| 
                City, 
                State County Country  | 
            
                Intersection (Lat, Lng)  | 
            
                Type Status  | 
            Control Type / Other Control Type | Approaches / Driveways / ICD (m) | 
                Functional Class /  LaneType  | 
            Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| 
                Castle Rock,
                CO Douglas Co. United States  | 
            
                Plum Creek Pkwy. / S Eaton Cir. / Eaton St. (39.36073, -104.83311)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 44.1960  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            2020 | Elliptical shaped. ICD = 145 ft x 115 ft. Year Completed estimated (2020-2021). | 
| 
                Castle Rock,
                CO Douglas Co. United States  | 
            
                S Ridge Rd. / Rapport Dr. (39.35511, -104.81475)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 32.0040  | 
            
                Other (At-Grade) Single-Lane  |   
            2020 | |
| 
                Castle Rock,
                CO Douglas Co. United States  | 
            
                Autumn Sage St. / Valley View Dr. (39.38026, -104.81919)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 62.4840  | 
            
                Other (At-Grade) Single-Lane  |   
            2016 | Year Completed estimated (2015-2017). | 
| 
                Castle Rock,
                CO Douglas Co. United States  | 
            
                N Rocky View Rd. / Valley View Rd. / High Point Rd. (39.38189, -104.81125)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 62.4840  | 
            
                Other (At-Grade) Single-Lane  |   
            2016 | Year Completed estimated (2015-2017). | 
| 
                Castle Pines,
                CO Douglas Co. United States  | 
            
                Westbridge Dr. / Cross Canyon Trl. (39.45951, -104.85287)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 50.2920  | 
            
                Other (At-Grade) Single-Lane  |   
            2019 | Year Completed estimated (2018-2019). | 
| 
                Parker,
                CO Douglas Co. United States  | 
            
                Cross Canyon Trl. / Canyon Forge Dr. (39.47008, -104.85988)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 51.8160  | 
            
                Other (At-Grade) Single-Lane  |   
            2018 | Year Completed estimated (2018-2019). | 
| 
                Selbyville,
                DE Sussex Co. United States  | 
            
                Sand Cove Rd. / Crosswinds Landing / Williamsville Rd. (38.45556, -75.10488)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Millsboro,
                DE Sussex Co. United States  | 
            
                Sterling Blvd. / Peninsula Esplanade (38.60821, -75.16426)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Marriottsville,
                MD Howard Co. United States  | 
            
                Sand Hill Rd. / Sand Hill Manor Dr. / Mount View Rd. (39.31018, -76.93043)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 28.9560  | 
            
                Other (At-Grade) Single-Lane  |   
            1998 | Year Completed estimated (1993-2002). | 
| 
                Ijamsville,
                MD Frederick Co. United States  | 
            
                Whiskey Rd. / Whiskey Ct. (39.36078, -77.30012)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Ijamsville,
                MD Frederick Co. United States  | 
            
                Royal Saint Andrews Pl. / Quail Creek Pl. (39.38039, -77.30788)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Ballenger Creek,
                MD Frederick Co. United States  | 
            
                Newton Dr. / Hiteshow Dr. / Cheatham Way (39.36597, -77.44595)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                5 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                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). | 
| 
                Ballenger Creek,
                MD Frederick Co. United States  | 
            
                Jefferson Technology Pkwy. / (unknown) (39.39256, -77.45666)  | 
            
                Unknown Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Boonsboro,
                MD Washington Co. United States  | 
            
                Monument Dr. / West Wing Way (39.50248, -77.65503)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Boonsboro,
                MD Washington Co. United States  | 
            
                Monument Dr. / Midlothian Way (39.50117, -77.65254)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Boonsboro,
                MD Washington Co. United States  | 
            
                Monument Dr. / East Wing Way (39.50047, -77.65002)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Winona,
                MN Winona Co. United States  | 
            
                US 14-US 61 / STH 43 (44.02956, -91.62216)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x2 max)  |   
            2022 | https://www.youtube.com/watch?v=xA9c17OwsGk | 
| 
                Urbana,
                MD Frederick Co. United States  | 
            
                Stone Barn Dr. / Longleaf Dr. (39.33278, -77.36713)  | 
            
                Unknown Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Gaithersburg,
                MD Montgomery Co. United States  | 
            
                Perry Pkwy. / (parking) (39.14899, -77.21048)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 47.2440  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            2004 | Year Completed estimated (2002-2005). | 
| 
                Redland,
                MD Montgomery Co. United States  | 
            
