Roundabouts Database Index

29411 Results

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City, State County Country	Intersection (Lat, Lng)	Type Status	Control Type / Other Control Type	Approaches / Driveways / ICD (m)	Functional Class / LaneType	Year Completed	Comments
Bel Air South, MD Harford Co. United States	Laurel Bush Rd. / Falkland Dr. / Dowers Rd. (39.48330, -76.29847)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2017	Year Completed estimated (2013-2017).
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.
Middletown, DE New Castle Co. United States	(Summit Bridge Rd. connector) / US 301 NB Ramps (39.48404, -75.72131)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 34.1060	Freeway Ramps (Grade-Separated) Single-Lane	2018	Raindrop shape. ICD estimated from Google Maps linework.
Middletown, DE New Castle Co. United States	(Summit Bridge Rd. connector) / US 301 SB Ramps (39.48446, -75.72248)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 35.0276	Freeway Ramps (Grade-Separated) Single-Lane	2019	Raindrop shape. ICD estimated from Google Maps linework.
Hamilton, OH Butler Co. United States	Trenton Oxford Rd. (SR 73) / Jacksonburg Rd. (39.48456, -84.51249)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 45.7200	Other (At-Grade) Single-Lane	2021
Breckenridge, CO Summit Co. United States	N Park Ave. / Watson Ave. (39.48470, -106.04887)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2022	https://www.townofbreckenridge.com/live/watson-roundabout
Franklin, IN Johnson Co. United States	Paris Dr. / (unknown) (39.48524, -86.01812)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 48.7680	Other (At-Grade) Single-Lane	2016
Oakland, MD Garrett Co. United States	Heron Circle (39.48570, -79.32376)	Other Existing	Unknown Unknown	3 Approaches 1 Driveways 0.0000	Other (At-Grade) Unknown
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.
Castle Pines, CO Douglas Co. United States	Daniels Gate Dr. / Grigs Rd. (39.48770, -104.91860)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 37.7912	Other (At-Grade) Single-Lane	2001	Year Completed estimated (1999-2002). ICD estimated from Google Maps linework.
Aberdeen, MD Harford Co. United States	Old Philadelphia Rd. (MD 7) / Perryman Rd. (MD 159) (39.48791, -76.19155)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 37.7911	Other (At-Grade) Single-Lane	2019	https://www.facebook.com/pg/Harford-County-Roundabouts-308793279204833/posts/ ICD estimated from Google Maps linework.
Bel Air, MD Harford Co. United States	MD 7 / Holly Oaks Drive (39.48848, -76.21669)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 34.1039	Other (At-Grade) Single-Lane	1999	Opened September 1999. ICD estimated from Google Maps linework.
Aberdeen, MD Harford Co. United States	MD 7 (Philadelphia Rd.) / Seven Trails Dr. / (unknown) (39.48874, -76.22404)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 46.0861	Other (At-Grade) Multilane (2 Lane, unspecified)	2017	ICD estimated from Google Maps linework.
Martinsville, IN Morgan Co. United States	Henderson Ford Rd. / I-69 NB Ramps (39.48881, -86.35250)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Single-Lane	2021	Raindrop shaped.
Franklin, IN Johnson Co. United States	SR 144 / Centerline Rd. (39.48953, -86.10301)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2021	Opened October 29, 2021. https://www.newsbreak.com/news/2147518280293/sr-144-centerline-road-roundabout-on-deck-this-year
Martinsville, IN Morgan Co. United States	Henderson Ford Rd. / I-69 SB Ramps (39.48996, -86.35342)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Single-Lane	2021	https://www.reporter-times.com/story/news/local/2021/09/13/69-martinsville-henderson-ford-road-interchange-partially-opens/8314509002/
Bel Air, MD Harford Co. United States	Tollgate Rd. / Wheel Rd. (39.48999, -76.32914)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 28.5729	Other (At-Grade) Single-Lane	1999	http://www.teachamerica.com/roundabouts/RA058B_ppr_Statmeyer.pdf#search=%22bel%20air%20roundabout%22 ICD estimated from Google Maps linework.
