| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| Lacey,
                WA Thurston Co. United States | Vashon Dr. NE / Columbia Way NE (47.09724, -122.77000) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 26.0175 | Other (At-Grade) Single-Lane | 2005 | Opened December 2005. ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | Britton Pkwy. NE / Gateway Blvd. (47.06858, -122.78590) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 42.3012 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2007 | Opened September 2007. ICD estimated from Google Maps linework. | 
| Fruitland,
                MD Wicomico Co. United States | MD 513 Cedar Ln. / Division St. (38.32094, -75.61021) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 29.0471 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| Saint Leonard,
                MD Calvert Co. United States | Calvert Beach Rd. / MD 765 Saint Leonard Rd. (38.47316, -76.50607) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 25.2460 | Other (At-Grade) Single-Lane | 2002 | ICD estimated from Google Maps linework. | 
| Annapolis Junction,
                MD Anne Arundel Co. United States | Guilford Rd. / MD 32 WB Ramps (39.12294, -76.78472) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 32.4293 | Freeway Ramps (Grade-Separated) Single-Lane | 2002 | Bypass lanes on all legs. ICD estimated from Google Maps linework. | 
| Hampstead,
                MD Carroll Co. United States | MD 88 / MD 833 (39.60434, -76.83682) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 34.0470 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Chaptico,
                MD St. Marys Co. United States | MD 234 / MD 238 (38.36791, -76.78179) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 35.5833 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| Clarksville,
                MD Howard Co. United States | Brighton Dam Rd. / Ten Oaks Rd. (39.20491, -76.95455) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 35.1680 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Deale,
                MD Anne Arundel Co. United States | MD 256 / MD 258 (38.79327, -76.54586) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 34.4423 | Other (At-Grade) Single-Lane | 2006 | ICD estimated from Google Maps linework. | 
| Bel Air,
                MD Harford Co. United States | Constant Friendship Blvd. / BJ's (39.45546, -76.31870) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 29.5092 | Other (At-Grade) Single-Lane | 1995 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Hughesville,
                MD Charles Co. United States | MD 231 / MD 5 NB Ramps (38.53426, -76.77790) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 54.1863 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2005 | ICD estimated from Google Maps linework. | 
| Hughesville,
                MD Charles Co. United States | MD 231 / MD 5 SB Ramps (38.53381, -76.77969) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 58.8579 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2005 | ICD estimated from Google Maps linework. | 
| Odenton,
                MD Anne Arundel Co. United States | MD 175 / MD 677 / Higgins Dr. (39.07831, -76.68481) | Roundabout Existing | All-Way Yield Unknown | 5 Approaches 0 Driveways 57.9120 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2004 | Reduced from two lanes to one lane in 2010. 21442 | 
| Loveland,
                CO Larimer Co. United States | Monte Vista Dr. East / W. 22nd St. (40.41451, -105.13180) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 24.5519 | Other (At-Grade) Single-Lane | 2000 | ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Monte Vista Dr. West / W. 22nd St. (40.41449, -105.13290) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 26.3706 | Other (At-Grade) Single-Lane | 2000 | ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | New Castle Dr. / Tabernash Dr. (40.42599, -105.12010) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 24.5477 | Other (At-Grade) Single-Lane | 2000 | ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Scenic Dr. / Foothills Dr. (40.39674, -105.13522) | Other Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 24.3840 | Other (At-Grade) Single-Lane | 1998 | Painted splitter islands; unmarked pedestrian crossings along circulatory roadway. | 
| Seattle,
                WA King Co. United States | Bagley Ave. N / N 43rd St. (47.65912, -122.33260) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways | Other (At-Grade) Unknown | ||
| Loveland,
                CO Larimer Co. United States | Sculptor Dr. / Corvus Dr. (40.39647, -105.03130) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 37.2926 | Other (At-Grade) Single-Lane | 2003 | ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Tacanecy Dr. / Marcy Dr. (40.39230, -105.12140) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 29.1082 | Other (At-Grade) Single-Lane | 1995 | ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Tiger Ave. / Angora Dr. (40.37680, -105.12750) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 28.2050 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Valley Oak Dr. / Clearwater Dr. (40.44328, -105.02180) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 34.5398 | Other (At-Grade) Single-Lane | 2000 | Date estimated. Functional Class: Local ICD estimated from Google Maps linework. | 
