Roundabouts Database Index

28782 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
Castle Rock, CO Douglas Co. United States	Rising Sun Dr. / Autumn Sage St. (39.39210, -104.82736)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 47.0731	Other (At-Grade) Single-Lane	2005	Year Completed estimated (2004-2007). ICD estimated from Google Maps linework.
Owings Mills, MD Baltimore Co. United States	Ballard Green Dr. / Wilson Shannon Dr. / Julia Ln. (39.39162, -76.80439)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2017	Year Completed estimated (2017-2018).
Liberty Twp, OH Butler Co. United States	Princeton Rd. / Yankee Rd. (39.39133, -84.38398)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 35.9975	Other (At-Grade) Single-Lane	2017	Opened in August 2017. ICD estimated from Google Maps linework.
Liberty Township, OH Butler Co. United States	Hughes Woods Ln. / Hughes Ridge Ln. (39.39099, -84.40464)	Other Existing	All-Way Yield None	3 Approaches 0 Driveways 43.3818	Other (At-Grade) Single-Lane	1998	No splitter islands. ICD estimated from Google Maps linework.
Linganore, MD Frederick Co. United States	Mussetter Rd. / Whiterose Dr. / Whiterose Way (39.39008, -77.29747)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 41.1480	Other (At-Grade) Single-Lane	2002	Painted splitter islands on three legs. Year Completed estimated (1988-2005).
Linganore, MD Frederick Co. United States	Old National Pike / Eaglehead Dr. (39.38995, -77.31098)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 50.2920	Other (At-Grade) Multilane (2 Lane, unspecified)	2008	South leg stubbed. Constructed initially as single-lane roundabout in 2007-2008. Expanded into two-lane roundabout 2016-2018.
Williamstown, WV Wood Co. United States	Highland Ave. (WV 14) / Williamstown Pike (WV 31) (39.38888, -81.44158)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020	https://www.newsandsentinel.com/news/local-news/2020/11/williamstown-roundabout-opens-to-traffic/ https://www.youtube.com/watch?v=iusQxGx9zLA
Basalt, CO Eagle Co. United States	Willits Ln. / E Valley Rd. (39.38865, -107.08520)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 38.7680	Other (At-Grade) Single-Lane	2011	https://www.aspentimes.com/news/willits-lane-roundabout-due-for-work/ https://www.gouldconstruction.com/willits-lane-east-valley-road-roundabout-2/ ICD estimated from Google Maps linework.
Pikesville, MD Baltimore Co. United States	Travertine Dr. (39.38721, -76.68990)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown		Parking along circulatory roadway; pedestrian access to central island.
Liberty Twp, OH Butler Co. United States	Princeton Rd. / Mauds Hughes Rd. (39.38669, -84.41094)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2023	This is Butler County's 41st roundabout. It opened November 16th, 2023.
(unincorporated), OH Butler Co. United States	Princeton Rd. / Maud Hughes Rd. (39.38667, -84.41091)	Roundabout Unknown	All-Way Yield None	3 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2023	https://www.bceo.org/news/2023/03/princeton-rd-roundabout-bridge-construction-begins/
Castle Rock, CO Douglas Co. United States	Autumn Sage St. / Copper Cloud Dr. / Trail Stone Cir. (39.38614, -104.82199)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 57.2310	Other (At-Grade) Single-Lane	2005	Year Completed estimated (2005-2006). ICD estimated from Google Maps linework.
Mount Washington, MD Baltimore Co. United States	Quarry Lake Dr. / Stone Cliff Dr. (39.38398, -76.69603)	Other Existing	Other Unknown	2 Approaches 1 Driveways 0.0000	Other (At-Grade) Single-Lane		Uncontrolled entry on southeast leg.
Frederick, MD Frederick Co. United States	Jefferson Pike (MD 180) / Mt Zion Rd. (39.38286, -77.48054)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.9250	Other (At-Grade) Single-Lane	2019	Opened August 2019. https://www.fredericknewspost.com/news/politics_and_government/public_safety/md-roundabout-opened/article_e67c26f7-ac5c-5931-b2e0-9e68faaa77d7.html ICD estimated from Google Maps linework.
Castle Rock, CO Douglas Co. United States	N Rocky View Rd. / Valley View Rd. / High Point Rd. (39.38189, -104.81125)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 62.4840	Other (At-Grade) Single-Lane	2016	Year Completed estimated (2015-2017).
Ballenger Creek, MD Frederick Co. United States	Holiday Dr. / Spectrum Dr. (39.38178, -77.40206)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 44.1960	Other (At-Grade) Multilane (2 Lane, unspecified)	2008	Left turn lane trap in circulatory roadway.