                Columbus Ave. / Gramercy Blvd. (39.12362, -77.16494)  | 
            
                Other Existing  | 
            
                All-Way Stop Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                King Farm,
                MD Montgomery Co. United States  | 
            
                Pleasant Circle (39.11623, -77.17518)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            Pedestrian access to central island. | |
| 
                Potomac,
                MD Montgomery Co. United States  | 
            
                10600 Morning Field Dr. / Sunny Brooke Ln. / Sunny Brooke Pl. (39.07423, -77.21561)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Potomac,
                MD Montgomery Co. United States  | 
            
                Broad Green Dr. / Clagett Farm Dr. (39.04566, -77.19669)  | 
            
                Other Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Potomac,
                MD Montgomery Co. United States  | 
            
                Larkmeade Ln. / Bells Ridge Dr. (39.03483, -77.16775)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Leesburg,
                VA Loudoun Co. United States  | 
            
                Beauregard Dr. SE / Fortress Cir. SE (39.09720, -77.55053)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Paeonian Springs,
                VA Loudoun Co. United States  | 
            
                Charles Town Pike / SR 7 WB Ramps (39.14190, -77.61205)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 53.3400  | 
            
                Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x1 max)  |   
            2015 | Year Completed estimated (2014-2016). | 
| 
                Marana,
                AZ Pima Co. United States  | 
            
                N Sandario Rd. / W Twin Peaks Rd. (32.38076, -111.21671)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | https://www.maranaaz.gov/news/2022/5/25/traffic-alert-construction-on-a-new-roundabout-located-at-the-twin-peaks-and-sandario-road-intersection | 
| 
                Carpinteria,
                CA Santa Barbara Co. United States  | 
            
                Ogan Rd. / Via Real / US 101 NB On-Ramp (34.40144, -119.51551)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 38.1000  | 
            
                Freeway Ramps (Grade-Separated) Single-Lane  |   
            2020 | https://www.coastalview.com/news/roadways-open-with-improvements/article_979e3586-c6f1-11ea-bc84-b3d50932177b.html | 
| 
                Lima,
                OH Allen Co. United States  | 
            
                Market St. / Main St. (40.73998, -84.10498)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | https://www.hometownstations.com/news/more-downtown-parking-being-added-now-that-roundabout-in-limas-town-square-is-open/article_b354ae8e-085a-11ed-8496-e7e7595f316f.html [Note: previous intersection looked somewhat like a roundabout. Not quite round and it had stop signs on the N-S approaches and only pedestrian stop lights on E-W approaches.] | 
| 
                Baton Rouge,
                LA East Baton Rouge Par. United States  | 
            
                Stumberg Ln. / Womans Way (30.38264, -91.03593)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 59.4360  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x2 max)  |   
            2012 | Year Completed estimated (2011-2013). | 
| 
                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 | |
| 
                Baton Rouge,
                LA East Baton Rouge Par. United States  | 
            
                N Stadium Rd. / Field House Dr. (30.41398, -91.18246)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 30.4800  | 
            
                Other (At-Grade) Single-Lane  |   
            2006 | On campus of Louisiana State University. | 
| 
                Baton Rouge,
                LA East Baton Rouge Par. United States  | 
            
                Capitol Access Rd. / Capitol Lake Dr. (30.45808, -91.18278)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 38.1000  | 
            
                Other (At-Grade) Single-Lane  |   
            2016 | |
| 
                Baton Rouge,
                LA East Baton Rouge Par. United States  | 
            
                Capitol Lake Rd. / Capitol Access Rd. (30.45818, -91.18621)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 38.1000  | 
            
                Other (At-Grade) Single-Lane  |   
            2016 | |
| 
                Casper,
                WY Natrona Co. United States  | 
            
                Rustic Dr. / Rustic Ct. / Rustic Pl. (42.82970, -106.28379)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                5 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Casper,
                WY Natrona Co. United States  | 
            
                Jasper Dr. / Preserve Cir. (42.82867, -106.28915)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            No splitter islands on three legs. | |
| 
                Cheyenne,
                WY Laramie Co. United States  | 
            
                (unknown) / (parking) (41.10110, -104.78426)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 51.8160  | 
            
                Other (At-Grade) Single-Lane  |   
            2019 | Year Completed estimated (2019-2021). | 
| 
                Cheyenne,
                WY Laramie Co. United States  | 
            
                (unknown) / (parking) (41.10103, -104.78019)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 51.8160  | 
            
                Other (At-Grade) Single-Lane  |   
            2019 | Year Completed estimated (2019-2021). | 
| 
                Houston,
                TX Harris Co. United States  | 
            
