| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| Frederick,
                MD Frederick Co. United States | Synergy Way (39.43898, -77.36665) | Roundabout Existing | All-Way Yield None | 2 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2010 | Year Completed estimated (2009-2011). | 
| Virginia Footills,
                NV Washoe Co. United States | Buchephalus Pkwy. / Copenhagen Way / Bonfire Ln. (39.43838, -119.71442) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | ||
| Terre Haute,
                IN Vigo Co. United States | 2440 Huber Ln (39.43817, -87.38012) | Traffic Calming Circle Existing | Unknown None | 2 Approaches 4 Driveways 23.0598 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Terre Haute,
                IN Vigo Co. United States | 2328 Huber Ln (39.43817, -87.38160) | Traffic Calming Circle Existing | Unknown None | 2 Approaches 2 Driveways 23.0598 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Terre Haute,
                IN Vigo Co. United States | 2216 Huber Ln (39.43806, -87.38327) | Traffic Calming Circle Existing | Unknown None | 1 Approaches 2 Driveways 23.0599 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Frederick,
                MD Frederick Co. United States | Synergy Way / Progress Dr. (39.43796, -77.36660) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.0520 | Other (At-Grade) Single-Lane | 2008 | |
| Virginia Footills,
                NV Washoe Co. United States | Bucephalus Pkwy. / Show Jumper Ln. (39.43790, -119.71097) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2015 | Painted splitter islands on north and south legs. Year Completed estimated (2014-2015). | 
| (unincorporated),
                CO Douglas Co. United States | Fox Sparrow Rd. / Windhaven Dr. (39.43781, -104.73199) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 26.7495 | Other (At-Grade) Single-Lane | 1998 | Year Completed estimated (1993-1999). ICD estimated from Google Maps linework. | 
| Virginia Footills,
                NV Washoe Co. United States | Bucephalus Pkwy. / Burmese Ln. / Show Jumper Ln. (39.43756, -119.70732) | Other Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands on north and south legs. | |
| Townsend,
                DE New Castle Co. United States | Tony Marchio Dr. / Campus Dr. / Stadium Way (39.43676, -75.64873) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 53.3400 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2014 | Concentric striping on circulatory roadway. Right-turn-only arrows in all lanes of three entries. Year Completed estimated (2011-2015). | 
| Reno,
                NV Washoe Co. United States | Burghley Ln. / Kerrydale Ct. (39.43443, -119.71424) | Other Existing | Unknown Unknown | 2 Approaches 5 Driveways 0.0000 | Other (At-Grade) Unknown | ||
| Dulaney Forest,
                MD Baltimore Co. United States | E Ridgely Rd. / Margate Rd. (39.43199, -76.60754) | Traffic Calming Circle Existing | All-Way Yield None | 4 Approaches 0 Driveways 19.8120 | Other (At-Grade) Single-Lane | 2013 | No raised splitter islands on side street. Year Completed estimated (2012-2014). | 
| Virginia Footills,
                NV Washoe Co. United States | Burghley Ln. / Calais Ln. (39.43197, -119.71530) | Unknown Existing | Unknown Unknown | 3 Approaches 4 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Egg Harbor,
                NJ Atlantic Co. United States | Tilton Road Circle (39.43177, -74.57915) | Signalized Roundabout/Circle Existing | Signal Unknown | 5 Approaches 0 Driveways 0.0000 | Other (At-Grade) Multilane (2 Lane, unspecified) | Hamburger shaped. | |
| Montalto Uffugo,
                Calabria Cosenza Italy | SP248 (Corso Italia) / SP102 (Via Alessandro Manzoni) (39.43119, 16.23146) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Parachute,
                CO Garfield Co. United States | Old Hwy 6 / I-70 WB Ramps (39.42982, -108.07610) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 51.8160 | Freeway Ramps (Grade-Separated) Single-Lane | 2012 | |
| Castle Rock,
                CO Douglas Co. United States | Sapphire Pointe Blvd. / Tremolite Dr. (39.42908, -104.85397) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 52.5832 | Other (At-Grade) Single-Lane | 2005 | No buffer between sidewalk and circulatory roadway. ICD estimated from Google Maps linework. | 
