| 
                City, 
                State County Country  | 
            
                Intersection (Lat, Lng)  | 
            
                Type Status  | 
            Control Type / Other Control Type | Approaches / Driveways / ICD (m) | 
                Functional Class /  LaneType  | 
            Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| 
                Liberty,
                MO Clay Co. United States  | 
            
                Liberty Dr / Flintrock Rd (39.22231, -94.46337)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 40.7108  | 
            
                Other (At-Grade) Single-Lane  |   
            2013 | ICD estimated from Google Maps linework. | 
| 
                Kansas City,
                MO Clay Co. United States  | 
            
                Searcy Creek Pkwy. / NE Shoal Creek Pkwy. (39.22229, -94.50338)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 77.7240  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2008 | |
| 
                Grass Valley,
                CA Nevada Co. United States  | 
            
                E. Main St. / Idaho-Maryland Rd. / SR 20 WB Ramps (39.22168, -121.05380)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 39.6240  | 
            
                Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)  |   
            2008 | Yield-controlled right-turn bypass lane on north leg with very shallow angle. Left-turn-only lane on east leg. | 
| 
                Woodbine,
                NJ Cape May Co. United States  | 
            
                CR 610 (Dennisville-Petersburg Rd.) / CR 550 (Dehlisch Ave. / Woodbine-Ocean View Rd.) (39.22105, -74.77919)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 45.7200  | 
            
                Other (At-Grade) Single-Lane  |   
            2020 | |
| 
                Columbia,
                MD Howard Co. United States  | 
            
                Vantage Point Rd. (39.22074, -76.85392)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Clarksburg,
                MD Montgomery Co. United States  | 
            
                Cabin Branch Ave. / Skimmer St. (39.22020, -77.28435)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 45.7200  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x2 max)  |   
            2016 | Year Completed estimated (2015-2017). Striping added 2019-2021. | 
| 
                Kansas City,
                MO Platte Co. United States  | 
            
                MO-45 (Tom Watson Pkwy.) / NW Union Chapel Rd. (MO K) (39.21999, -94.73524)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 55.5165  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2010 | 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. | 
| 
                Kansas City,
                MO Platte Co. United States  | 
            
                NW Union Chapel Rd. / NW Brink-Meyer Rd. (39.21830, -94.73579)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 28.6842  | 
            
                Other (At-Grade) Single-Lane  |   
            2011 | ICD estimated from Google Maps linework. | 
| 
                Clarksburg,
                MD Montgomery Co. United States  | 
            
                Little Seneca Pkwy. / Cabin Branch Ave. (39.21654, -77.28310)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 45.7200  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x2 max)  |   
            2016 | Year Completed estimated (2016-2017). Striping added 2019-2021. | 
| 
                Clarksburg,
                MD Montgomery Co. United States  | 
            
                Broadway Ave. / Little Seneca Pkwy. (39.21646, -77.28540)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways 45.7200  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x2 max)  |   
            2016 | Year Completed estimated (2015-2017). Striping added 2019-2021. | 
| 
                Columbia,
                MD Howard Co. United States  | 
            
                Golden Straw Ln. / Davis Rd. (39.21597, -76.81084)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways  | 
            
                Other (At-Grade) Single-lane w/ Traversable Central Island  |   
            2000 | Completed April 28, 2000. Pedestrian ramps into circulatory roadway. | 
| 
                Cagliari,
                Sardinia Cagliari Italy  | 
            
                Via Lungo Saline / Via dell'Idrovora (39.21551, 9.17084)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            ||
| 
                Clarksville,
                MD Howard Co. United States  | 
            
                Highland Rd. / Triadelphia Mill Rd. (39.21551, -76.97698)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 36.5760  | 
            
                Other (At-Grade) Single-Lane  |   
            2008 | |
| 
                Sycamore Township,
                OH Hamilton Co. United States  | 
            
                Plainfield Rd. / Sycamore Rd. (39.21534, -84.39192)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways 37.9388  | 
            
                Other (At-Grade) Single-Lane  |   
            2019 | 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. | 
| 
                Columbia,
                MD Howard Co. United States  | 
            