                Point Park Dr. / (unknown) (29.90706, -95.63522)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Cypress,
                TX Harris Co. United States  | 
            
                Fairfield Green Blvd. / Fairfield Park Dr. (30.00533, -95.75155)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Cypress,
                TX Harris Co. United States  | 
            
                Fairfield Green Circle (30.00584, -95.74990)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            Building in central island. | |
| 
                Cypress,
                TX Harris Co. United States  | 
            
                Golden Elm Circle (30.00926, -95.75279)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            Pedestrian access to central island. | |
| 
                Magnolia,
                TX Montgomery Co. United States  | 
            
                Magnolia Ridge Blvd. / Jewett Meadow Dr. / Rogerdale River Dr. (30.21121, -95.73470)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            ||
| 
                Vestal,
                NY Broome Co. United States  | 
            
                Glenn G Bartle Dr. / West Dr. (42.09200, -75.96836)  | 
            
                Other Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x2 max)  |   
            Concentric striped circulatory roadway. | |
| 
                Athol,
                ID Kootenai Co. United States  | 
            
                SR 54 / N Good Hope Rd. / N Perimeter Rd. (47.94732, -116.61237)  | 
            
                Rotary Existing  | 
            
                Other None  | 
            
                4 Approaches 0 Driveways 126.4920  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            Yield signs on circulatory roadway. Elliptical shaped. ICD = 415 ft x 370 ft. | |
| 
                Lincoln,
                NE Lancaster Co. United States  | 
            
                W A St. / S Folsom St. (40.79911, -96.73022)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-lane w/ Traversable Central Island  |   
            2022 | https://www.lincoln.ne.gov/City/Departments/LTU/LTU-Projects/Projects/West-A-Street-Improvement-Project (video shows the roundabout at about 1:45) | 
| 
                Princeton,
                NJ Mercer Co. United States  | 
            
                Rosedale Rd. / General Johnson Dr. (40.34571, -74.68801)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Rectangular Rapid Flashing Beacon (RRFB)  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-lane w/ Traversable Central Island  |   
            2022 | https://planetprinceton.com/2022/08/25/rosedale-road-roundabout-project-now-complete/ | 
| 
                Farmville,
                VA Prince Edward Co. United States  | 
            
                Farmville Rd. / Kingsville Rd. (37.24605, -78.44392)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | Opened August 17, 2022. https://www.farmvilleherald.com/2022/08/kingsville-roundabout-finally-open/ | 
| 
                Niagara Falls,
                ON Niagara Canada  | 
            
                Victoria Ave. / Bridge St. / Thorold Stone Rd. (43.10884, -79.07338)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                5 Approaches 0 Driveways 64.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | https://www.youtube.com/watch?v=PJwDZ6g8cT0 | 
| 
                St Joseph,
                MO Buchanan Co. United States  | 
            
                Robidoux St. / 8th St. (39.76984, -94.85063)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 24.3840  | 
            
                Other (At-Grade) Single-Lane  |   
            2015 | Year Completed estimated (2014-2015). https://www.newspressnow.com/opinion/editorials/progress-in-a-roundabout-way/article_3dba548e-dbbf-11ec-9a02-6faad919c23d.html | 
| 
                Auraria,
                CO Denver Co. United States  | 
            
                Saint Francis Way / 11th St. (39.74196, -105.00110)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Denver,
                CO Arapahoe Co. United States  | 
            
                S Yosemite St. / E Wesley Dr. (39.67305, -104.88513)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            No splitter islands. | |
| 
                Saddle Rock East,
                CO Arapahoe Co. United States  | 
            
                E Roxbury Dr. / S Wenatchee Way (39.58699, -104.72125)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Tallyns Reach,
                CO Arapahoe Co. United States  | 
            
                E Roxbury Dr. / E Easter Dr. (39.58714, -104.71273)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Inspiration,
                CO Douglas Co. United States  | 
            
                Gartrell Rd. / E Rocky Top Ave. (39.55491, -104.70847)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 27.4320  | 
            
                Other (At-Grade) Single-Lane  |   
            2020 | Year Completed estimated (2019-2021). | 
| 
                Lake Frendrica,
                FL Orange Co. United States  | 
            
                Calais Way. / (unknown) (28.51201, -81.30806)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            No splitter islands. | |
| 
                Pershing,
                FL Orange Co. United States  | 
            
                (unknown) (28.49767, -81.29662)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Villages at Eastwood,
                FL Orange Co. United States  | 
            
                Golfway Blvd. / Cavan Ln. (28.53207, -81.17764)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Coatesville,
                PA Chester Co. United States  | 
            