| Sykesville,
                MD Carroll Co. United States | Old Washington Rd. (MD 97) / W Old Liberty Rd. (39.42906, -77.00755) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 34.1330 | Other (At-Grade) Single-Lane | 2000 | Year Completed estimated (1995-2005). ICD estimated from Google Maps linework. | 
| Reisterstown,
                MD Baltimore Co. United States | Winged Foot Dr. / Crystal Downs Ct. / Kauri Cliffs Rd. (39.42897, -76.81445) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Middletown,
                DE New Castle Co. United States | St Annes Church Rd. / Levels Rd. (39.42842, -75.73887) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 35.9783 | Other (At-Grade) Single-Lane | 2010 | Intersection was relocated when converted to roundabout. ICD estimated from Google Maps linework. | 
| (unincorporated),
                CO Douglas Co. United States | W Happy Canyon Rd. / Castle Pines Dr. (39.42838, -104.90106) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.8306 | Other (At-Grade) Single-Lane | 2011 | ICD estimated from Google Maps linework. | 
| Parachute,
                CO Garfield Co. United States | Old Hwy 6 / I-70 EB Ramps / (unknown) (39.42828, -108.07440) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 57.9120 | Freeway Ramps (Grade-Separated) Single-Lane | 2012 | |
| Castle Rock,
                CO Douglas Co. United States | Sapphire Pointe Blvd. / Sulfur Ln. / Peridot Ln. (39.42788, -104.84576) | Other Existing | All-Way Yield None | 4 Approaches 0 Driveways 63.6545 | Other (At-Grade) Single-Lane | 2003 | Single-stage pedestrian crossings, fully traversable splitter islands, no buffer between sidewalk and circulatory roadway. Year Completed estimated (2002-2005). ICD estimated from Google Maps linework. | 
| Montalto Uffugo,
                Calabria Cosenza Italy | SP241 (Corso Italia) / Via Busento (39.42609, 16.23949) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Martinsville,
                IN Morgan Co. United States | SR 252 (Morgantown Rd.) / I-69 SB Ramps / Hospital Dr. (39.42578, -86.40211) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Freeway Ramps (Grade-Separated) Single-Lane | 2021 | Replaced at-grade signalized intersection. Opened to traffic 12/2021. https://i69finishline.com/construction-schedule/. | 
| Virginia Footills,
                NV Washoe Co. United States | McCauley Ranch Blvd. / Gold Mine Dr. (39.42575, -119.70909) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.1480 | Other (At-Grade) Single-Lane | 2007 | Painted splitter islands on all legs. | 
| Middletown,
                DE New Castle Co. United States | St Annes Church Rd. / Wiggins Mill Rd. (39.42541, -75.72769) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 34.1348 | Other (At-Grade) Single-Lane | 2010 | Previous intersection was relocated when converted to roundabout. ICD estimated from Google Maps linework. | 
| Chillicothe,
                OH Ross Co. United States | SR 159 / SR 180 (39.42539, -82.95429) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2020 | https://www.facebook.com/ODOTDistrict9/videos/ross-207-extension-first-trip/344554030308290/ | 
| Martinsville,
                IN Morgan Co. United States | SR 252 (Morgantown Rd.) / I-69 NB Ramps (39.42498, -86.40092) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 0.0000 | Freeway Ramps (Grade-Separated) Single-Lane | 2021 | Replaced at-grade signalized intersection. | 
| Castle Rock,
                CO Douglas Co. United States | Castle Rock Pkwy. / Promenade Pkwy. / I-25 SB Off-Ramp / I-25 NB Ramps (39.42427, -104.87786) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 43.3611 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2016 | ICD estimated from Google Maps linework. | 
| Martinsville,
                IN Morgan Co. United States | SR 252 (Morgantown Rd.) / Cramertown Loop (39.42394, -86.39938) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2021 | Opened 12/2021 as part of the I-69 opening around Martinsville. https://i69finishline.com/construction-schedule/. | 
| Castle Rock,