Fairfield Township, OH Butler Co. United States	Hamilton Mason Rd. / Hancock Ave. / Grand Blvd. / Tuley Rd. / Tylersville Rd. (39.38134, -84.53572)	Roundabout Existing	All-Way Yield None	5 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2022	https://www.journal-news.com/news/five-points-roundabout-construction-to-happen-in-2022-in-hamilton/XYJYRDXKBVEK7DSQ7RPFT7RNFA/
Ijamsville, MD Frederick Co. United States	Royal Saint Andrews Pl. / Quail Creek Pl. (39.38039, -77.30788)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Castle Rock, CO Douglas Co. United States	Autumn Sage St. / Valley View Dr. (39.38026, -104.81919)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 62.4840	Other (At-Grade) Single-Lane	2016	Year Completed estimated (2015-2017).
Hamilton, OH Butler Co. United States	Hamilton Mason Rd. / Hamilton Enterprise Park Dr. / Gilmore Rd. (39.37927, -84.51743)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 40.6196	Other (At-Grade) Single-Lane	2019	Existing Gilmore Road was relocated to align with existing Hamilton Enterprise Park Dr. A single-lane modern roundabout with 150' inscribed diameter. ICD estimated from Google Maps linework.
Mason, OH Warren Co. United States	Mason Montgomery Rd. / Bethany Rd. (39.37924, -84.30723)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 49.8513	Other (At-Grade) Single-Lane	2015	Right turn lanes on all approaches, expandable to 2 lanes. ICD estimated from Google Maps linework.
Sykesville, MD Carroll Co. United States	Smithfield Ave. / Warfield Ave. (39.37673, -76.96410)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 47.0835	Other (At-Grade) Multilane (2 Lane, unspecified)	2007	Elliptical shape. ICD estimated from Google Maps linework.
Castle Highlands, CO Douglas Co. United States	Wolfensberger Rd. / Plum Creek Pkwy. / Coachline Rd. (39.37564, -104.88568)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 51.8160	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2018	Year Completed estimated (2017-2019).
Fairfield Township, OH Butler Co. United States	Hamilton Mason Rd. / Liberty Fairfield Rd. (39.37527, -84.48046)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 40.6219	Other (At-Grade) Single-Lane	2008	Since completion, has reduced accidents by 80%. Replaced two offset T intersections. Previously controlled by two-way stop Functional Class: Major Collector ICD estimated from Google Maps linework.
Liberty Township, OH Butler Co. United States	SR 129 / Cox Rd. / Veterans Blvd. (39.37289, -84.36015)	Roundabout Existing	All-Way Yield Rectangular Rapid Flashing Beacon (RRFB)	4 Approaches 0 Driveways 62.4840	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2022	New roundabout partially opened in November 2022. Full operation is scheduled in mid-December 2022. SR 129 highway was extended to Cox Road (local road) and new alignment (Veterans Blvd) was constructed to help alleviate traffic congestion and safety issues involving Liberty Way interchange with I-75.
Hamilton, OH Butler Co. United States	Hamilton Mason Rd. / LeSourdsville West Chester Rd. (39.37223, -84.42497)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 40.6237	Other (At-Grade) Single-Lane	2018	Opened August 2018. ICD estimated from Google Maps linework.
Liberty Township, OH Butler Co. United States	Veterans Blvd. / Bell Blvd. (39.37220, -84.35684)	Roundabout Existing	All-Way Yield Rectangular Rapid Flashing Beacon (RRFB)	4 Approaches 0 Driveways 54.8637	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2022	New road, Veterans Blvd, constructed for new development.
Liberty Township, OH Butler Co. United States	Veterans Blvd. / Reagan Way (39.37030, -84.35617)	Roundabout Existing	All-Way Yield Rectangular Rapid Flashing Beacon (RRFB)	4 Approaches 0 Driveways 54.8637	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2022	New roundabout on new alignment, Veterans Blvd, constructed for new commercial development (Costco).
Castle Rock, CO Douglas Co. United States	N Ridge Rd. / E Enderud Blvd. (39.36979, -104.82294)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 44.3183	Other (At-Grade) Multilane (2 Lane, unspecified)	2007	ICD estimated from Google Maps linework.
Castle Rock, CO Douglas Co. United States	S Wilcox St. / South St. (39.36917, -104.86011)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2021	http://crgov.com/3296/Wilcox-and-South-Roundabout
Smithville, MO Clay Co. United States	MO-92 / S Commercial Ave. (39.36881, -94.57949)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 36.9324	Other (At-Grade) Single-Lane	2009	ICD estimated from Google Maps linework.