| Parker,
                CO Douglas Co. United States | Main St. / (unknown) (39.51799, -104.75580) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 19.3480 | Other (At-Grade) Single-Lane | 2000 | ICD estimated from Google Maps linework. | 
| Grand Junction,
                CO Mesa Co. United States | Independent Ave. / Sams Club entrance (39.08170, -108.58310) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 33.3754 | Other (At-Grade) Single-Lane | 2003 | Serves commercial development parking lot. ICD estimated from Google Maps linework. | 
| Grand Junction,
                CO Mesa Co. United States | Colorado Ave. / S. 2nd St. (39.06636, -108.56950) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 25.9643 | Other (At-Grade) Single-Lane | 2002 | ICD estimated from Google Maps linework. | 
| Grand Junction,
                CO Mesa Co. United States | G Rd. / 25th Rd. (39.10636, -108.58940) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 30.5834 | Other (At-Grade) Single-Lane | 2002 | ICD estimated from Google Maps linework. | 
| Grand Junction,
                CO Mesa Co. United States | G Rd. / 24 1 / 2 Rd. (39.10635, -108.59870) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 34.2905 | Other (At-Grade) Single-Lane | 2005 | ICD estimated from Google Maps linework. | 
| Seattle,
                WA King Co. United States | Meridian Ave. N / N 43rd St. (47.65914, -122.33380) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways | Other (At-Grade) Unknown | ||
| Colorado Springs,
                CO El Paso Co. United States | University of Colorado - Colorado Springs (38.89215, -104.80190) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 36.2537 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Seattle,
                WA King Co. United States | Meridian Ave. N / N 42nd St. (47.65797, -122.33380) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways | Other (At-Grade) Unknown | ||
| Loveland,
                CO Larimer Co. United States | Crestone Dr. / Foothills Dr. (40.39717, -105.13149) | Other Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 24.3840 | Other (At-Grade) Single-Lane | 1997 | Painted splitter islands; unmarked pedestrian crossings along circulatory roadway. | 
| Greeley,
                CO Weld Co. United States | W. 29th St. / 67th Ave. (40.38995, -104.78710) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 48.2121 | Other (At-Grade) Single-Lane | 2003 | ICD estimated from Google Maps linework. | 
| Erie,
                CO Weld Co. United States | CW Bixler Blvd. / Washburn St. (40.06230, -105.05650) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 20.1096 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Erie,
                CO Weld Co. United States | Lehigh Cir. / Bonanza Dr. (40.03702, -105.04080) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 29.2612 | Other (At-Grade) Single-Lane | 2006 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Erie,
                CO Weld Co. United States | Vista Pkwy. / Mountain View Blvd. (40.00784, -105.03110) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 27.4441 | Other (At-Grade) Single-Lane | 2006 | Northbound right turn bypass lane. Functional Class: Local ICD estimated from Google Maps linework. | 
| Seattle,
                WA King Co. United States | Burke Ave. N / N 43rd St. (47.65915, -122.33500) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways | Other (At-Grade) Unknown | ||
| Seattle,
                WA King Co. United States | Burke Ave. N / N 44th St. (47.66031, -122.33500) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 16.8926 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Seattle,
                WA King Co. United States | Meridian Ave. N / N 44th St. (47.66030, -122.33370) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 20.9147 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Broomfield,
                CO Adams Co. United States | Zang St. / (parking lot #1) (39.92782, -105.13320) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 36.6350 | Other (At-Grade) Single-Lane | 2001 | Serves commercial development. ICD estimated from Google Maps linework. | 
| Broomfield,
                CO Adams Co. United States | Zang St. / (parking lot #2) (39.92641, -105.13170) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 35.7199 | Other (At-Grade) Single-Lane | 2001 | Serves commercial development. ICD estimated from Google Maps linework. | 
| Englewood,
                CO Arapahoe Co. United States | Englewood Pkwy. / S. Cherokee St. (39.65491, -104.99110) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 41.3782 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2000 | ICD estimated from Google Maps linework. | 
| Englewood,
                CO Arapahoe Co. United States | W. Sheri Ln. / Belleview Park (39.62281, -105.00620) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 42.3174 | Other (At-Grade) Single-Lane | 2001 | ICD estimated from Google Maps linework. | 
| Seattle,