                CO Douglas Co. United States | Promenade Pkwy. / (parking lot) (39.42238, -104.87869) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.5233 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2016 | ICD estimated from Google Maps linework. | 
| Linganore,
                MD Frederick Co. United States | Woodridge Rd. / Woodland Rd. (39.42155, -77.32956) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Owings Mills,
                MD Baltimore Co. United States | Tollgate Rd. / Lastgage Rd. (39.42149, -76.78482) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 28.6010 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Liberty Township,
                OH Butler Co. United States | Aspenwood Dr. / Aspen Trail Blvd. (39.42119, -84.44619) | Other Existing | All-Way Yield None | 3 Approaches 0 Driveways 26.7559 | Other (At-Grade) Single-Lane | 2003 | No splitter islands. ICD estimated from Google Maps linework. | 
| Terre Haute,
                IN Vigo Co. United States | Willow Run Ct. / Aspen Ct. / Magnolia Ct. (39.42072, -87.32787) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 101.4886 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Hanover Township,
                OH Butler Co. United States | Stahlheber Rd. / Morman Rd. (39.42038, -84.64629) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2023 | |
| Townsend,
                DE New Castle Co. United States | N Odessa Blvd. / Tweedsmere Dr. / Aviemore Dr. / Ravenglass Dr. (39.41965, -75.63644) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Chillicothe,
                OH Ross Co. United States | SR 159 / SR 207 (39.41938, -82.95615) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2020 | https://www.facebook.com/ODOTDistrict9/videos/ross-207-extension-first-trip/344554030308290/ | 
| Linganore,
                MD Frederick Co. United States | Boyers Mill Rd. / Eaglehead Dr. (39.41912, -77.30650) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.5280 | Other (At-Grade) Single-Lane | 2018 | |
| Castle Rock,
                CO Douglas Co. United States | Promenade Pkwy. / (parking lots) (39.41882, -104.87797) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.5192 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2016 | ICD estimated from Google Maps linework. | 
| Castle Rock,
                CO Douglas Co. United States | Castle Oaks Dr. / Arabella Dr. (39.41863, -104.77860) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2006 | |
| Lutherville-Timonium,
                MD Baltimore Co. United States | MD 139 (Charles St.) / Bellona Ave. (39.41790, -76.62900) | Roundabout Removed | All-Way Yield None | 4 Approaches 0 Driveways 28.9560 | Other (At-Grade) Multilane (2 Lane, unspecified) | 1999 | Two-lane circulatory roadway across northern half. | 
| Liberty Township,
                OH Butler Co. United States | Kyles Station Rd. / Lesourdsville West Chester Rd. (39.41743, -84.43708) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.5974 | Other (At-Grade) Single-Lane | 2012 | ICD estimated from Google Maps linework. | 
| Castle Rock,
                CO Douglas Co. United States | N Meadows Dr. / (unknown) (39.41690, -104.89226) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 53.3400 | Other (At-Grade) Multilane (2 Lane, 2x2 max) | 2021 | |
| Silver Springs,
                NV Lyon Co. United States | US 50 / Alt US 95 (39.41616, -119.22497) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2020 | https://mynews4.com/news/local/new-us-5095a-traffic-roundabout-to-open-in-silver-springs-tomorrow | 
| Townsend,
                DE New Castle Co. United States | Robinson Rd. / Goldsborough Dr. (39.41614, -75.65156) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands on three legs. | |
| Liberty Township,
                OH Butler Co. United States | Kyles Station Rd. / Yankee Rd. (39.41489, -84.38421) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.5988 | Other (At-Grade) Single-Lane | 2013 | ICD estimated from Google Maps linework. | 
| Terre Haute,
                IN Vigo Co. United States | IN-46 / IN-641 SB Ramps (39.41463, -87.33553) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Freeway Ramps (Grade-Separated) Single-Lane | 2016 | |
| Liberty Township,