Ballenger Creek, MD Frederick Co. United States	McLauren Ln. / Carston Ct. / Duncan Pl. (39.36852, -77.43743)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Kearney, MO Clay Co. United States	Rte 92-W 6th St. / Nation Rd. (39.36791, -94.38893)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 49.8594	Other (At-Grade) Single-Lane	2013	ICD estimated from Google Maps linework.
Kearney, MO Clay Co. United States	Rte 92-W 6th St. / Sam Barr Dr. (39.36785, -94.38055)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 47.0895	Other (At-Grade) Multilane (2 Lane, unspecified)	2013	ICD estimated from Google Maps linework.
Kearney, MO Clay Co. United States	Watson Dr. / (parking access) (39.36660, -94.36970)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 29.5469	Other (At-Grade) Single-Lane	2015	ICD estimated from Google Maps linework.
Mason, OH Warren Co. United States	Mason Rd. / Sarah Dr. (39.36641, -84.31909)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 32.3170	Other (At-Grade) Single-Lane	2010	ICD estimated from Google Maps linework.
Frederick, MD Frederick Co. United States	Ballenger Creek Pike (MD 351) / Elmer Derr Rd. / English Muffin Way (39.36625, -77.45071)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 37.8571	Other (At-Grade) Single-Lane	2012	Year Completed estimated (2011-2012). ICD estimated from Google Maps linework.
Ballenger Creek, MD Frederick Co. United States	Newton Dr. / Hiteshow Dr. / Cheatham Way (39.36597, -77.44595)	Other Existing	Unknown Unknown	5 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Basalt, CO Pitkin Co. United States	Emma Rd. / Basalt Ave. (39.36484, -107.03476)	Other Existing	Unknown None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Painted splitter islands.
Castle Rock, CO Douglas Co. United States	N Ridge Rd. / Miller Blvd. (39.36484, -104.81766)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 47.0915	Other (At-Grade) Single-Lane	2009	Free-flowing right-turn bypass lane on north leg. Year Completed estimated (2008-2011). ICD estimated from Google Maps linework.
Inwood, WV Berkeley Co. United States	SR 51 (Gerrardstown Rd.) / I-81 NB Ramps (39.36263, -78.04701)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x1 max)	2023	https://www.journal-news.net/news/local-news/official-phase-one-of-i-81-inwood-bypass-nearly-done/article_87d020ff-2d39-5835-8d9a-c25afa4402ea.html
Ross Township, OH Butler Co. United States	SR 748 (Millville Shandon Rd.) / Layhigh Rd. (39.36255, -84.69648)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 42.4761	Other (At-Grade) Single-Lane	2015	ICD estimated from Google Maps linework.
Inwood, WV Berkeley Co. United States	SR 51 (Gerrardstown Rd.) / I-81 SB Ramps / Arden-Nollville Rd. (39.36247, -78.04925)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x1 max)	2023	https://www.journal-news.net/news/local-news/official-phase-one-of-i-81-inwood-bypass-nearly-done/article_87d020ff-2d39-5835-8d9a-c25afa4402ea.html
West Chester Township, OH Butler Co. United States	Tylersville Rd. / Beckett Rd. / (parking) (39.36211, -84.45517)	Roundabout Existing	All-Way Yield Rectangular Rapid Flashing Beacon (RRFB)	3 Approaches 1 Driveways 45.7200	Other (At-Grade) Single-Lane	2023	This is the 40th roundabout in Butler County. The Butler County Engineer's Office has planned, designed, reviewed, or constructed 37 out of the 40.
Inwood, WV Berkeley Co. United States	SR 51 (Gerrardstown Rd.) / Pilgrim St. (39.36208, -78.04223)	Roundabout Existing	All-Way Yield At-grade Rail Crossing Signals/Gates (controlling approach only)	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2022	At-grade rail crossing approximately 200 ft east. Year Completed estimated (2021-2023).
Inwood, WV Berkeley Co. United States	Gerrardstown Rd. / Winchester Ave. (39.36098, -78.03754)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 49.8644	Other (At-Grade) Multilane (2 Lane, unspecified)	2018	ICD estimated from Google Maps linework.
Ijamsville, MD Frederick Co. United States	Whiskey Rd. / Whiskey Ct. (39.36078, -77.30012)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Castle Rock, CO Douglas Co. United States	Plum Creek Pkwy. / S Eaton Cir. / Eaton St. (39.36073, -104.83311)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 44.1960	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2020	Elliptical shaped. ICD = 145 ft x 115 ft. Year Completed estimated (2020-2021).
Inwood, WV Berkeley Co. United States	WV-51 / (unknown) (39.35929, -78.03503)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 53.5593	Other (At-Grade) Multilane (2 Lane, unspecified)	2018	ICD estimated from Google Maps linework.