Franklin, IN Johnson Co. United States	N Main St. / Oliver Ave. / Clark St. / Walnut St. (39.49008, -86.05955)	Other Existing	All-Way Yield None	5 Approaches 1 Driveways 51.8160	Other (At-Grade) Single-Lane	2013	Circular intersection with roundabout characteristics on all legs but one, which is stop-controlled and has no splitter island (raised or painted). Elliptical shaped. ICD 170 feet x 120 feet. Year Completed estimated (2012-2014).
Breckenridge, CO Summit Co. United States	Main St. / N. Park Ave. (39.49046, -106.04560)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 32.2595	Other (At-Grade) Multilane (2 Lane, unspecified)	2006	ICD estimated from Google Maps linework.
Franklin, IN Johnson Co. United States	Eastview Dr. / Upper Shelbyville Rd. (39.49053, -86.03328)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 48.7680	Other (At-Grade) Single-Lane	2018
Lebanon, OH Warren Co. United States	Old 122 Rd. / Township Line Rd. (39.49304, -84.14194)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 40.5533	Other (At-Grade) Single-Lane	2018	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.
Franklin, IN Johnson Co. United States	Hurricane Rd. / Arvin Dr. / Eastview Dr. (39.49352, -86.04188)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 48.7680	Other (At-Grade) Single-Lane	2019
Franklin, IN Johnson Co. United States	Arvin Dr. / Hurricane St. / Commerce Pkwy. (39.49361, -86.04878)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2021	http://www.dailyjournal.net/2021/01/25/fourth-roundabout-coming-to-franklin-truck-bypass/
Abingdon, MD Harford Co. United States	Laurel Bush Rd. / E Wheel Rd. (39.49411, -76.31652)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 33.5280	Other (At-Grade) Single-Lane	2010	Year Completed estimated (2009-2011).
Village of Bayberry North, DE New Castle Co. United States	Barrymore Pkwy. / Stravinsky Ave. (39.49421, -75.66228)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands on north and south legs.
Aberdeen, MD Harford Co. United States	Heathland Trl. / Spindrift Rd. / Bentgrass Dr. (39.49427, -76.20490)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
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.
Pleasant Hills, MD Harford Co. United States	Fallston Blvd. (39.49526, -76.38632)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
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.
Parker, CO Douglas Co. United States	S Red Sky Dr. / S Swift Fox Way (39.49572, -104.80072)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 33.5280	Other (At-Grade) Single-Lane	2005	Year Completed estimated (2004-2005).
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.
Littleton, CO Douglas Co. United States	Middle Fork St. / Mt Jackson St. (39.49687, -105.04533)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 27.4320	Other (At-Grade) Single-Lane	2018	Year Completed estimated (2017-2018).
Boonsboro, MD Washington Co. United States	US 40 Alternate (Old National Pike) / MD 67 (Rothersville Rd.) / Ostertag Pass (39.49747, -77.64507)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 38.1000	Other (At-Grade) Single-Lane	2019
Littleton, CO Douglas Co. United States	Middle Fork St. / Garden City Ave. (39.49889, -105.04348)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 27.4320	Other (At-Grade) Single-Lane	2018	Year Completed estimated (2017-2018).
Village of Bayberry North, DE New Castle Co. United States	S Bayberry Pkwy. / Stravinsky Ave. (39.49978, -75.66823)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands on west, south, or east legs.
Village of Bayberry North, DE New Castle Co. United States	S Bayberry Pkwy. / Lord Byron Dr. / W Central Park Dr. (39.49989, -75.67806)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Hidden River, CO Douglas Co. United States	Club Dr. / Bridlewood Ln. (39.50029, -104.74912)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands; only diverging yellow lines.
Boonsboro, MD Washington Co. United States	Monument Dr. / East Wing Way (39.50047, -77.65002)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Bel Air South, MD Harford Co. United States	S Tollgate Rd. / Plumtree Rd. (39.50070, -76.33349)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 31.3332	Other (At-Grade) Single-Lane	2016	ICD estimated from Google Maps linework.
Reno, NV Washoe Co. United States	Greenwich Way / Waverly Dr. (39.50072, -119.86053)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Boonsboro, MD Washington Co. United States	Monument Dr. / Midlothian Way (39.50117, -77.65254)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Frisco, CO Summit Co. United States	Copper Rd / Beeler Pl. / Copper Cir. (39.50153, -106.15826)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2003	Year Completed estimated (1999-2005).