                Trego Ave. / Fuller St. (39.97676, -75.89185)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Coatesville,
                PA Chester Co. United States  | 
            
                Trego Ave. / (unknown) (39.97548, -75.89578)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Billings,
                MT Yellowstone Co. United States  | 
            
                Central Ave. / 56th St. W (45.76970, -108.65917)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | https://www.mdt.mt.gov/pubinvolve/56thRoundabouts/ | 
| 
                Helena,
                MT Lewis and Clark Co. United States  | 
            
                Lincoln Rd. / N Montana Ave. (46.70444, -112.02096)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | https://www.ktvh.com/news/lincoln-road-roundabout-opens-to-drivers | 
| 
                Woodbourne-Hyde Park,
                OH Montgomery Co. United States  | 
            
                Mad River Rd. / W Alex Bell Rd. (39.65510, -84.19420)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | https://www.whio.com/news/local/washington-twp-roundabout-set-open-within-next-week/JEWIGLMTEBBDXJ3PZ2QO3ILVQ4/ | 
| 
                Enoch,
                UT Iron Co. United States  | 
            
                SR 130 (N Minersville Hwy.)  / E Midvalley Rd. (37.76474, -113.05532)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2021 | Completed November 2021. | 
| 
                Derwood,
                MD Montgomery Co. United States  | 
            
                Achille Ln. / Heartwood Dr. (39.12925, -77.11543)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            No splitter islands. | |
| 
                Derwood,
                MD Montgomery Co. United States  | 
            
                Heartwood Dr. (39.13239, -77.11434)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                2 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Derwood,
                MD Montgomery Co. United States  | 
            
                Coppelia Dr. / Toboggan Ln. (39.13566, -77.11938)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            No splitter islands. | |
| 
                Olney,
                MD Montgomery Co. United States  | 
            
                Martins Dairy Cir. / Old Baltimore Rd. (39.13345, -77.07382)  | 
            
                Other Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            Painted splitter islands. | |
| 
                Wheaton,
                MD Montgomery Co. United States  | 
            
                Park Vista Dr. / Wintergate Dr. / Longmeade Crossing Dr. (39.10755, -77.05340)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 30.4800  | 
            
                Other (At-Grade) Single-Lane  |   
            2020 | Painted splitter islands added 2020. | 
| 
                Ashton,
                MD Montgomery Co. United States  | 
            
                Harbour Town Dr. / Grand Cypress Ct. (39.13205, -77.00407)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            No splitter islands. | |
| 
                West End,
                MT Yellowstone Co. United States  | 
            
                Central Ave. / S 38th St. W (45.76969, -108.61240)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Pedestrian Hybrid Beacon (PHB, HAWK)  | 
            
                4 Approaches 0 Driveways 47.2440  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            2019 | |
| 
                West End,
                MT Yellowstone Co. United States  | 
            
                Central Ave. / S 36th St. W (45.76949, -108.60726)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Pedestrian Hybrid Beacon (PHB, HAWK)  | 
            
                4 Approaches 0 Driveways 47.2440  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            2019 | |
| 
                Novi,
                MI Oakland Co. United States  | 
            
                Gateway Rd. / Woodstone Ln. (42.52271, -83.49676)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            No splitter islands. | |
| 
                Wixom,
                MI Oakland Co. United States  | 
            
                W Chambers St. / Johanna Ware W (42.52579, -83.53382)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            No splitter islands. | |
| 
                Maple Ash,
                AZ Maricopa Co. United States  | 
            
                W 9th St. / S Maple Ave. (33.42046, -111.94122)  | 
            
                Traffic Calming Circle Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Maple Ash,
                AZ Maricopa Co. United States  | 
            
                W 9th St. / S Ash Ave. (33.42048, -111.94237)  | 
            
                Traffic Calming Circle Existing  | 
            
                All-Way Stop Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Maple Ash,
                AZ Maricopa Co. United States  | 
            
                W 11th St. / S Maple Ave. (33.41763, -111.94123)  | 
            
                Traffic Calming Circle Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Maple Ash,
                AZ Maricopa Co. United States  | 
            
                W 12th St. / S Maple Ave. (33.41619, -111.94121)  | 
            
                Traffic Calming Circle Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Carmel,
                IN Hamilton Co. United States  | 
            
                E 116th St. / S Rangeline Rd. / Westfield Blvd. (39.95661, -86.12675)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x2 max)  |   
            2022 | Opened August 22, 2022. http://carmellink.com/project.php?title=116th%20Street%20and%20Range%20Line%20Road%20Roundabout | 
| 
                Seven Valleys,
                PA York Co. United States  | 
            