                WA King Co. United States | Bagley Ave. N / N 44th St. (47.66029, -122.33260) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways | Other (At-Grade) Unknown | ||
| Applewood,
                CO Jefferson Co. United States | W. 32nd Ave. / Eldridge St. (39.76180, -105.15660) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 29.3790 | Other (At-Grade) Single-Lane | 2005 | North leg serves golf course parking lot. ICD estimated from Google Maps linework. | 
| Edmonton,
                AB Edmonton Capital Region Canada | 87 Ave. NW / 142 St. NW (53.51936, -113.56570) | Rotary Existing | Unknown Unknown | 4 Approaches 0 Driveways 73.1392 | Other (At-Grade) Multilane (2 Lane, unspecified) | ICD estimated from Google Maps linework. | |
| Camrose,
                AB Central Alberta Canada | 73 St. / 45 Ave. (53.01372, -112.86572) | Other Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.0000 | Other (At-Grade) Single-Lane | 2005 | No splitter islands. | 
| Edmonton,
                AB Edmonton Capital Region Canada | 145 St. NW / 146 St. NW / 96 Ave. NW (53.53242, -113.57270) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 26.9751 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Calgary,
                AB Calgary Region Canada | Springbank Blvd. / Springbank Dr. (51.01912, -114.20230) | Traffic Calming Circle Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.0000 | Other (At-Grade) Single-Lane | 2004 | Year Completed estimated (2002-2005). | 
| North Saanich,
                BC Capital Regional District Canada | Willington Rd. / E. Saanich Rd. (48.63520, -123.42030) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.9387 | Other (At-Grade) Single-Lane | 2005 | http://www.icbc.com/road_safety/pdf/vancouver%20island/north%20saanich.pdf ICD estimated from Google Maps linework. | 
| North Cowichan,
                BC Cowichan Valley Regional District Canada | Lakes Rd. / Beverley Rd. (48.78476, -123.68480) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 29.9034 | Other (At-Grade) Single-Lane | 2005 | ICD estimated from Google Maps linework. | 
| North Cowichan,
                BC Cowichan Valley Regional District Canada | Chemainus Rd. / Henry Rd. (48.91472, -123.71340) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.8258 | Other (At-Grade) Single-Lane | 2005 | ICD estimated from Google Maps linework. | 
| North Cowichan,
                BC Cowichan Valley Regional District Canada | Tzouhalem Rd. / Maple Bay Rd. (48.78071, -123.67160) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.1188 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| North Cowichan,
                BC Cowichan Valley Regional District Canada | Sherman Rd. / Cowichan Lake Rd. (48.79214, -123.73620) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 31.4726 | Other (At-Grade) Single-Lane | 2006 | ICD estimated from Google Maps linework. | 
| Delta,
                BC Metro Vancouver Canada | 82nd Ave. / 116th St. (49.15220, -122.90150) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 21.0911 | Other (At-Grade) Unknown | 2005 | ICD estimated from Google Maps linework. | 
| Kelowna,
                BC Central Okanogan Canada | Burtch Rd. / Byrns Rd. (49.87102, -119.46580) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 26.1717 | Other (At-Grade) Single-Lane | 2005 | ICD estimated from Google Maps linework. | 
| Kelowna,
                BC Central Okanogan Canada | Swamp Rd. / Casorso Rd. (49.84534, -119.46640) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 23.1050 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| Kelowna,
                BC Central Okanogan Canada | Benvoulin Rd. / Casorso Rd. (49.84882, -119.46910) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 36.1952 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| Surrey,
                BC Greater Vancouver Regional District Canada | King George Hwy / 14th St. (Ave.?) (49.02746, -122.77110) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.7585 | Other (At-Grade) Single-Lane | 2007 | http://www.icbc.com/road_safety/road_improve_pu/surrey.asp ICD estimated from Google Maps linework. | 
| Topeka,
                KS Shawnee Co. United States | SW 21st St. / Urish Rd. (39.02899, -95.78088) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 50.1005 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | Completed November 2008. ICD estimated from Google Maps linework. | 
| Allen,
                TX Collin Co. United States | N Allen Dr. / St. Mary Dr. (33.10674, -96.67113) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2006 | . | 
| Denton,
                TX Denton Co. United States | Wheeler Ridge Dr. / Breton Dr. (33.15462, -97.10275) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 54.8630 | Other (At-Grade) Single-Lane | 2005 | . | 
| Rowlett,
                TX Dallas Co. United States | Main St. / Coyle St. / Skyline Dr. (32.90316, -96.56289) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 41.1480 | Other (At-Grade) Single-Lane | 2006 | . | 
| Great Neck,
                NY Nassau Co. United States | Barstow Rd. / South Station Pl. (40.78735, -73.72462) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 22.6068 | Other (At-Grade) Single-Lane | 2003 | High pedestrian activitiy associated with commuter rail station below the roundabout. ICD estimated from Google Maps linework. | 
