| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| Windsor Mill,
                MD Baltimore Co. United States | Lord Baltimore Dr. / Wildlife Dr. (39.31993, -76.75019) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 14.7833 | Other (At-Grade) Single-Lane | 1998 | Year Completed estimated (1993-2002). ICD estimated from Google Maps linework. | 
| Windsor Mill,
                MD Baltimore Co. United States | Lord Baltimore Dr. / Glen Spring Rd. / Kettle Ct. (39.31750, -76.75152) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 17.5558 | Other (At-Grade) Single-Lane | 1998 | Year Completed estimated (1993-2002). ICD estimated from Google Maps linework. | 
| Queenstown,
                MD Queen Anne's Co. United States | Nesbit Rd. / Shoreway Dr. (38.96600, -76.18291) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | 2011 | Fourth leg stubbed. | 
| Cumberland,
                MD Allegany Co. United States | US 220 / I-68 EB Ramps (39.64367, -78.79099) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 34.0276 | Freeway Ramps (Grade-Separated) Single-Lane | 2012 | Built to facilitate U-turns. Teardrop shape. ICD estimated from Google Maps linework. | 
| Chestertown,
                MD Kent Co. United States | MD 20 / MD 291 / (parking lot) (39.21863, -76.07913) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 47.1899 | Other (At-Grade) Single-Lane | 2015 | ICD estimated from Google Maps linework. | 
| Oxon Hill,
                MD Prince George's Co. United States | Oxon Hill Rd. / (parking lots) (38.79166, -77.00416) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 26.0650 | Other (At-Grade) Single-Lane | 2015 | ICD estimated from Google Maps linework. | 
| Oxon Hill,
                MD Prince George's Co. United States | Oxen Hill Rd. / Cedar Ridge Dr. / Panorama Dr. (38.78452, -77.00597) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 34.4465 | Other (At-Grade) Single-Lane | 2015 | ICD estimated from Google Maps linework. | 
| Fort Washington,
                MD Prince George's Co. United States | Oxon Hill Rd. / Kerby Hill Rd. (38.77951, -77.00648) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 34.4490 | Other (At-Grade) Single-Lane | 2015 | ICD estimated from Google Maps linework. | 
| Jessup,
                MD Anne Arundel Co. United States | National Business Pkwy. / Brock Bridge Rd. (39.14025, -76.76395) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 44.4636 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2013 | ICD estimated from Google Maps linework. | 
| Hanover,
                MD Anne Arundel Co. United States | Watts Ave. / Clark Rd. (39.15138, -76.72638) | Roundabout Existing | All-Way Yield None | 2 Approaches 0 Driveways 25.9330 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Hanover,
                MD Anne Arundel Co. United States | Ridge Rd. / Corporate Center Dr. (39.19204, -76.70216) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 31.4719 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Catonsville,
                MD Baltimore Co. United States | UMBC Blvd. / Research Park Dr. (39.24874, -76.71580) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 44.3950 | Other (At-Grade) Single-Lane | 2015 | Elliptical shape. ICD estimated from Google Maps linework. | 
| Bel Air,
                MD Harford Co. United States | Tollgate Rd. / Macphail Rd. (39.51959, -76.35208) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 19.8120 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2012 | |
| Friendship,
                MD Anne Arundel Co. United States | Solomons Island Rd. (MD 2) / Friendship Rd. (MD 261) / Sansbury Rd. (38.73656, -76.59379) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.0594 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Laurel,
                MD Howard Co. United States | Old Scaggsville Rd. / High Ridge Rd. / Running Deer Dr. (39.11815, -76.86396) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.7985 | Other (At-Grade) Single-Lane | 2015 | ICD estimated from Google Maps linework. | 
| Columbia,
                MD Howard Co. United States | Harpers Farm Rd. / Campus Dr. (39.21534, -76.88023) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 31.4614 | Other (At-Grade) Single-Lane | 2003 | Originally had 4 legs. ICD estimated from Google Maps linework. | 