Reno, NV Washoe Co. United States	Caughlin Crossing / Caughlin Glen (39.50195, -119.85952)	Other Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Painted splitter islands.
Boonsboro, MD Washington Co. United States	Monument Dr. / West Wing Way (39.50248, -77.65503)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Littleton, CO Douglas Co. United States	Eagle River St. / Williamsburg St. (39.50250, -105.03622)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 27.4320	Other (At-Grade) Single-Lane	2017	Year Completed estimated (2017-2018).
Franklin, IN Johnson Co. United States	Brookhaven Dr. / Cedarmill Dr. (39.50326, -86.04183)	Other Existing	All-Way Stop None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Middletown, DE New Castle Co. United States	Churchtown Rd. / Choptank Rd. (39.50377, -75.74957)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 27.6457	Other (At-Grade) Single-Lane	2009	Year Completed estimated (2008-2009). ICD estimated from Google Maps linework.
Littleton, CO Douglas Co. United States	Eagle River St. / Blue River Ave. (39.50434, -105.03678)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 27.4320	Other (At-Grade) Single-Lane	2017
Parker, CO Douglas Co. United States	Blackmoor St. (39.50578, -104.72041)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
(unincorporated), CO Douglas Co. United States	Titan Rd. / Eagle River St. (39.50721, -105.03658)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 51.6027	Other (At-Grade) Single-Lane	2017	Roundabout has been constructed, but is not being fully utilized yet until the Sterling Ranch development is complete. ICD estimated from Google Maps linework.
Franklin, IN Johnson Co. United States	N Graham Rd. / Commerce Dr. / Commerce Pkwy. (39.50765, -86.05535)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2022
Franklin, IN Johnson Co. United States	Commerce Dr. / Cumberland Dr. / Simon Rd. (39.50767, -86.08405)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2023	https://dailyjournal.net/2023/08/01/sculpture-shaped-planned-by-students-unveiled-at-fchs-roundabout/
Franklin, IN Johnson Co. United States	Brookshire Dr. / Cedarmill Dr. (39.50779, -86.04207)	Other Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Glenwood Springs, CO Garfield Co. United States	Airport Rd / MIdland Rd / Four Mile Rd / (unknown) (39.50807, -107.31691)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2021	Year Completed estimated (2021-2023).
Bel Air South, MD Harford Co. United States	S Tollgate Rd. / W Ring Factory Rd. (39.50873, -76.34550)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 28.5652	Other (At-Grade) Single-Lane	2006	Year Completed estimated (2005-2007). ICD estimated from Google Maps linework.
Reno, NV Washoe Co. United States	Wells Ave. / Regency Way (39.50890, -119.80320)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 29.4866	Other (At-Grade) Single-Lane	2004	ICD estimated from Google Maps linework.
Rowley Downs, CO Douglas Co. United States	Aintree Ct. / Aintree Pl. (39.50899, -104.75397)	Other Existing	Unknown Unknown	3 Approaches 2 Driveways 0.0000	Other (At-Grade) Single-Lane
Reno, NV Washoe Co. United States	W 4th St. / Woodland Ave. (39.50921, -119.89662)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2023	https://www.rtcwashoe.com/engineering-project/4th-street-and-woodland-avenue-roundabout/
Parker, CO Douglas Co. United States	Pavilion Dr. / (parking lots) (39.50940, -104.76748)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 27.6435	Other (At-Grade) Single-Lane	2003	Within shopping center. Year Completed estimated (2001-2004). ICD estimated from Google Maps linework.
Parker, CO Douglas Co. United States	E. Neu Towne Pkwy. / (unknown) (39.51047, -104.78530)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 34.0931	Other (At-Grade) Single-Lane	2005	ICD estimated from Google Maps linework.
Oxford, OH Butler Co. United States	US 127 / SR 73 (39.51120, -84.60918)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2021	ODOT maintains
Parker, CO Douglas Co. United States	E. Neu Towne Pkwy. / S. Cedar Gulch Ln. (39.51147, -104.79250)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 35.0140	Other (At-Grade) Single-Lane	2005	ICD estimated from Google Maps linework.
