| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| 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. | 
| 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/ | 
| St Louis,
                MO St. Louis City United States | SR 115 (Natural Bridge Ave. / Salisbury St.) / Natural Bridge Ave. / Parnell St. (38.65785, -90.20947) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.1480 | Other (At-Grade) Single-Lane | 2020 | Elliptical shaped. ICD = 135 ft x 110 ft. https://nextstl.com/2022/03/crashes-down-on-natural-bridge-but-more-work-still-to-be-done/ | 
| 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. | 
| 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. / 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. | 
| 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 | |
| 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 | 
| 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) | 
| 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 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) | 
| 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. | 
| 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 | 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. | 
| 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. | 
| 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. | 
| 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 / 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. | 
| 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. | |
| 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. | 
| 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. | |
| 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. | 
| 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. | 
| 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. | 
| 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. | 
| 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 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. | 
| 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. | 
| 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. | 
| Lake Cormorant,
                MS De Soto Co. United States | SR 301 / Star Landing Rd. (34.90410, -90.10037) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Single-Lane | 2023 | https://mdot.ms.gov/portal/news_release_view/1575 | 
| 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 | |
| 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. | |
| 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. | |
| 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 | 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. | |
| 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 | 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. | |
| 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. | 
| Memphis,
                TN Shelby Co. United States | US 70 (W Eh Crump Blvd.) / Riverside Dr / I-55 Ramps / W Alston Ave. (35.12483, -90.06723) | Roundabout Existing | All-Way Yield At-grade Rail Crossing Signals/Gates (controlling approach only) | 5 Approaches 0 Driveways 73.1520 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max) | 2025 | Replaced three-quadrant cloverleaf interchange. At-grade rail crossing 430 ft to the east. https://www.youtube.com/watch?v=7DjkNBuVjlo | 
| 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. | |
| 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 | 
| 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. | 
| 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. | 
| 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 | 
| 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. | 
| 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. | 
| 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. | 
| 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). | 
| 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). | 
| 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). | 
| 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. | 
| 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. | 
| 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). | 
| 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 | ||
| Hernando,
                MS De Soto Co. United States | US 51 / W Oak Grove Rd. (34.81591, -89.99366) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2024 | https://www.youtube.com/watch?v=DyREbRKFmQQ | 
| 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). | 
| 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). | 
| 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. | |
| 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. | 
| 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. | 
| 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). | 
| Senatobia,
                MS Tate Co. United States | US 51 / W Main St. (34.61802, -89.96854) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2025 | https://mdot.ms.gov/portal/news_release_view/2186 | 
| 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. | 
| Reedsburg,
                WI Sauk Co. United States | STH 23-STH 33 / STH 136 / Golf View Ct. (43.53251, -89.95461) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2023 | https://wisdot.maps.arcgis.com/apps/webappviewer/index.html?id=106c80b1ec5f42a5a8808e6acad23067 | 
| 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. / 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. | 
| 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 | ||
| 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. | 
| Lacombe,
                LA St. Tammany Par. United States | US 190 / LA-434 (30.31610, -89.93388) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 36.0853 | Other (At-Grade) Single-Lane | 2013 | ICD estimated from Google Maps linework. | 
| O'Fallon,
                IL St. Clair Co. United States | Porter Rd. / Simmons Rd. (38.60258, -89.93231) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 31.7342 | Other (At-Grade) Single-Lane | 2011 | Year Completed estimated (2010-2011). ICD estimated from Google Maps linework. | 
| O'Fallon,
                IL St. Clair Co. United States | Cambridge Blvd. / St Francis Way / St Elizabeth's Blvd. (38.58493, -89.93023) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 32.6755 | Other (At-Grade) Single-Lane | 2016 | Roundabout built by hospital. ICD estimated from Google Maps linework. | 
| O'Fallon,
                IL St. Clair Co. United States | Simmons Rd. / Milburn School Rd. / Fairwood Hills Rd. (38.61146, -89.92906) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 44.7957 | Other (At-Grade) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| O'Fallon,
                IL St. Clair Co. United States | W State St. / Obernuefermann Rd. / Schwaegel Rd. (38.59229, -89.92877) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.2043 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| Shiloh,
                IL St. Clair Co. United States | Wingate Blvd. / London Ln. (38.52931, -89.92521) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | ||
