd. / Palmer Creek Dr. (38.46186, -90.21085)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 38.1000	Other (At-Grade) Single-Lane	2022	https://www.republictimes.net/another-roundabout-for-columbia/
Jackson, MS Hinds Co. United States	John R. Lynch St. / Prentiss St. (32.29755, -90.21119)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 34.3246	Other (At-Grade) Multilane (2 Lane, unspecified)	2004	ICD estimated from Google Maps linework.
Jackson, MS Hinds Co. United States	Metro Pkwy. / Prentiss St. (32.30098, -90.21120)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 51.4850	Other (At-Grade) Multilane (2 Lane, unspecified)	2004	Functional Class: Arterial ICD estimated from Google Maps linework.
Jackson, MS Hinds Co. United States	Central St. / Buena Vista Ave. (32.30306, -90.21358)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane	2005	Functional Class: Local
Jackson, MS Hinds Co. United States	John R. Lynch St. / Metro Pkwy. / Eastview St. (32.29798, -90.21458)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 45.4296	Other (At-Grade) Multilane (2 Lane, unspecified)	2004	Functional Class: Arterial ICD estimated from Google Maps linework.
Spanish Lake, MO St. Louis Co. United States	Dunn Rd. / I-270 WB Ramps (38.77088, -90.22381)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 51.8160	Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x1 max)	2020	Left-turn-only lane on east leg. Little deflection westbound.
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.
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
Ponchatoula, LA Tangipahoa Par. United States	Maison Lafitte Blvd. (30.43890, -90.24596)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
St. Louis, MO St. Louis City Co. United States	Tower Grove Ave. / I-64 EB Off-Ramp (38.63045, -90.25538)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 33.5879	Freeway Ramps (Grade-Separated) Single-Lane	2014	ICD estimated from Google Maps linework.
Camanche, IA Clinton Co. United States	US 67 / 7th Ave. (41.79727, -90.25775)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2023	https://www.youtube.com/watch?v=r8ajPBUZU6E
Saint Louis, MO St. Louis City United States	Center Cross Dr. / Main Dr. (38.60658, -90.25836)	Other Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Old Jamestown, MO St. Louis Co. United States	Behlmann Farms Blvd. / Delcastle Dr. / Behlmann Meadows Way (38.81834, -90.26599)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 35.0520	Other (At-Grade) Single-Lane	2004
St Louis, MO St. Louis City Co. United States	McKinley Dr. / Wells Dr. (38.63354, -90.28072)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 49.4467	Other (At-Grade) Single-Lane	2008	Converted from traffic circle in 2007-2008. Previous circle had on-street parking in circulatory roadway. ICD estimated from Google Maps linework.
Forest Park, MO St. Louis City Co. United States	Concourse Dr. / Washington Dr. (38.63495, -90.28480)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 23.3234	Other (At-Grade) Single-Lane	2009	ICD estimated from Google Maps linework.
Forest Park, MO St. Louis City Co. United States	Hampton Ave. / Concourse Dr. / Wells Dr. (38.63316, -90.28546)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 31.7207	Other (At-Grade) Single-Lane	2009	Right-turn bypass lane merge in crosswalk area. ICD estimated from Google Maps linework.
Florissant, MO St. Louis Co. United States	Vaile Ave. / Old Halls Ferry Rd. (38.83294, -90.29315)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 34.4231	Other (At-Grade) Single-Lane	2015	ICD estimated from Google Maps linework.
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
Forest Park, MO St. Louis City Co. United States	Government Dr. / Wells Dr. (38.63437, -90.30113)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 44.7814	Other (At-Grade) Single-Lane	2016	ICD estimated from Google Maps linework.
University City, MO St. Louis Co. United States	Delmar Blvd. / Trinity Ave. (38.65653, -90.31072)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 31.7103	Other (At-Grade) Single-Lane	2015	Installed as temporary roundabout ~2013. Made permanent 2015. ICD estimated from Google Maps linework.
Fredericktown, MO Madison Co. United States	W Main St. / MO-72 / Commercial Dr. / Sinek Dr. (37.56046, -90.31618)	Roundabout Existing	All-Way Yield None	5 Approaches 0 Driveways 41.6573	Other (At-Grade) Single-Lane	2008	ICD estimated from Google Maps linework.
Crystal Springs, MS Copiah Co. United States	MS 27 / Lee Ave. (31.99541, -90.32108)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 52.6707	Other (At-Grade) Single-Lane	2016	ICD estimated from Google Maps linework.
Medford, WI Taylor Co. United States	STH 13 / Ann's Way (45.15473, -90.33393)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 53.9030	Other (At-Grade) Multilane (2 Lane, unspecified)	2011	Opened October 2011. ICD estimated from Google Maps linework.
Medford, WI Taylor Co. United States	STH 13 / Allman St. (45.14894, -90.33466)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 48.8545	Other (At-Grade) Multilane (2 Lane, unspecified)	2011	Opened October 2011. ICD estimated from Google Maps linework.
Hazelwood, MO St. Louis Co. United States	Dunn Rd. / Sieloff Dr. / I-270 WB Entrance Ramp (38.77626, -90.33959)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 45.7200	Freeway Ramps (Grade-Separated) Single-Lane	2023	Left-turn-only lane on east leg. Little deflection westbound.
Concord, MO St. Louis Co. United States	Richmond Cavalry Dr. / Vicksburg Siege Ct. (38.54358, -90.35063)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2014
Clinton, MS Hinds Co. United States	Bruenburg Pkwy. / Cowles Creek Rd. / Bellemeade Trace (32.33733, -90.35144)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Marmaduke, AR Greene Co. United States	US 49 (S 3rd St.) / SR 34 (36.18693, -90.38488)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-lane w/ Traversable Central Island	2023	Year Completed estimated (2022-2023). November 2022: https://www.youtube.com/watch?v=LurUNtZaU7w May 2023: https://www.youtube.com/watch?v=Kmntt4a_kvI
Le Claire, IA Scott Co. United States	Wisconsin St. / 35th St. SW / (parking) (41.59770, -90.39139)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 45.7200	Other (At-Grade) Single-Lane	2022	Replaced offset T intersections. https://www.leclaireiowa.gov/340/Wisconsin-Street-and-35th-Street-Reconst
Barnhart, MO Jefferson Co. United States	Metropolitan Blvd. / Marriott Ln. / (unknown) / I-55 SB On-ramp (38.34633, -90.39727)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 35.5939	Freeway Ramps (Grade-Separated) Single-Lane	2010	Year Completed estimated (2010-2011). ICD estimated from Google Maps linework.
Arnold, MO Jefferson Co. United States	Astra Way / Missouri State Rd. (38.44301, -90.40168)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 41.1589	Other (At-Grade) Single-Lane	2012	Located approximately 220 feet from traffic signal. https://patch.com/missouri/fenton-highridge/new-traffic-roundabout-to-be-built-on-hwy-141-between4fb74fd68b . ICD estimated from Google Maps linework.
Herculaneum, MO Jefferson Co. United States	McNutt St. / Providence Way (38.25522, -90.40498)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 76.2000	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2019	Ellipitcal shaped. ICD = 250 ft x 230 ft. Year Completed estimated (2018-2020).
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.
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.