                Grand Lake Dr. / Grand Oak Way (39.86507, -76.71601)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Seven Valleys,
                PA York Co. United States  | 
            
                Countryside Rd. / Morningside Way (39.86287, -76.71666)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Hartford,
                CT Hartford Co. United States  | 
            
                Pulaski Circle (41.76294, -72.67616)  | 
            
                Rotary Existing  | 
            
                Other Unknown  | 
            
                5 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            Yield on circulatory roadway. | |
| 
                New London,
                CT New London Co. United States  | 
            
                Lincoln Ave. / Colver St. (41.35554, -72.11288)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Niantic,
                CT New London Co. United States  | 
            
                (Rocky Neck State Park entrance) (41.31555, -72.24149)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Bridgeport,
                CT Fairfield Co. United States  | 
            
                Soundview Dr. / Monument Dr. (41.16021, -73.18696)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Westport,
                CT Fairfield Co. United States  | 
            
                (Sherwood Island State Park entrance) / (Sherwood Island Connector) (41.11541, -73.33051)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Longmeadow,
                MA Hampden Co. United States  | 
            
                E Greenwich Rd. / Normandy Rd. (42.06791, -72.56661)  | 
            
                Other Existing  | 
            
                Uncontrolled Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Marion,
                IA Linn Co. United States  | 
            
                County Home Rd. / C Ave. Extension (42.09487, -91.64848)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2021 | https://cbs2iowa.com/news/local/county-home-road-reopens-in-linn-county-after-improvement-project | 
| 
                Marion,
                IA Linn Co. United States  | 
            
                County Home Rd. / Alburnett Rd. (42.09450, -91.61904)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 45.7200  | 
            
                Other (At-Grade) Single-Lane  |   
            2020 | Year Completed estimated (2019-2020). | 
| 
                Marion,
                IA Linn Co. United States  | 
            
                10th St. / 10th Ave. / Central Ave. (42.03629, -91.59934)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-lane w/ Traversable Central Island  |   
            2021 | https://www.cityofmarion.org/Home/Components/News/News/6547/ | 
| 
                Hanover,
                PA York Co. United States  | 
            
                E Walnut St. / Keagy Ave. (39.82267, -76.97161)  | 
            
                Other Existing  | 
            
                Uncontrolled Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Hanover,
                PA York Co. United States  | 
            
                E Walnut St. / Hollywood Ave. (39.82089, -76.97224)  | 
            
                Other Existing  | 
            
                Uncontrolled Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Rockford,
                IL Winnebago Co. United States  | 
            
                Lyford Rd. / (medical center entrance) (42.31307, -88.95526)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 60.9600  | 
            
                Other (At-Grade) Single-Lane  |   
            2018 | Yielding right-turn bypass lanes on south and east legs. Year Completed estimated (2018-2019). | 
| 
                Anacortes,
                WA Skagit Co. United States  | 
            
                32nd St. / M Ave. (48.49641, -122.61753)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | https://www.goskagit.com/anacortes/news/federally-funded-roundabout-opens-at-32nd-and-m-in-anacortes/article_481122ae-2328-11ed-bc4e-6bf692cd6133.html | 
| 
                Mansfield,
                OH Richland Co. United States  | 
            
                Mansfield-Lucas Rd. / Illinois Ave. / E Cook Rd. (40.73380, -82.48583)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | Opened August 11, 2022. https://www.richlandsource.com/business/community_development/roundabout-at-cook-illinois-mansfield-lucas-to-be-opened-thursday-at-10-a-m/article_1ff0124e-18e7-11ed-aa9f-0f857334eaa6.html | 
| 
                Elmsford,
                NY Westchester Co. United States  | 
            
                Old Saw Mill River Rd. / Grasslands Rd. (41.07631, -73.81875)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 47.2440  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            2021 | |
| 
                Hammond,
                IN Lake Co. United States  | 
            
                E Gostlin St. / Sheffield Ave. (41.63211, -87.51847)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 45.7200  | 
            
                Other (At-Grade) Single-Lane  |   
            2021 | Year Completed estimated (2021-2022). | 
| 
                Gum Spring,
                VA Louisa Co. United States  | 
            
                US 250 (Broad Street Rd.) / US 522 (Cross Country Rd.) (37.77548, -77.89690)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | |
| 
                Oljato-Monument Valley,
                UT San Juan Co. United States  | 
            
                US 163 / Monument Valley Rd. (37.00424, -110.17341)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2019 | https://www.nhonews.com/news/2018/jun/19/oljato-community-breaks-ground-roundabout-road-nav/ |