| Pemberton,
                BC Pemberton Valley Canada | Portage Rd. / Aspen Blvd. (50.32201, -122.80508) | Roundabout Existing | All-Way Yield At-grade Rail Crossing Signal/Beacon | 3 Approaches 0 Driveways 35.0000 | Other (At-Grade) Single-Lane | ||
| Vancouver,
                BC Greater Vancouver Regional District Canada | 16th Ave. / Westbrook Mall (49.25575, -123.23630) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.0940 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | On campus of University of British Columbia. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Casa Grande,
                AZ Pinal Co. United States | N. Pottebaum Ave. / E. Anna Dr. (32.88727, -111.72700) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 24.0702 | Other (At-Grade) Single-Lane | 2007 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Casa Grande,
                AZ Pinal Co. United States | N. Pottebaum Ave. / E. Manor Dr. (32.88863, -111.72680) | Traffic Calming Circle Existing | Unknown Unknown | 3 Approaches 0 Driveways 20.0582 | Other (At-Grade) Single-Lane | 2007 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Lawrence,
                KS Douglas Co. United States | E. 17th St. / New Hampshire St. (38.95364, -95.23475) | Traffic Calming Circle Existing | All-Way Yield None | 4 Approaches 0 Driveways 13.0029 | Other (At-Grade) Single-Lane | 2005 | Year Completed estimated (fuzzy aerial photos). ICD estimated from Google Maps linework. | 
| Rio Puerco,
                NM Bernalillo Co. United States | Central Ave. / I-40 EB Ramps (35.03048, -106.94750) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 68.4580 | Freeway Ramps (Grade-Separated) Single-Lane | 2008 | Owned by New Mexico DOT. Previously controlled by stop control ICD estimated from Google Maps linework. | 
| Forest Hill,
                MD Harford Co. United States | MD 23 / Commerce Rd. (39.57390, -76.37067) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 38.1000 | Other (At-Grade) Single-Lane | 2008 | On August 9, 2008 a new roundabout opened on Maryland Route 23 and an extended Commerce Drive in Forest Hill (Harford County), Maryland. It was built by a private developer to improve access to the Forest Hill Industrial Park by using Route 23, a limited access highway, rather than the current access road to Commerce Drive, Jarrettsville Road, which is primarily a residential route. | 
| Cabazon,
                CA Riverside Co. United States | Apache Trl. / I-10 EB Ramps (33.92071, -116.80680) | Roundabout Existing | All-Way Yield At-grade Rail Crossing Signals/Gates (controlling approach only) | 3 Approaches 0 Driveways 54.5087 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2008 | Opened July 11, 2008. http://www.pe.com/localnews/rivcounty/stories/PE_News_Local_S_circle21.46d763e.html. Railroad in close proximity. ICD estimated from Google Maps linework. | 
| Cabazon,
                CA Riverside Co. United States | Apache Trl. / Thunder Rd. / Seminole Dr. / I-10 WB Ramps (33.92192, -116.80610) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 79.2480 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max) | 2008 | Opened July 11, 2008. http://www.pe.com/localnews/rivcounty/stories/PE_News_Local_S_circle21.46d763e.html. | 
| Pearl City,
                HI Oahu Co. United States | Kuahaka St. / Kalauipo St. (21.41052, -157.96720) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 24.4619 | Other (At-Grade) Single-Lane | 2003 | ICD estimated from Google Maps linework. | 
| Pearl City,
                HI Oahu Co. United States | Kuahaka St. / Kaweloka St. (21.40495, -157.97320) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 17.7912 | Other (At-Grade) Single-Lane | 2003 | ICD estimated from Google Maps linework. | 
| Kailua,
                HI Oahu Co. United States | Ulupuni St. / Uluhala St. (21.37803, -157.75590) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 15.5702 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Pukalani,
                HI Maui Co. United States | Kupaoa St. / Ohiaku St. (20.82094, -156.33001) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.4320 | Other (At-Grade) Single-Lane | 2005 | |
| Lihue,
                HI Kauai Co. United States | Pikake St. / Kauila St. / Makaa St. (21.96538, -159.37974) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 41.1480 | Other (At-Grade) Single-Lane | 2006 | |
| Sacramento,
                CA Sacramento Co. United States | Rush River Dr. / Windbridge Dr. (38.48465, -121.53360) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 32.7212 | Other (At-Grade) Single-Lane | 2007 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Sacramento,
                CA Sacramento Co. United States | Silva Ranch Way / (unknown) (38.47686, -121.52680) | Traffic Calming Circle Existing | Unknown Unknown | 3 Approaches 0 Driveways 61.7094 | Other (At-Grade) Single-Lane | 2007 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Sacramento,
                CA Sacramento Co. United States | Coleman Ranch Way / (unknown) (38.47739, -121.52340) | Traffic Calming Circle Existing | Unknown Unknown | 3 Approaches 0 Driveways 139.3127 | Other (At-Grade) Single-Lane | 2007 | Functional Class: Local ICD estimated from Google Maps linework. | 