                Golden Straw Ln. / Long Meadow Ct. (39.21441, -76.81085)  | 
            
                Traffic Calming Circle Existing  | 
            
                Other None  | 
            
                3 Approaches 0 Driveways 99.0123  | 
            
                Other (At-Grade) Single-Lane  |   
            2000 | Yield control only on west leg. ICD estimated from Google Maps linework. | 
| 
                Clarksburg,
                MD Montgomery Co. United States  | 
            
                Clarksburg Rd. / W Old Baltimore Rd. (39.21396, -77.29731)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 42.6720  | 
            
                Other (At-Grade) Single-Lane  |   
            2019 | Year Completed estimated (2019-2020). | 
| 
                Gladstone,
                MO Clay Co. United States  | 
            
                 NE Antioch Rd. / NE Pleasant Valley Rd. (39.21369, -94.53468)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways 34.2382  | 
            
                Other (At-Grade) Single-Lane  |   
            2018 | https://www.linecreekloudmouth.com/blog/street-improvements/ ICD estimated from Google Maps linework. | 
| 
                Parkville,
                MO Platte Co. United States  | 
            
                National Dr. / Ridge Rd. (39.21333, -94.70781)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 49.9696  | 
            
                Other (At-Grade) Single-Lane  |   
            Functional Class: Local ICD estimated from Google Maps linework. | |
| 
                Columbia,
                MD Howard Co. United States  | 
            
                Oakland Mills Rd. / MD 175 SB Ramps / (unknown) (39.21308, -76.83456)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 36.5760  | 
            
                Freeway Ramps (Grade-Separated) Single-Lane  |   
            2017 | Year Completed estimated (2016-2017). | 
| 
                Columbia,
                MD Howard Co. United States  | 
            
                Charter Dr. / (parking) (39.21273, -76.88310)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 27.4320  | 
            
                Other (At-Grade) Single-Lane  |   
            2013 | Converted from cul-de-sac. Year Completed estimated (2011-2014). | 
| 
                Ellicott City,
                MD Howard Co. United States  | 
            
                Snowden River Pkwy. / MD 100 WB Ramps (39.21233, -76.79544)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Metering Signal  | 
            
                3 Approaches 0 Driveways 25.9105  | 
            
                Freeway Ramps (Grade-Separated) Single-Lane  |   
            1998 | Opened November 1998. Metering signal on Snowden River Pkwy approach. ICD estimated from Google Maps linework. | 
| 
                Columbia,
                MD Howard Co. United States  | 
            
                Banneker Rd. / Cul-de-sac (39.21141, -76.87041)  | 
            
                Traffic Calming Circle Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 17.5824  | 
            
                Other (At-Grade) Single-Lane  |   
            Functional Class: Local ICD estimated from Google Maps linework. | |
| 
                Elkridge,
                MD Howard Co. United States  | 
            
                Elkridge Crossing Way / Doctor Patel Dr. (39.21091, -76.72512)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 31.4634  | 
            
                Other (At-Grade) Single-Lane  |   
            2007 | East leg stubbed for future. ICD estimated from Google Maps linework. | 
| 
                Manhattan,
                KS Riley Co. United States  | 
            
                Gary Ave. / Candlewood Dr. (39.21087, -96.61885)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 21.2841  | 
            
                Other (At-Grade) Single-Lane  |   
            1997 | Considered to be the First Modern Roundabout in the State of Kansas. Previously controlled by two-way stop Functional Class: Collector ICD estimated from Google Maps linework. | 
| 
                Elkridge,
                MD Howard Co. United States  | 
            
                Toomey Ln. / Fairlee Rd. (39.21083, -76.71160)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 2 Driveways 27.4320  | 
            
                Other (At-Grade) Single-Lane  |   
            2002 | |
| 
                Snowmass Village,
                CO Pitkin Co. United States  | 
            
                Brush Creek Rd. / Wood Rd. / Kearns Rd. (39.21053, -106.94725)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 27.7620  | 
            
                Other (At-Grade) Single-Lane  |   
            2016 | Right-turn bypass lane on south leg. ICD estimated from Google Maps linework. | 
| 
                Parkville,
                MO Platte Co. United States  | 
            