| Ellicott City,
                MD Howard Co. United States | College Ave. / Bending Sky Way (39.25754, -76.79122) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 26.8186 | Other (At-Grade) Single-Lane | 2012 | ICD estimated from Google Maps linework. | 
| Aberdeen,
                MD Harford Co. United States | Philadelphia Rd. (MD 7) / Ashford Dr.. / Panell Dr. (39.48593, -76.23873) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.4792 | Other (At-Grade) Single-Lane | 2012 | ICD estimated from Google Maps linework. | 
| Aberdeen,
                MD Harford Co. United States | Tralee Cir. / Ashford Dr. (39.48395, -76.23831) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 25.8100 | Other (At-Grade) Single-Lane | 2003 | ICD estimated from Google Maps linework. | 
| Aberdeen,
                MD Harford Co. United States | Burnt Hill Trl. / Atlas Cedar Way / Thistle Hill Dr. (39.49324, -76.22236) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.1799 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Aberdeen,
                MD Harford Co. United States | Burnt HIll Trl. / Witch Hazel Way / Limestone Ct. (39.49486, -76.22046) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.1791 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Aberdeen,
                MD Harford Co. United States | Thistle Hill Dr. / Witchhazel Way (39.49563, -76.22415) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 31.3355 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Aberdeen,
                MD Harford Co. United States | Burnt Hill Trl. / Holly Oak Cir. / Woods Line Dr. (39.49605, -76.21740) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.8055 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| The Dalles,
                OR Wasco Co. United States | E 2nd St. / E 3rd St. / Brewery Grade (45.59719, -121.17291) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 36.7695 | Other (At-Grade) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| Conway,
                AR Faulkner Co. United States | S Amity Rd. / (parking lot access) (35.06506, -92.41518) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 36.1697 | Other (At-Grade) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| Conway,
                AR Faulkner Co. United States | E Siebenmorgan Rd. / N Museum Rd. (35.09867, -92.41881) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 46.9035 | Other (At-Grade) Single-Lane | 2011 | ICD estimated from Google Maps linework. | 
| Conway,
                AR Faulkner Co. United States | Washington Ave. / Fleming St. / Clifton St. (35.10640, -92.44487) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 36.1513 | Other (At-Grade) Single-Lane | 2013 | ICD estimated from Google Maps linework. | 
| Conway,
                AR Faulkner Co. United States | Amity Rd. / Elsinger Blvd. (35.08456, -92.41419) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 49.8436 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2017 | ICD estimated from Google Maps linework. | 
| Conway,
                AR Faulkner Co. United States | E 6th St. / Central Landing Blvd. (35.08420, -92.42236) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 53.7531 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2017 | ICD estimated from Google Maps linework. | 
| Conway,
                AR Faulkner Co. United States | E 6th St. / 1st Ave. / Bruce St. (35.08422, -92.42807) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.0705 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2017 | ICD estimated from Google Maps linework. | 
| Saint George,
                UT Washington Co. United States | Airport Pkwy. / Desert Canyons Pkwy. (37.02456, -113.50841) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 38.1410 | Other (At-Grade) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| Conway,
                AR Faulkner Co. United States | Bruce St. / (unknown) (35.08250, -92.42927) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 44.1960 | Other (At-Grade) Single-Lane | 2017 | |
| Palm Coast,
                FL Flagler Co. United States | Matanzas Woods Pkwy. / (unknown) (29.60334, -81.28551) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 41.5371 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2010 | Concentric circulatory roadway striping, posted speed limits of 15 mph in circulatory roadway. Year Completed estimated (2008-2010). ICD estimated from Google Maps linework. | 