                OH Butler Co. United States | Kyles Station Rd. / Cincinnati Dayton Rd. (39.41390, -84.36743) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.5994 | Other (At-Grade) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| Castle Rock,
                CO Douglas Co. United States | New Beale St. / (parking) (39.41325, -104.87702) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2007 | Year Completed estimated (2006-2008). | 
| Sykesville,
                MD Carroll Co. United States | Bennett Rd. / Monroe Ave. (39.41306, -76.92967) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 26.7590 | Other (At-Grade) Single-Lane | 2006 | ICD estimated from Google Maps linework. | 
| Frederick,
                MD Frederick Co. United States | Hillsborough Dr. / Hillsborough Terrace / Forest Hills Ct. (39.41266, -77.34441) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Terre Haute,
                IN Vigo Co. United States | IN-46 / IN-641 NB Ramps (39.41253, -87.33459) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 36.9093 | Freeway Ramps (Grade-Separated) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| Owings Mills,
                MD Baltimore Co. United States | Upper Mill Dr. / Bluestem Ct. /Spring Willow Ct. / Bayline Cir. (39.41253, -76.82032) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Fort Bragg,
                CA Mendocino Co. United States | Hwy 1 / Simpson Ln. (39.41239, -123.80830) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 52.5958 | Other (At-Grade) Single-Lane | 2012 | ICD estimated from Google Maps linework. | 
| Joppa,
                MD Harford Co. United States | Trimble Rd. / Fort Hoyle Rd. (39.41183, -76.33325) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 30.4800 | Other (At-Grade) Single-Lane | 2012 | Year Completed estimated (2011-2013). | 
| Perry Hall,
                MD Baltimore Co. United States | Seven Courts Dr. / Proctor Ln. (39.41060, -76.48483) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.4320 | Other (At-Grade) Single-Lane | 2008 | Year Completed estimated (2007-2008). | 
| Owings Mills,
                MD Baltimore Co. United States | New Town Blvd. / Rangeford Dr. (39.40957, -76.80654) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Townsend,
                DE New Castle Co. United States | Glen Mohr Dr. / Perthshire Dr. / S Odessa Blvd. (39.40908, -75.63633) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Casal da Boavista de São Gregório,
                Leiria Caldas da Rainha Portugal | Rua Doutor Vieira Pereira / Rua Inseparáveis De Lubango / Rua da Crocha (39.40878, -9.12190) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Montalto Uffugo,
                Calabria Cosenza Italy | SP247 (Via Sila) / Via Coretta (39.40860, 16.25275) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Frederick,
                MD Frederick Co. United States | Claridge Dr. S / Spring Ridge Pkwy. (39.40767, -77.33577) | Roundabout Existing | All-Way Yield None | 3 Approaches 2 Driveways 35.0520 | Other (At-Grade) Single-Lane | 2002 | Painted splitter islands on two legs. Year Completed estimated (1988-2005). | 
| Owings Mills,
                MD Baltimore Co. United States | Grand Central Ave. / Waverly Ln. (39.40713, -76.78413) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2014 | Year Completed estimated (2011-2014). West leg added 2015. | 
| Rose,
                Calabria Cosenza Italy | SP234 / SP247 (39.40709, 16.26141) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Frederick,
                MD Frederick Co. United States | Briarcliff Ln. / Briarcliff Way / Cliffside Terrace (39.40696, -77.34925) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Frederick,
                MD Frederick Co. United States | Butterfly Ln. / Himes Ave. (39.40671, -77.44764) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | 2020 | https://www.cityoffrederickmd.gov/CivicAlerts.aspx?aid=6432 | 
| Frederick,
                MD Frederick Co. United States | S East St. / (future road) (39.40599, -77.40392) | Roundabout Existing | All-Way Yield None | 2 Approaches 0 Driveways 51.8160 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2009 | Year Completed estimated (2009-2011). East leg is stubbed for future connection. | 
| Fairfield Township,