                MO 45 (Tom Watson Pkwy.) / National Dr. (39.21016, -94.70027)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 48.1210  | 
            
                Other (At-Grade) Single-Lane  |   
            2000 | Functional Class: Arterial ICD estimated from Google Maps linework. | 
| 
                Snowmass Village,
                CO Pitkin Co. United States  | 
            
                Wood Rd. / Carriage Way (39.21000, -106.94756)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways 40.7179  | 
            
                Other (At-Grade) Single-lane w/ Traversable Central Island  |   
            2016 | ICD estimated from Google Maps linework. | 
| 
                Kansas City,
                MO Platte Co. United States  | 
            
                Lewis St. / (parking access) (39.20966, -94.68484)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 21.2845  | 
            
                Other (At-Grade) Single-Lane  |   
            2005 | ICD estimated from Google Maps linework. | 
| 
                Columbia,
                MD Howard Co. United States  | 
            
                Trotter Rd. / South Wind Cir. (39.20956, -76.91891)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 23.1353  | 
            
                Other (At-Grade) Single-Lane  |   
            1997 | Functional Class: Collector. Year Completed estimated (1993-2001). ICD estimated from Google Maps linework. | 
| 
                Elkridge,
                MD Howard Co. United States  | 
            
                Toomey Ln. / Clements Ln. (39.20950, -76.71291)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                2 Approaches 4 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            No splitter islands. | |
| 
                Germantown,
                MD Montgomery Co. United States  | 
            
                Milestone Manor Ln. / Manor View Cir. / Milestone Manor Ct. (39.20854, -77.24868)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Ellicott City,
                MD Howard Co. United States  | 
            
                MD 103 / MD 100 WB Ramps (39.20846, -76.78294)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 33.3154  | 
            
                Freeway Ramps (Grade-Separated) Single-Lane  |   
            1998 | Opened November 1998. ICD estimated from Google Maps linework. | 
| 
                Columbus,
                IN Bartholomew Co. United States  | 
            
                11th St. / Lindsey St. / Brown St. (39.20836, -85.92443)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 44.4206  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2008 | At-grade rail crossing on west leg (flashers, no gates). ICD estimated from Google Maps linework. | 
| 
                Kansas City,
                MO Platte Co. United States  | 
            
                NW 62nd Terrace / NW Prairie View Rd. / N Chatham Ave. (39.20831, -94.64319)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 48.7680  | 
            
                Freeway Ramps (Grade-Separated) Single-Lane  |   
            2021 | https://www.kcmo.gov/Home/Components/FacilityDirectory/FacilityDirectory/95/360 | 
| 
                Kansas City,
                MO Platte Co. United States  | 
            
                N Nevada Ave. / NW 62nd Pl. (39.20830, -94.74611)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Columbia,
                MD Howard Co. United States  | 
            
                Oakland Mills Rd. / Old Montgomery Rd. (39.20788, -76.83157)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 38.1000  | 
            
                Other (At-Grade) Single-Lane  |   
            2017 | |
| 
                Ellicott City,
                MD Howard Co. United States  | 
            
                MD 103 / MD 100 EB Ramps (39.20733, -76.78243)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 30.5396  | 
            
                Freeway Ramps (Grade-Separated) Single-Lane  |   
            1998 | Opened November 1998. ICD estimated from Google Maps linework. | 
| 
                Claycomo,
                MO Clay Co. United States  | 
            
                Ford Motor Plant No 4 Rd. / (parking) (39.20602, -94.47845)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 45.7200  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2013 | Year Completed estimated (2012-2013). Reconfiguration of factory entrance and parking circulation. | 
| 
                Germantown,
                MD Montgomery Co. United States  | 
            
                Milestone Manor Ln. / Stardrift Dr. (39.20560, -77.25039)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Columbia,
                MD Howard Co. United States  | 
            
                Tamar Dr. / Old Montgomery Rd. (39.20533, -76.82822)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 30.4800  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | https://www.howardcountymd.gov/News090122c | 
| 
                Germantown,
                MD Montgomery Co. United States  | 
            