Parker, CO Douglas Co. United States	S. Cedar Gulch Ln. / (unknown) (39.51289, -104.79120)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 35.9347	Other (At-Grade) Single-Lane	2005	ICD estimated from Google Maps linework.
Parker, CO Douglas Co. United States	Clubhouse Dr. / S Pikes Peak Dr. (39.51305, -104.76302)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 28.5634	Other (At-Grade) Single-Lane	1998	Year Completed estimated (1994-1999). ICD estimated from Google Maps linework.
Bel Air, MD Harford Co. United States	Old Joppa Ct. / Hoskins Terrace (39.51380, -76.37506)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 32.0040	Other (At-Grade) Single-Lane	2016	Year Completed estimated (2014-2017).
Mortensen-Garson, NV Washoe Co. United States	Cabela Dr. / I-80 WB Ramps / (parking lots) (39.51394, -119.96679)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 46.9908	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2008	Year Completed estimated (2006-2010). ICD estimated from Google Maps linework.
Reno, NV Washoe Co. United States	US 40 (BR I-80) / Somersett Ridge Pkwy. (39.51411, -119.95086)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 46.9907	Other (At-Grade) Single-Lane	2008	ICD estimated from Google Maps linework.
Reno, NV Washoe Co. United States	S Virginia St. (US 395 Business) / Mary St. / S Center St. (39.51483, -119.80760)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020	https://pathofex.com/its-like-a-whole-new-world-midtown-unr-area-businesses-react-to-virginia-street-project-completion/
Littleton, CO Douglas Co. United States	Chatfield Lake Rd. / Eagle River St. / (unknown) (39.51555, -105.04585)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 48.7680	Other (At-Grade) Single-Lane	2020
Oroville, CA Butte Co. United States	Montgomery St. / Washington Ave. / Table Mountain Blvd. (39.51611, -121.54970)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.8544	Other (At-Grade) Single-Lane	2008	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.
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
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.
Bel Air, MD Harford Co. United States	Tollgate Rd. / Marketplace Dr. (39.52092, -76.35262)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 28.5602	Other (At-Grade) Single-Lane	1996	Three leg, off-set roundabout - off-set due to lack of r/w on top side of Functional Class: Collector ICD estimated from Google Maps linework.
Logan, OH Hocking Co. United States	SR 328 / US 33 SB Ramps (39.52126, -82.37668)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 45.7200	Freeway Ramps (Grade-Separated) Single-Lane	2017
Middletown, DE New Castle Co. United States	Bethel Church Rd. / Choptank Rd. (39.52188, -75.74826)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 30.4023	Other (At-Grade) Single-Lane	2010	ICD estimated from Google Maps linework.
Reno, NV Washoe Co. United States	SR 425 / Edinburg Dr. (39.52257, -119.96617)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2019	Year Completed estimated (2018-2019).
Rifle, CO Garfield Co. United States	Taughenbaugh Blvd. / 7th St. / Airport Rd. (39.52260, -107.77673)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.8509	Other (At-Grade) Multilane (2 Lane, unspecified)	2009	ICD estimated from Google Maps linework.
Middletown, DE New Castle Co. United States	Jamison Corner Rd. / US 301 NB Ramps (39.52313, -75.67956)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 40.5357	Freeway Ramps (Grade-Separated) Single-Lane	2018	ICD estimated from Google Maps linework.
Rifle, CO Garfield Co. United States	Taughenbaugh Blvd. / I-70 EB Ramps (39.52339, -107.77710)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 50.6695	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2009	ICD estimated from Google Maps linework.
Littleton, CO Douglas Co. United States	N Roxborough Park Rd. / Bright Sky Ln. (39.52370, -105.05422)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2020
Riverside at Somersett, NV Washoe Co. United States	Somersett Pkwy. / River Hill Way (39.52375, -119.91112)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 58.0393	Other (At-Grade) Multilane (2 Lane, unspecified)	2003	ICD estimated from Google Maps linework.
Oroville, CA Butte Co. United States	Table Mountain Blvd. / Nelson Ave. / Cherokee Rd. (39.52418, -121.55881)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 40.5351	Other (At-Grade) Single-Lane	2016	Yield-controlled right-turn bypass lane on northeast leg. ICD estimated from Google Maps linework.