                OH Butler Co. United States | Millikin Rd. / Morris Rd. / Carter Cir. (39.40585, -84.49448) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2024 | Roundabout opened August 3, 2024. | 
| Owings Mills,
                MD Baltimore Co. United States | Grand Central Ave. / (parking) (39.40581, -76.78033) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 48.7680 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2014 | Year Completed estimated (2011-2014). | 
| White Marsh Station,
                MD Baltimore Co. United States | Carrington Dr. / Jerome Ave. (39.40574, -76.40236) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Perry Hall,
                MD Baltimore Co. United States | Scott Moore Way / Honeygo Center Dr. (39.40491, -76.44142) | Other Existing | All-Way Yield Unknown | 3 Approaches 1 Driveways 0.0000 | Other (At-Grade) Single-Lane | Pedestrian access to central island. | |
| Perry Hall,
                MD Baltimore Co. United States | Georgia Belle Dr. / Fragrence Way / Harcrest Way (39.40467, -76.42700) | Other Existing | All-Way Yield Unknown | 4 Approaches 4 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Martinsville,
                IN Morgan Co. United States | SR 39 (Morton Ave.) / I-69 SB Ramps / Rogers Rd. (39.40439, -86.44597) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2021 | I-69 freeway opened 12/23/2021 - see https://content.govdelivery.com/accounts/INDOT/bulletins/30250b9 ** Roundabout opened with temporary configuration while new southbound ramp construction is completed | 
| Townsend,
                DE New Castle Co. United States | Karins Circle (39.40433, -75.69677) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Perry Hall,
                MD Baltimore Co. United States | E Joppa Rd. / Scott Moore Way / Cowenton Ave. (39.40290, -76.44124) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.1000 | Other (At-Grade) Single-Lane | 2008 | Right-turn bypass lane on west leg. | 
| Liberty Twp,
                OH Butler Co. United States | Millikin Rd. / Lesourdsville West Chester Rd. (39.40278, -84.43386) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2025 | |
| Reno,
                NV Washoe Co. United States | SR 341 (Geiger Grade Rd.) / Veterans Pkwy. / (parking) (39.40271, -119.74165) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 62.4840 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2011 | Double left (left, left-through-right) on south leg; double right (left-through-right, right) on west leg. | 
| Liberty Township,
                OH Butler Co. United States | Millikin Rd. / Pinckney Trl. (39.40263, -84.43077) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2021 | |
| Martinsville,
                IN Morgan Co. United States | SR 39 / I-69 NB Ramps / Southview Dr. (39.40262, -86.44528) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 0.0000 | Freeway Ramps (Grade-Separated) Single-Lane | 2021 | Year Completed estimated (2020-2021). https://i69finishline.com/construction-schedule/. | 
| Linganore,
                MD Frederick Co. United States | Finn Dr. / Douglas Ave. / Huckleberry Way (39.40210, -77.29509) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | Pedestrian access to central island. No splitter islands. | |
| Towson,
                MD Baltimore Co. United States | MD 45 / MD 146 / Joppa Rd. / Allegheny Ave. (39.40185, -76.60230) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 47.9892 | Other (At-Grade) Multilane (2 Lane, unspecified) | 1998 | Opened October 1998. Exit striping retrofitted to roundabout after opening. Hotdog/racetrack shape. ICD estimated from Google Maps linework. 21442 | 
| Liberty Township,
                OH Butler Co. United States | Millikin Rd. / Maud Hughes Rd. (39.40153, -84.40943) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6837 | Other (At-Grade) Single-Lane | 2013 | ICD estimated from Google Maps linework. | 
| Reno,
                NV Washoe Co. United States | Herz Blvd. / Summit Sierra Blvd. (39.40118, -119.75215) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2006 | Concentric circulatory roadway striping. Year Completed estimated (2004-2006). | 
| Carbondale,