                Milestone Manor Ln. / Royal Crown Dr. (39.20518, -77.25877)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Cagliari,
                Sardinia Cagliari Italy  | 
            
                Viale Armando Diaz / Via Campioni d'Italia 1969-70 / Via dei Salinieri / Via Generale Stefano Cagna / Via della Pineta (39.20491, 9.13802)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                5 Approaches 0 Driveways  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            ||
| 
                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. | 
| 
                Germantown,
                MD Montgomery Co. United States  | 
            
                Milestone Manor Ln. / Emerald Dr. (39.20479, -77.25262)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Germantown,
                MD Montgomery Co. United States  | 
            
                Crystal Rock Dr. / Century Blvd. (39.20326, -77.27356)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 48.7680  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x2 max)  |   
            2015 | Striping added 2019-2021. Inconsistent lane use markings between entry and circulatory roadway. | 
| 
                Parkville,
                MO Platte Co. United States  | 
            
                N Nevada Ave. / Thousand Oaks Pl. (39.20318, -94.74726)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            ||
| 
                Winchester,
                VA Frederick Co. United States  | 
            
                Campus Blvd. / SR 37 SB Ramps (39.20215, -78.19348)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 41.1480  | 
            
                Freeway Ramps (Grade-Separated) Single-Lane  |   
            2015 | Right-turn merging bypass lane on east leg. Truck apron much wider than circulatory roadway. Year Completed estimated (2013-2017). | 
| 
                Cagliari,
                Sardinia Cagliari Italy  | 
            
                Viale Poetto / Via Campioni d'Italia 1969-70 / Via Amerigo Vespucci / Viale San Bartolomeo (39.20178, 9.14142)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways  | 
            
                Unknown Multilane (2 Lane, 2x1 max)  |   
            Via Amerigo Vespucci is one-way entering; Viale San Bartolomeo is one-way exiting. | |
| 
                Manhattan,
                KS Riley Co. United States  | 
            
                Kimball Ave. / Grand Mere Pkwy. (39.20168, -96.63786)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 32.3931  | 
            
                Other (At-Grade) Single-Lane  |   
            2000 | Completed 3/2000. Built as part of new Colbert Hills Golf Course. Fatal crash January 31, 2010. 11861-05. Functional Class: Collector ICD estimated from Google Maps linework. | 
| 
                Columbia,
                MD Howard Co. United States  | 
            
                Stevens Forest Rd. / Farewell Rd. / Night Street Hill (39.20114, -76.84781)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 27.4320  | 
            
                Other (At-Grade) Single-lane w/ Traversable Central Island  |   
            2019 | |
| 
                Hillsboro,
                VA Loudoun Co. United States  | 
            
                Charles Town Pike (Rte 9) / Stony Point Rd. (39.20016, -77.72763)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 1 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2021 | https://www.washingtonpost.com/transportation/2021/07/23/virginia-hillsboro-walkable-roads-loudoun/ | 
| 
                Columbia,
                MD Howard Co. United States  | 
            
                Owen Brown Rd. / Martin Rd. (39.19989, -76.86930)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 28.9560  | 
            
                Other (At-Grade) Single-Lane  |   
            2004 | Year Completed estimated (2002-2005). | 
| 
                Cagliari,
                Sardinia Cagliari Italy  | 
            
                Viale Salvatore Ferrara / Via Ramontana / Via Borgo Sant'Elia / Viale San Bartolomeo (39.19857, 9.14366)  | 
            
                Other Existing  | 
            
                All-Way Stop Unknown  | 
            
                4 Approaches 0 Driveways  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            ||
| 
                Carson City,
                NV Carson City Co. United States  | 
            
                Arrowhead Dr. / I-580 NB Ramps / Imus Rd. (39.19840, -119.77380)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 28.6923  | 
            
                Freeway Ramps (Grade-Separated) Single-Lane  |   
            2002 | NB off-ramp for Carson City Freeway (I-580) and extension of Imus Road. Overpass and roundabouts completed in 2002. ICD estimated from Google Maps linework. | 
| 
                Carson City,
                NV Carson City Co. United States  | 
            