| West Fargo,
                ND Cass Co. United States | CR 17 / 52nd Ave S. (46.80409, -96.90268) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 46.5982 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Neenah,
                WI Winnebago Co. United States | Co. Hwy. PP / Jacobsen Rd. / American Dr. (44.21429, -88.47825) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.8167 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| San Diego,
                CA San Diego Co. United States | Sea Ridge Dr. / Chelsea St. (32.80875, -117.26520) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 21.0801 | Other (At-Grade) Single-Lane | 2007 | Marginal roundabout. No splitter islands. ICD estimated from Google Maps linework. | 
| West Haven,
                CT New Haven Co. United States | Rte 162 (Jones Hill Rd.) / SR 705 (Ocean Avenue) (41.23624, -72.98605) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 27.8421 | Other (At-Grade) Single-Lane | 2007 | Opened fall 2007. Connecticut DOT project. Previously controlled by one-way stop ICD estimated from Google Maps linework. | 
| Clackamas,
                OR Clackamas Co. United States | SE 172nd Ave. / SE Creekwood Rd. (45.41880, -122.48550) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 43.5928 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Creekwood Rd. is new roadway; SE 172nd Avenue is existing. ICD estimated from Google Maps linework. | 
| Billings,
                MT Yellowstone Co. United States | King Ave. / Olympic Blvd. (45.75507, -108.61360) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.1658 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | Near Kohl's retail shopping center. Previously controlled by one-way stop Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Meridian,
                ID Ada Co. United States | Pine St. / Webb Rd. (43.61220, -116.36840) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.9126 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | ICD estimated from Google Maps linework. | 
| Burnside,
                AZ Apache Co. United States | US 191 / AZ 264 (35.75473, -109.62710) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 54.8640 | Other (At-Grade) Single-Lane | 2009 | Right-turn bypass lane. Elliptical shaped. ICE = 180 ft x 160 ft. | 
| Flagstaff,
                AZ Coconino Co. United States | Dodge Ave. / Railhead Ave. (35.22522, -111.57000) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 38.0498 | Other (At-Grade) Single-Lane | 2007 | By developer. ICD estimated from Google Maps linework. | 
| Howard,
                WI Brown Co. United States | Riverdale Dr. (CTH J) / CTH RK (44.54785, -88.10120) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 37.4509 | Other (At-Grade) Single-Lane | 2011 | ICD estimated from Google Maps linework. | 
| Flagstaff,
                AZ Coconino Co. United States | Pine Cliff Dr. / Gemini Dr. (35.20808, -111.63541) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2008 | By developer. | 
| Flagstaff,
                AZ Coconino Co. United States | S Woody Mountain Rd. / W Presidio Dr. (35.18308, -111.69266) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 33.5280 | Other (At-Grade) Single-Lane | 2007 | Year Completed estimated (2006-2007). | 
| Billings,
                MT Yellowstone Co. United States | King Ave. / St. Vincent Way (45.75520, -108.62260) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.9990 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Previously controlled by two-way stop Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| Bozeman,
                MT Gallatin Co. United States | Baxter Ln. / Ferguson Ave. (45.70024, -111.09310) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.0040 | Other (At-Grade) Single-Lane | 2003 | |
| Bozeman,
                MT Gallatin Co. United States | Laurel Pkwy. / Annie St. (45.68916, -111.11383) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2003 | |
| Bozeman,
                MT Gallatin Co. United States | Laurel Pkwy. / Glenellen Dr. / Sherwood Way (45.69050, -111.11401) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.1000 | Other (At-Grade) Single-Lane | 2003 | |
| Bozeman,
                MT Gallatin Co. United States | Cascade St. / Kimball Ave. (45.68162, -111.09510) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 19.1915 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Bozeman,
                MT Gallatin Co. United States | Cascade St. / Clifden Dr. (45.68115, -111.09950) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 19.1916 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Kalispell,
                MT Flathead Co. United States | (shopping center entrance) / (parking lot) (48.23521, -114.33170) | Other Existing | Uncontrolled Unknown | 0 Approaches 0 Driveways 41.1480 | Other (At-Grade) Single-Lane | 2005 | |
| Bloomington,
                IN Monroe Co. United States | W Tapp Rd. / S Adams St. (39.13650, -86.55431) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 31.4967 | Other (At-Grade) Single-Lane | 2008 | No truck apron and wide circulatory roadway. ICD estimated from Google Maps linework. |