| Adams,
                MA Berkshire Co. United States | Columbia St. (Rte 8) / Renfrew St. / Friend St. (42.63704, -73.11300) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.7517 | Other (At-Grade) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| Seabrook,
                SC Beaufort Co. United States | US 21 (Trask Pkwy.) / US 17 SB Ramps (32.60212, -80.75961) | Roundabout Existing | All-Way Yield None | 2 Approaches 0 Driveways 41.2518 | Freeway Ramps (Grade-Separated) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Baton Rouge,
                LA East Baton Rouge Par. United States | Dalrymple Dr. / Isaac Cline Dr. / W Lakeshore Dr. (30.41647, -91.17170) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 24.7188 | Other (At-Grade) Single-Lane | 2013 | ICD estimated from Google Maps linework. | 
| Newport,
                KY Campbell Co. United States | Louie B Nunn Dr. / University Dr. (39.03333, -84.45999) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.6874 | Other (At-Grade) Single-Lane | 2012 | ICD estimated from Google Maps linework. | 
| Highland Heights,
                KY Campbell Co. United States | Martha Layne Collins Blvd. / Johns Hill Rd. / University Dr. / Knollwood Dr. (39.02729, -84.46077) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 43.6071 | Other (At-Grade) Single-Lane | 2012 | ICD estimated from Google Maps linework. | 
| 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. | 
| Springboro,
                OH Warren Co. United States | Settlers Walk Blvd. / Remick Blvd. / Stolle Dr. (39.57782, -84.21781) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 64.4378 | Other (At-Grade) Single-Lane | 1998 | ICD estimated from Google Maps linework. | 
| Miamisburg,
                OH Montgomery Co. United States | Austin W Blvd. / Automation Way (39.59850, -84.24378) | Roundabout Existing | All-Way Yield None | 2 Approaches 0 Driveways 44.1728 | Other (At-Grade) Single-Lane | 2011 | ICD estimated from Google Maps linework. | 
| Kettering,
                OH Montgomery Co. United States | Forrer Blvd. / Madison St. (39.71565, -84.14854) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 51.4476 | Other (At-Grade) Multilane (2 Lane, unspecified) | 1996 | ICD estimated from Google Maps linework. | 
| Huber Heights,
                OH Miami Co. United States | Carriage Trails Pkwy. / Senna St. (39.89143, -84.12441) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 47.6508 | Other (At-Grade) Single-Lane | 2004 | Year Completed estimated (2002-2004). Side street did not open to traffic until 2009. ICD estimated from Google Maps linework. | 
| Tipp City,
                OH Miami Co. United States | Carriage Trails Pkwy. / Lakeside St. (39.89100, -84.11903) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 51.3166 | Other (At-Grade) Single-Lane | 2005 | Side street did not open to traffic until 2013. Has pedestrian underpass. ICD estimated from Google Maps linework. | 
| Huber Heights,
                OH Miami Co. United States | Carriage Trails Pkwy. / Forestedge St. (39.89052, -84.11278) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 46.7351 | Other (At-Grade) Single-Lane | 2005 | Side street did not open to traffic until 2005. ICD estimated from Google Maps linework. | 
| Huber Heights,
                OH Miami Co. United States | Carriage Trails Pkwy (39.88634, -84.10037) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 47.6544 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| West Chester Township,
                OH Butler Co. United States | Centre Pointe Dr. / West Chester Township Centre Dr. (39.32694, -84.43063) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 37.8784 | Other (At-Grade) Single-Lane | 2006 | ICD estimated from Google Maps linework. | 
| West Chester Township,
                OH Butler Co. United States | Lakota Dr. W / Eagle Ridge Dr. / Eagle Ridge Ct. (39.33111, -84.42783) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.5619 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| West Chester Township,