                Arrowhead Dr. / I-580 SB Ramp (39.19810, -119.77540)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 27.7669  | 
            
                Freeway Ramps (Grade-Separated) Single-Lane  |   
            2002 | Future SB on-ramp for Carson City Freeway (I-580). Overpass and roundabouts completed in 2002; freeway ramps completed ~2005. ICD estimated from Google Maps linework. | 
| 
                Hillsboro,
                VA Loudoun Co. United States  | 
            
                Charles Town Pike (Rte 9) / Hillsboro Rd. / (school access) (39.19806, -77.72000)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            2021 | https://www.washingtonpost.com/transportation/2021/07/23/virginia-hillsboro-walkable-roads-loudoun/ | 
| 
                Kansas City,
                MO Platte Co. United States  | 
            
                NW 56th St. / N Northwood Rd. (39.19598, -94.63168)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 38.1000  | 
            
                Other (At-Grade) Single-Lane  |   
            2019 | |
| 
                Kansas City,
                MO Platte Co. United States  | 
            
                NW Waukomis Dr. / NW Englewood Rd. (39.19588, -94.60730)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 35.0520  | 
            
                Other (At-Grade) Single-Lane  |   
            2020 | |
| 
                Aspen,
                CO Pitkin Co. United States  | 
            
                SR 82 / Maroon Creek Rd. / Castle Creek Rd. (39.19557, -106.84025)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 60.9600  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2000 | |
| 
                Cagliari,
                Sardinia Cagliari Italy  | 
            
                Viale Poetto / Via Lungo Saline / Via Marina Piccola (39.19421, 9.15682)  | 
            
                Other Existing  | 
            
                Other Unknown  | 
            
                4 Approaches 0 Driveways  | 
            
                Other (At-Grade) Multilane (3+ Lane)  |   
            Mix of stop and yield control on entry. | |
| 
                Kansas City,
                MO Clay Co. United States  | 
            
                N Mercier St. / N Summit St. (39.19389, -94.59236)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 53.3400  | 
            
                Other (At-Grade) Single-Lane  |   
            2016 | Year Completed estimated (2016-2017). | 
| 
                Winchester,
                VA Frederick Co. United States  | 
            
                Conference Center Dr. / (unknown) (39.19363, -78.20051)  | 
            
                Unknown Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                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. | 
| 
                Manhattan,
                KS Riley Co. United States  | 
            
                Anderson Ave. / Kimball Ave. / Scenic Dr. (39.19169, -96.64167)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 62.0184  | 
            
                Other (At-Grade) Multilane (2 Lane, unspecified)  |   
            2018 | ICD estimated from Google Maps linework. | 
| 
                Columbia,
                MD Howard Co. United States  | 
            
                Cradlerock Way / Homespun Dr. (39.19095, -76.83787)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 22.2158  | 
            
                Other (At-Grade) Single-Lane  |   
            2001 | Completed May 21, 2001. Previously controlled by one-way stop Functional Class: Collector ICD estimated from Google Maps linework. | 
| 
                Bloomington,
                IN Monroe Co. United States  | 
            
                W Woodyard Rd. / N Smith Pike (39.19089, -86.58340)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 36.5760  | 
            
                Other (At-Grade) Single-Lane  |   
            2022 | Series of 2 roundabouts. | 
| 
                Germantown,
                MD Montgomery Co. United States  | 
            
                Germantown Rd. / Watkins Mill Rd. / Blunt Rd. (39.19058, -77.22492)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 36.5760  | 
            
                Other (At-Grade) Single-Lane  |   
            1999 | Right-turn bypass lane on north leg. Year Completed estimated (1993-2005). | 
| 
                Bloomington,
                IN Monroe Co. United States  | 
            
                W Woodyard Rd. / N Curry Pike / W Hunter Valley Rd. (39.19027, -86.58242)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 56.3877  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x1 max)  |   
            2022 | Series of 2 roundabouts. Striped out spiral in circulatory roadway. https://www.heraldtimesonline.com/story/news/traffic/2022/03/03/work-2-6-m-double-roundabout-bloomington-start-next-week/9332294002/ | 
| 
                Long Reach,
                MD Howard Co. United States  | 
            