| Swansea,
                IL St. Clair Co. United States | Berwick Crossing (38.53100, -89.92281) | Other Existing | Unknown Unknown | 2 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | ||
| O'Fallon,
                IL St. Clair Co. United States | Old Vincennes Trl. / Seven Hills Rd. / E State St. (38.59342, -89.89246) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.4056 | Other (At-Grade) Single-Lane | 2012 | ICD estimated from Google Maps linework. | 
| East Memphis,
                TN Shelby Co. United States | Ridgeway Loop Rd. / (parking) (35.10122, -89.86462) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.4800 | Other (At-Grade) Single-Lane | 2010 | Right-turn-only lane on north leg. Internal shopping center access roads. | 
| Perryville,
                MO Perry Co. United States | US 61 / N Main St. (MO Rte B) (37.73198, -89.86228) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 43.4504 | Other (At-Grade) Single-Lane | 2003 | Skewed intersection with right-turn bypass lanes on north and south legs. ICD estimated from Google Maps linework. | 
| Wisconsin Rapids,
                WI Wood Co. United States | STH 54 (2nd Ave.) / Gaynor Ave. / 17th Ave. (44.38025, -89.84447) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 44.3874 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2004 | Opened September 2004. Previously controlled by two-way stop Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Wisconsin Rapids,
                WI Wood Co. United States | 4th Ave. N / W Jackson St. (44.39515, -89.82829) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 33.5280 | Other (At-Grade) Single-Lane | 2022 | https://finance.yahoo.com/news/west-jackson-street-construction-roundabout-100032878.html | 
| Wisconsin Rapids,
                WI Wood Co. United States | Baker St. / Market St. / 1st St. N (44.39312, -89.82197) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 44.1960 | Other (At-Grade) Single-Lane | 2014 | Elliptical shaped. ICD = 145 ft x 130 ft. | 
| Mascoutah,
                IL St. Clair Co. United States | Falling Leaf Way / Timberbrook Dr. / Antique Ln. (38.50300, -89.81853) | Other Existing | Uncontrolled Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | No splitter islands. | |
| Olive Branch,
                MS De Soto Co. United States | Joe Lyon Blvd. / Lorrie Ln. (34.98979, -89.81802) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Eden Isle,
                LA St. Tammany Par. United States | Cutter Cove / Royal Palm Dr. / Clipper Dr. (30.22308, -89.80531) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | ||
| Wisconsin Dells,
                WI Sauk Co. United States | US 12 (Wisconsin Fells Pkwy.) / Fitzgerald Rd. / CR A (43.63331, -89.79087) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Single-Lane | 2020 | |
| (unincorporated),
                WI Sauk Co. United States | Reedsburg Rd. / US 12 EB Ramps (43.53258, -89.78800) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 46.7569 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| (unincorporated),
                WI Sauk Co. United States | Reedsburg Rd. / US 12 WB Ramps (43.53249, -89.78612) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 41.5617 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| (unincorporated),
                WI Sauk Co. United States | STH 33 / US 12 EB Ramps (43.51449, -89.78516) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 40.7080 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| (unincorporated),
                WI Sauk Co. United States | CTH BD (Fern Dell Rd.) / Moon Rd. / Giebel Ct. (43.56057, -89.78316) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.8114 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2010 | Series of 4 roundabouts. ICD estimated from Google Maps linework. | 
| (unincorporated),
                WI Sauk Co. United States | STH 33 / US 12 WB Ramps (43.51445, -89.78288) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 41.5741 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| (unincorporated),
                WI Sauk Co. United States | CTH BD (Fern Dell Rd.) / US 12 WB Ramps (43.55867, -89.78077) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 41.5437 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2010 | Series of 4 roundabouts. ICD estimated from Google Maps linework. | 
| (unincorporated),
                WI Sauk Co. United States | CTH BD (Fern Dell Rd.) / US 12 EB Ramps (43.55774, -89.77940) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 40.6788 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2010 | Series of 4 roundabouts. ICD estimated from Google Maps linework. | 
| Slidell,
                LA St. Tammany Par. United States | Oak Harbor Blvd. / E Howze Beach Rd. (30.21894, -89.77929) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2021 | Add-lane right-turn bypass lane on southeast leg and northeast leg.. | 
| Baraboo,
                WI Sauk Co. United States | CR W / US 12 EB Ramps (43.46004, -89.77893) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 51.8160 | Freeway Ramps (Grade-Separated) Single-Lane | 2017 | 2 new roundabouts at ramp terminals on new bypass project. | 
| (unincorporated),
                WI Sauk Co. United States | CTH BD (Fern Dell Rd.) / Timothy Ln. (43.55597, -89.77811) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 39.8145 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2010 | Series of 4 roundabouts. ICD estimated from Google Maps linework. | 
| Baraboo,
                WI Sauk Co. United States | CR W / US 12 WB Ramps (43.45996, -89.77719) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 51.8160 | Freeway Ramps (Grade-Separated) Single-Lane | 2014 | 2 new roundabouts at ramp terminals on new bypass project. | 
| Baraboo,
                WI Sauk Co. United States | Old US 12 / CTH BD (43.48896, -89.77718) | Roundabout Removed | All-Way Yield None | 4 Approaches 0 Driveways 50.2920 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2010 | Constructed in 2010. Removed in 2017(?) due to bypass expansion. | 
| (unincorporated),
                WI Sauk Co. United States | Moon Rd. / Timothy Ln. (43.56132, -89.77681) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.0800 | Other (At-Grade) Single-Lane | 2010 | Fatal crash July 10, 2010. ICD estimated from Google Maps linework. | 
| West Baraboo,
                WI Sauk Co. United States | Linn St. / US 12 EB Ramps (43.47476, -89.77598) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 51.8160 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2017 | 2 new roundabouts at ramp terminals on new bypass project. | 
| Wisconsin Dells,
                WI Columbia Co. United States | La Crosse St. / Superior St. / (parking) (43.62545, -89.77531) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 1 Driveways 33.5280 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2019 | Elliptical shaped. ICD = 110 ft x 100 ft. |