                OH Butler Co. United States | Dudley Dr. / University Dr. (39.35646, -84.36877) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 30.4746 | Other (At-Grade) Single-Lane | 2005 | Painted splitter island on northwest leg. ICD estimated from Google Maps linework. | 
| 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. | 
| 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. | 
| 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. | 
| St. Clair Township,
                OH Butler Co. United States | Hamilton Trenton Rd. / Riverside Dr. / Busenbark Rd. / (parking lot) (39.46565, -84.48671) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.7252 | Other (At-Grade) Single-Lane | 2011 | ICD estimated from Google Maps linework. | 
| St. Clair Township,
                OH Butler Co. United States | Jacksonburg Rd. / Morganthaler Rd. (39.46012, -84.52261) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.0399 | Other (At-Grade) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| St. Clair Township,
                OH Butler Co. United States | Eaton Rd. / Beissinger Rd. (39.44294, -84.58301) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6602 | Other (At-Grade) Single-Lane | 2015 | ICD estimated from Google Maps linework. | 
| Ross Township,
                OH Butler Co. United States | SR 748 (Millville Shandon Rd.) / Layhigh Rd. (39.36255, -84.69648) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.4761 | Other (At-Grade) Single-Lane | 2015 | ICD estimated from Google Maps linework. | 
| Mason,
                OH Warren Co. United States | Mason Montgomery Rd. / Bethany Rd. (39.37924, -84.30723) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 49.8513 | Other (At-Grade) Single-Lane | 2015 | Right turn lanes on all approaches, expandable to 2 lanes. ICD estimated from Google Maps linework. | 
| Perrysburg,
                OH Wood Co. United States | SR 199 (McCutchenville Pike) / Roachton Rd. (41.52196, -83.60449) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.0852 | Other (At-Grade) Single-Lane | 2016 | WOO-199-27.97 PID 96355 E131324 ICD estimated from Google Maps linework. | 
| Deerfield Township,
                OH Warren Co. United States | Fields Ertel Rd. / N Lebanon Rd. / Columbia Rd. (39.28999, -84.28242) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 28.6549 | Other (At-Grade) Single-Lane | 2017 | ICD estimated from Google Maps linework. | 
| Mason,
                OH Warren Co. United States | Socialville-Foster Rd. / Innovation Way (39.32155, -84.29039) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 44.3489 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2016 | ICD estimated from Google Maps linework. | 
| Middletown,
                OH Warren Co. United States | Union Rd. / Greentree Rd. (39.46532, -84.31978) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 36.8813 | Other (At-Grade) Single-Lane | 2017 | ICD estimated from Google Maps linework. | 
| Cynthiana,
                KY Harrison Co. United States | US 27 / US 62 (38.36872, -84.31978) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.2013 | Other (At-Grade) Single-Lane | 2012 | Year Completed estimated (2010-2014). ICD estimated from Google Maps linework. | 
| Springfield,
                KY Washington Co. United States | Bardstown Rd. / US 150 Business (37.70884, -85.25774) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 29.2909 | Other (At-Grade) Single-Lane | 2012 | Year Completed estimated (2010-2013). ICD estimated from Google Maps linework. | 
| Cincinnati,
                OH Hamilton Co. United States | Roebling Way / Theodore M Berry Way / Walnut St. (39.09641, -84.51076) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 16.6842 | Other (At-Grade) Single-Lane | 2013 | ICD estimated from Google Maps linework. | 
| Terre Haute,
                IN Vigo Co. United States | S Sycamore Terrace St. / New Margaret Dr. (39.43997, -87.34235) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 47.0408 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2011 | 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 | |
| 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. | 
| Terre Haute,
                IN Vigo Co. United States | E Haythorne Ave. / N Fruitridge Ave. (39.52062, -87.36024) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 16.5834 | Other (At-Grade) Single-Lane | 2015 | ICD estimated from Google Maps linework. | 
| Terre Haute,