                Shining Oceans Way / Dried Earth Blvd. (39.18977, -76.80673)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            No splitter islands. | |
| 
                Riverside,
                MO Platte Co. United States  | 
            
                N Woodward Rd. / NW 52nd St. (39.18892, -94.63177)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 37.9531  | 
            
                Other (At-Grade) Single-Lane  |   
            2012 | ICD estimated from Google Maps linework. | 
| 
                Germantown,
                MD Montgomery Co. United States  | 
            
                Pickering Dr. / Pickering Pl. (39.18854, -77.27173)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Manhattan,
                KS Riley Co. United States  | 
            
                4th St. / Bluemont Ave. (39.18669, -96.56160)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 41.6571  | 
            
                Other (At-Grade) Single-Lane  |   
            2010 | Previously controlled by two-way stop ICD estimated from Google Maps linework. | 
| 
                Winchester,
                VA Winchester City Co. United States  | 
            
                E Piccadilly St. / N East Ln. / National Ave. (39.18564, -78.16067)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 25.9204  | 
            
                Other (At-Grade) Single-Lane  |   
            2015 | https://www.facebook.com/winchestervagov/posts/roundabout-at-national-avenuepiccadilly-street-intersection-is-really-beginning-/10153626945621055/. ICD estimated from Google Maps linework. | 
| 
                Germantown,
                MD Montgomery Co. United States  | 
            
                Club Hill Dr. / Thackery Pl. (39.18531, -77.27012)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Carson City,
                NV Carson City Co. United States  | 
            
                Northridge Dr. / Tablerock Dr. (39.18460, -119.75685)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 25.9080  | 
            
                Other (At-Grade) Single-Lane  |   
            1999 | Year Completed estimated (1994-1999). | 
| 
                Germantown,
                MD Montgomery Co. United States  | 
            
                Observation Dr. / Goldenrod Ln. (39.18419, -77.24566)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 45.7200  | 
            
                Other (At-Grade) Multilane (2 Lane, 2x2 max)  |   
            2013 | Year Completed estimated (2012-2014). | 
| 
                Carson City,
                NV Carson City Co. United States  | 
            
                Northridge Dr. / Carriage Crest Dr. (39.18290, -119.75077)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 24.3840  | 
            
                Other (At-Grade) Single-Lane  |   
            1997 | Year Completed estimated (1994-1999). | 
| 
                Winchester,
                VA Winchester City United States  | 
            
                Mahone Dr. / Ramseur Ln. (39.18178, -78.18846)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Carson City,
                NV Carson City Co. United States  | 
            
                Northridge Dr. / Spooner Dr. (39.18150, -119.74896)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 99.9997  | 
            
                Other (At-Grade) Single-Lane  |   
            1997 | Painted splitter islands on Northridge approaches. Year Completed estimated (1994-1999). | 
| 
                Gaithersburg,
                MD Montgomery Co. United States  | 
            
                Hoover Farm Dr. / Holland Meadow Ln. (39.18129, -77.13125)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            No splitter islands. | |
| 
                Winchester,
                VA Winchester City United States  | 
            
                Mahone Dr. / Rhodes Cir. / Gordon Pl. / McGruder Ct. (39.18038, -78.19089)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Bloomington,
                IN Monroe Co. United States  | 
            
                N Monroe St. / W 17th St. / W Arlington Rd. (39.17914, -86.54712)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 1 Driveways 37.0325  | 
            
                Other (At-Grade) Single-Lane  |   
            2014 | ICD estimated from Google Maps linework. | 
| 
                Germantown,
                MD Montgomery Co. United States  | 
            
                Kildale Hills Terrace / Galway Bay Cir. (39.17826, -77.27643)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Unknown  |   
            ||
| 
                Gaithersburg,
                MD Montgomery Co. United States  | 
            
                Hoover Farm Dr. / Brass Bucket Ct. (39.17775, -77.13018)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            No splitter islands. | |
| 
                Kansas City,
                KS Wyandotte Co. United States  | 
            