Glenwood Springs, CO Garfield Co. United States	Midland Ave. / 27th St. / (unknown) (39.52449, -107.32718)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 35.0074	Other (At-Grade) Single-Lane	2009	Year Completed estimated (2006-2011). Fourth approach to new subdivision added 2015-2017. ICD estimated from Google Maps linework.
(unincorporated), CO Douglas Co. United States	Meridian Village Pkwy. / Rutledge Ln. (39.52471, -104.82329)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 41.4561	Other (At-Grade) Single-Lane	2006	ICD estimated from Google Maps linework.
Middletown, DE New Castle Co. United States	Jamison Corner Rd. / US 301 SB Ramps (39.52516, -75.67982)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 34.0859	Freeway Ramps (Grade-Separated) Single-Lane	2018	https://www.youtube.com/watch?v=EAI_NlUZRbU ICD estimated from Google Maps linework.
Glenwood Springs, CO Garfield Co. United States	27th St. / Grand Ave. (39.52536, -107.32501)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 29.8704	Other (At-Grade) Single-Lane	2020	https://www.postindependent.com/news/27th-street-roundabout-a-tight-turn-for-full-size-semi-trucks-other-vehicles-ok-city-officials-say/
Breckenridge, CO Summit Co. United States	CO-9 / Stan Miller Dr. / Fairview Blvd. (39.52585, -106.04534)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 40.5341	Other (At-Grade) Multilane (2 Lane, unspecified)	2015	ICD estimated from Google Maps linework.
Bel Air, MD Harford Co. United States	English Manor Ln. / Squire Ln. / Canterbury Rd. (39.52643, -76.36371)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Littleton, CO Douglas Co. United States	Chatfield Lake Rd. / N Roxborough Park Rd. (39.52660, -105.05232)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 44.1960	Other (At-Grade) Single-Lane	2020	Merging right-turn bypass lane on south leg.
Middletown, DE New Castle Co. United States	Jamison Corner Rd. / Hyatt's Corner Rd. (39.52718, -75.67941)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 42.3758	Other (At-Grade) Single-Lane	2013	Year Completed estimated (2011-2015). ICD estimated from Google Maps linework.
Aberdeen, MD Harford Co. United States	Beards Hill Rd. / Middleton Rd. / Olympic Square (39.52719, -76.17773)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 27.6364	Other (At-Grade) Single-Lane	2019	https://www.baltimoresun.com/maryland/harford/aegis/cng-ag-aberdeen-roundabout-opens-0927-20190926-2itkrrn43jctnkw2ch6et7ky7m-story.html ICD estimated from Google Maps linework.
Reno, NV Washoe Co. United States	E 2nd St. / Giroux St. (39.52751, -119.79198)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown	2021	Giroux Street is one-way away from the intersection; previous intersection only had one conflicting vehicular movement (EBLT) and three pedestrian crossings. Year Completed estimated (2018-2021).
(unincorporated), CO Douglas Co. United States	Meridian Village Pkwy. / Ashgrove Dr. (39.52786, -104.82450)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 42.3754	Other (At-Grade) Single-Lane	2006	ICD estimated from Google Maps linework.
(unincorporated), CO Douglas Co. United States	Ridgegate Pkwy. / Ridgegate Cir. / Park Meadows Blvd. (39.52945, -104.87450)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 54.3498	Other (At-Grade) Multilane (2 Lane, unspecified)	2006	Part of transit-oriented development near future light-rail station ICD estimated from Google Maps linework.
Middletown, DE New Castle Co. United States	Jamison Corner Rd. / Lornwood Grove Rd. (39.53013, -75.67821)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 40.5316	Other (At-Grade) Single-Lane	2013	Year Completed estimated (2011-2015). ICD estimated from Google Maps linework.
Westminster, MD Carroll Co. United States	(Carroll Community College entrance) / (parking) (39.53096, -76.99236)	Other Existing	One-Way/Two-Way Stop Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
(unincorporated), CO Douglas Co. United States	Meridian Village Pkwy. / Bristleridge Dr. (39.53102, -104.82616)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 43.2946	Other (At-Grade) Single-Lane	2006	ICD estimated from Google Maps linework.
Meridian Inernational Business Center, CO Douglas Co. United States	Tall Oaks St. / Bristleridge Dr. (39.53104, -104.82951)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.