                IN Vigo Co. United States | IN-42 / Swalls Dr. (39.46157, -87.28667) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.8833 | Other (At-Grade) Single-Lane | 2013 | Year Completed estimated (2011-2014). ICD estimated from Google Maps linework. | 
| Cary,
                NC Wake Co. United States | Parkman Grant Dr. / Beacon Falls Ct. (35.81964, -78.88697) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.0531 | Other (At-Grade) Single-Lane | 2005 | ICD estimated from Google Maps linework. | 
| Cary,
                NC Wake Co. United States | Beacon Falls Ct. / Cameron Pond Dr. (35.81996, -78.88966) | Roundabout Existing | All-Way Yield None | 4 Approaches 1 Driveways 28.0846 | Other (At-Grade) Single-Lane | 2005 | ICD estimated from Google Maps linework. | 
| Woodlake,
                CA Tulare Co. United States | Hwy 216 / Hwy 245 (36.41367, -119.09891) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.7564 | Other (At-Grade) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| Oakland,
                NE Burt Co. United States | US 77 / SR 32 (41.82428, -96.46580) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 48.9503 | Other (At-Grade) Single-Lane | 2015 | ICD estimated from Google Maps linework. | 
| Mansfield,
                OH Richland Co. United States | Middle Bellville Rd. / Straub Rd. (40.71063, -82.53678) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.3074 | Other (At-Grade) Single-Lane | 2012 | ICD estimated from Google Maps linework. | 
| Forest Grove,
                OR Washington Co. United States | OR Hwy 47 / Verboort Rd. / Purdin Rd. (45.54784, -123.10578) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 48.5115 | Other (At-Grade) Single-Lane | 2017 | ICD estimated from Google Maps linework. | 
| Forest Grove,
                OR Washington Co. United States | OR Hwy 47 / David Hill Rd. (45.53898, -123.10728) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 50.1922 | Other (At-Grade) Single-Lane | 2017 | ICD estimated from Google Maps linework. | 
| Hillsboro,
                OR Washington Co. United States | NW Jackson School Rd. / NW Scotch Church Rd. / NW Meek Rd. (45.57257, -122.96991) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 48.4901 | Other (At-Grade) Single-Lane | 2017 | ICD estimated from Google Maps linework. | 
| Hillsboro,
                OR Washington Co. United States | NE Veterans Dr. / NE 34th Ave. (45.52864, -122.94667) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.9575 | Other (At-Grade) Single-Lane | 2012 | ICD estimated from Google Maps linework. | 
| Hillsboro,
                OR Washington Co. United States | NE Butler St. / NE 65th Ave. (45.53838, -122.91368) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.1349 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2014 | ICD estimated from Google Maps linework. | 
| Earlysville,
                VA Albemarle Co. United States | VA 606 (Dickerson Rd) / CR 743 (Earlysville Rd) (38.12790, -78.46013) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 46.9750 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Prince George,
                VA Prince George Co. United States | VA 106 (Courthouse Rd) / VA 634 (Allin Rd) (37.22338, -77.29979) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 38.0409 | Other (At-Grade) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| Berryville,
                VA Clarke Co. United States | SR 636 (Westwood Rd) / SR 7 Business (W Main St) (39.16190, -77.99695) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 31.4854 | Other (At-Grade) Single-Lane | 2013 | ICD estimated from Google Maps linework. | 
| Chantilly,
                VA Fairfax Co. United States | VA 620 (Braddock Rd.) / VA 609 (Pleasant Valley Rd.) (38.88170, -77.48570) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.1024 | Other (At-Grade) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| Petersburg,
                VA Dinwiddie Co. United States | SR 600 (Westgate Dr) / SR 226 (Cox Rd) (37.21434, -77.45870) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 46.6057 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2017 | ICD estimated from Google Maps linework. | 
| Lincoln,