                N 131st Dr. / Meadow Ln. (39.17638, -94.88099)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 1 Driveways 36.5760  | 
            
                Other (At-Grade) Single-Lane  |   
            2003 | |
| 
                Pasadena,
                MD Anne Arundel Co. United States  | 
            
                Creekside Village Blvd. / Oak Creek Dr. (39.16938, -76.57165)  | 
            
                Other Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            No splitter island on southeast leg. | |
| 
                Yuba City,
                CA Sutter Co. United States  | 
            
                Butte Vista Ln. / Tres Picos Ln. (39.16908, -121.64820)  | 
            
                Traffic Calming Circle Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 26.8524  | 
            
                Other (At-Grade) Single-Lane  |   
            2004 | ICD estimated from Google Maps linework. | 
| 
                Cleves,
                OH Hamilton Co. United States  | 
            
                Cooper Ave. / (high school parking) (39.16904, -84.75329)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 30.4800  | 
            
                Other (At-Grade) Single-Lane  |   
            2016 | Painted splitter island on south leg. | 
| 
                Yuba City,
                CA Sutter Co. United States  | 
            
                Stabler Ln. / Butte Vista Ln. (39.16747, -121.64400)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 46.2983  | 
            
                Other (At-Grade) Single-Lane  |   
            2006 | ICD estimated from Google Maps linework. | 
| 
                Kansas City,
                MO Clay Co. United States  | 
            
                Parvin Rd. / Prather Rd. (MO Hwy 1) (39.16738, -94.55294)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 41.1480  | 
            
                Other (At-Grade) Single-Lane  |   
            2020 | https://www.facebook.com/MoDOT.KansasCity/posts/project-update-the-parvin-rd-and-prather-rd-roundabout-project-in-clay-county-is/10158316265513515/ | 
| 
                Germantown,
                MD Montgomery Co. United States  | 
            
                Crossview Rd. / Autumn Crest Rd. (39.16717, -77.30075)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                4 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            No splitter islands. | |
| 
                Kansas City,
                MO Clay Co. United States  | 
            
                NW Briarcliff Pkwy. / MO-9 NB Ramps / NW Platte Rd. (39.16606, -94.59842)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                4 Approaches 0 Driveways 79.2480  | 
            
                Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)  |   
            2012 | Right-turn bypass lanes on north and east quadrants. | 
| 
                Kansas City,
                MO Clay Co. United States  | 
            
                NW Briarcliff Pkwy. / MO-9 SB Ramps / NW Tullison Rd. / NW 38th St. (39.16472, -94.59926)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 85.3440  | 
            
                Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)  |   
            2012 | |
| 
                Germantown,
                MD Montgomery Co. United States  | 
            
                Summer Oak Dr. / Summer Oak Ct. (39.16467, -77.24384)  | 
            
                Other Existing  | 
            
                Unknown Unknown  | 
            
                3 Approaches 0 Driveways 0.0000  | 
            
                Other (At-Grade) Single-Lane  |   
            No splitter islands on two legs. | |
| 
                Tahoe City,
                CA Placer Co. United States  | 
            
                SR 89 / W River Rd. (39.16425, -120.14919)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                3 Approaches 0 Driveways 34.2623  | 
            
                Other (At-Grade) Single-Lane  |   
            2019 | https://flh.fhwa.dot.gov/projects/ca/truckee/ ICD estimated from Google Maps linework. | 
| 
                Upper Lake,
                CA Lake Co. United States  | 
            
                SR 20 / SR 29 (39.16333, -122.92095)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield Unknown  | 
            
                3 Approaches 0 Driveways 36.1148  | 
            
                Other (At-Grade) Single-Lane  |   
            2015 | ICD estimated from Google Maps linework. | 
| 
                Laddonia,
                MO Audrain Co. United States  | 
            
                US 54 / MO 19 / Hwy BB (39.16323, -91.64907)  | 
            
                Roundabout Existing  | 
            
                All-Way Yield None  | 
            
                4 Approaches 0 Driveways 54.8640  | 
            
                Other (At-Grade) Single-Lane  |   
            2019 | https://www.modot.org/roundabouts-us-route-54 |