                CO Garfield Co. United States | CO-133 / Main St. (39.40113, -107.21968) | Roundabout Existing | All-Way Yield Rectangular Rapid Flashing Beacon (RRFB) | 4 Approaches 0 Driveways 42.4526 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2013 | ICD estimated from Google Maps linework. | 
| Liberty Township,
                OH Butler Co. United States | Yankee Rd. / Millikin Rd. (39.40022, -84.38541) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 34.1471 | Other (At-Grade) Single-Lane | 2018 | ICD estimated from Google Maps linework. | 
| Silver Springs,
                NV Lyon Co. United States | US 50 / USA Pkwy. / Opal Ave. (39.40014, -119.26883) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 64.0080 | Other (At-Grade) Multilane (3+ Lane) | 2017 | Consecutive double-left turns. | 
| Villages of Winterset,
                MD Baltimore Co. United States | Runnymeade Rd. / New Town Blvd. / Bon Haven Ln. (39.39893, -76.81700) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Linganore,
                MD Frederick Co. United States | Lake Linganore Blvd. / Eaglehead Dr. (39.39732, -77.31047) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 1 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2019 | Year Completed estimated (2018-2022). | 
| New Market,
                MD Frederick Co. United States | Eaglehead Dr. / Tomahawk St. / Fallfish Ct. (39.39677, -77.30826) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.0520 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2018 | Year Completed estimated (2017-2018). | 
| El Jebel,
                CO Eagle Co. United States | El Jebel Rd. / Shadow Rock Rd. (39.39554, -107.08999) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 128.2910 | Other (At-Grade) Single-Lane | 2017 | https://www.aspentimes.com/news/el-jebel-road-roundabout-opens-saturday/ ICD estimated from Google Maps linework. | 
| Frederick,
                MD Frederick Co. United States | Mercantile Dr. E / Rodes Cir. (39.39507, -77.44311) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Brigantine,
                NJ Atlantic Co. United States | Brigantine Blvd. / Bayshore Ave. / 34th St. S / (unknown) / (parking lot) (39.39482, -74.38953) | Other Existing | Other None | 7 Approaches 0 Driveways 28.6120 | Other (At-Grade) Multilane (2 Lane, unspecified) | All entries except Brigantine Blvd controled by stop signs. ICD estimated from Google Maps linework. | |
| Frederick,
                MD Frederick Co. United States | Jefferson Station Blvd. / Jefferson Commons Way (39.39479, -77.44916) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2015 | Year Completed estimated (2013-2015). | 
| Liberty Township,
                OH Butler Co. United States | The Trails Blvd. / Kensington Trl. / Windsor Trl. / Cambridge Trl. (39.39451, -84.34693) | Other Existing | All-Way Stop None | 4 Approaches 0 Driveways 50.7634 | Other (At-Grade) Single-Lane | 2002 | Stop control; no splitter islands. ICD estimated from Google Maps linework. | 
| Liberty Township,
                OH Butler Co. United States | Carriage House Blvd. / Thoroughbred Ln. / Winner Circle Dr. (39.39434, -84.45087) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.0730 | Other (At-Grade) Single-Lane | 2014 | ICD estimated from Google Maps linework. | 
| New Market,
                MD Frederick Co. United States | Empire Blvd. / Edwardian Ln. / Jacobian Pl. (39.39428, -77.29567) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | Parking along circulatory roadway. | |
| Owings Mills,
                MD Baltimore Co. United States | Painters Mill Rd. / Lyons Mill Rd. (39.39425, -76.78747) | Other Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| New Market,
                MD Frederick Co. United States | Eaglehead Dr. / Pecking Stone St. (39.39397, -77.30943) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 24.3840 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2016 | Year Completed estimated (2015-2017). | 
| Liberty Township,
                OH Butler Co. United States | Berkshire Pl. / Amberly Ct. / Wiltshire Ct. (39.39282, -84.34687) | Other Existing | All-Way Stop None | 4 Approaches 0 Driveways 27.6898 | Other (At-Grade) Single-Lane | 2002 | Stop control and no splitter islands. ICD estimated from Google Maps linework. |