                NE Lancaster Co. United States | Yankee Woods Dr. / S 78th St. (40.72171, -96.61358) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 75.1288 | Other (At-Grade) Single-Lane | 2011 | ICD estimated from Google Maps linework. | 
| Lincoln,
                NE Lancaster Co. United States | Yankee Woods Dr. / (unknown) (40.72289, -96.60408) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.8266 | Other (At-Grade) Single-Lane | 2017 | ICD estimated from Google Maps linework. | 
| Lincoln,
                NE Lancaster Co. United States | Yankee Woods Dr. / (unknown 2) (40.72556, -96.60085) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.5404 | Other (At-Grade) Single-Lane | 2017 | ICD estimated from Google Maps linework. | 
| Keizer,
                OR Marion Co. United States | Verda Ln NE / Chemawa Rd NE (44.99750, -123.01251) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 28.7149 | Other (At-Grade) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| Idaho Falls,
                ID Bonneville Co. United States | S Utah Ave. / Bridgeport Dr. (43.48859, -112.04979) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 47.6574 | Other (At-Grade) Single-Lane | 2002 | Eagle Rock Fountain in center island. Roundabout was partially reconstructed with geometric improvements in 2014. Original construction was in 2002. ICD estimated from Google Maps linework. | 
| Great Falls,
                MT Cascade Co. United States | Division Rd. / Smelter Ave. NW (47.52454, -111.31037) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 37.0990 | Other (At-Grade) Single-Lane | 2013 | ICD estimated from Google Maps linework. | 
| Idaho Falls,
                ID Bonneville Co. United States | E Lincoln Rd. / E Hitt Rd. (N 25th) (43.51143, -111.98410) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 51.8160 | Other (At-Grade) Multilane (2 Lane, 2x2 max) | 2001 | Right-turn-only lane on west leg. Year Completed estimated (1992-2003). Converted from single-lane to multilane in 2018. 21442 | 
| Boise,
                ID Ada Co. United States | N 36th St. / W Hil Rd. / W Catalpa Dr. (43.65542, -116.23333) | Roundabout Existing | All-Way Yield Unknown | 6 Approaches 0 Driveways 74.3128 | Other (At-Grade) Single-Lane | 2016 | Dogbone shape. ICD estimated from Google Maps linework. | 
| West Lafayette,
                IN Tippecanoe Co. United States | S Martin Jischke Dr. / Harrison St. / Nimitz Dr. (40.42043, -86.92193) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 55.4643 | Other (At-Grade) Single-Lane | 2011 | On Purdue University campus. Year Completed estimated (2010-2012). ICD estimated from Google Maps linework. | 
| Spokane Valley,
                WA Spokane Co. United States | E Broadway Ave. / N Flora Rd. (47.66424, -117.17510) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 24.1305 | Other (At-Grade) Single-Lane | 2010 | Year Completed estimated (2009-2011). ICD estimated from Google Maps linework. | 
| Liberty Lake,
                WA Spokane Co. United States | E Mission Ave. / N Molter Rd. (47.67131, -117.08964) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 31.3654 | Other (At-Grade) Single-Lane | 2017 | ICD estimated from Google Maps linework. | 
| Hershey,
                PA Dauphin Co. United States | SR 322 / Homestead Ln (40.27526, -76.63332) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.4484 | Other (At-Grade) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| Hershey,
                PA Dauphin Co. United States | SR 322 / Meadow Ln (40.27467, -76.62551) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.0936 | Other (At-Grade) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| Lower Southampton Township,
                PA Bucks Co. United States | Bridgetown Pike / W Maple (SR 0213) / Bridgetown Pike (SR 2010) (40.17417, -74.96831) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways | Other (At-Grade) Single-Lane | 2016 | |
| New Stanton,
                PA Westmoreland Co. United States | Bair Blvd / Rachel Dr (40.21929, -79.61572) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | 2016 | Year completed might be 2017. | 
| New Stanton,
                PA Westmoreland Co. United States | I-70 / Bair Blvd (40.21722, -79.61435) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 43.7756 | Freeway Ramps (Grade-Separated) Single-Lane | 2016 | Year Completed could be 2017. ICD estimated from Google Maps linework. |