Mason, OH Warren Co. United States	Mason Grand Dr. / Parkmoor Dr. / Skyview Dr. (39.35923, -84.27451)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands on four legs.
Reno, NV Washoe Co. United States	Myrtlewood Parklet (39.35885, -119.83477)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown		No splitter islands.
Reno, NV Washoe Co. United States	Piney Creek Parklet (39.35846, -119.83950)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Greensburg, IN Decatur Co. United States	W Veterans Way / N Memorial Dr. (39.35827, -85.50471)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 42.6720	Other (At-Grade) Single-Lane	2017	Year Completed estimated (2014-2019).
Young American, CO Douglas Co. United States	E Plum Creek Pkwy. / Lake Gulch Rd. / S Gilbert St. (39.35773, -104.84209)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 50.2920	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2020	Year Completed estimated (2019-2021).
West Chester Township, OH Butler Co. United States	Hutzelman Way / Plum Tree Dr. (39.35732, -84.46578)	Other Existing	All-Way Yield None	3 Approaches 0 Driveways 31.3977	Other (At-Grade) Single-Lane	2002	Painted splitter islands. ICD estimated from Google Maps linework.
Inwood, WV Berkeley Co. United States	Middleway Pike / WV-51 / Surveyor Dr. (39.35656, -78.03477)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 41.5563	Other (At-Grade) Multilane (2 Lane, unspecified)	2018	ICD estimated from Google Maps linework.
Reno, NV Washoe Co. United States	Douglas Fir Dr (39.35651, -119.84460)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
West Chester Township, OH Butler Co. United States	Dudley Dr. / University Dr. (39.35646, -84.36877)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 30.4746	Other (At-Grade) Single-Lane	2005	Painted splitter island on northwest leg. ICD estimated from Google Maps linework.
Morrow, OH Warren Co. United States	Hopewell Valley Dr. / Village View Ln. (39.35521, -84.15327)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 50.7920	Other (At-Grade) Single-Lane	2006	ICD estimated from Google Maps linework.
Castle Rock, CO Douglas Co. United States	S Ridge Rd. / Rapport Dr. (39.35511, -104.81475)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 32.0040	Other (At-Grade) Single-Lane	2020
Morrow, OH Warren Co. United States	Morrow-Cozaddale Rd. / (unknown) (39.35434, -84.16288)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 35.0931	Other (At-Grade) Single-Lane	2008	Year Completed estimated (2006-2009). ICD estimated from Google Maps linework.
Kearney, MO Clay Co. United States	W 19th St. / Sam Barr Dr. (future) (39.35391, -94.38445)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2023	North leg (Sam Barr Dr.) stubbed on opening in 2023. https://www.modot.org/interstate-35-interchange-improvements-clay
Kearney, MO Clay Co. United States	Nation Rd. / W 19th St. / NE 144th St. (39.35350, -94.38891)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2023	https://www.modot.org/interstate-35-interchange-improvements-clay
Kearney, MO Clay Co. United States	W 19th St. / Watson Dr. (39.35316, -94.37542)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2023	Designed for future expansion to multilane. https://www.modot.org/interstate-35-interchange-improvements-clay
Rende, Calabria Cosenza Italy	Via Guglielmo Marconi / A2 Ramps (39.35302, 16.23535)	Other Existing	All-Way Yield Unknown	3 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Single-Lane		Parking along circulatory roadway.
Platte City, MO Platte Co. United States	4th St. / Kentucky Ave. / Norma Ln. (39.35147, -94.77915)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2016	Year Completed estimated (2016-2017).
Rossville, MD Baltimore Co. United States	Franklin Square Dr. / Upton Cir. (39.35121, -76.48864)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
West Chester Township, OH Butler Co. United States	Smith Rd. / Beckett Rd. / Beckett Meadows Rd. (39.35097, -84.45265)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 45.2538	Other (At-Grade) Single-Lane	2018	Opened May 2018. Entering ADT = 18,670 vpd as of Sept 2018. ICD estimated from Google Maps linework.
Truckee, CA Nevada Co. United States	Prosser Dam Rd. / Henness Rd. (39.34961, -120.16790)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 29.5541	Other (At-Grade) Single-Lane	2006	ICD estimated from Google Maps linework.
Lisbon, MD Howard Co. United States	MD 94 / Old Frederick Rd. (Lisbon North) (39.34810, -77.06930)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 26.7839	Other (At-Grade) Single-Lane	1999	ICD estimated from Google Maps linework.
Rende, Calabria Cosenza Italy	Via Francesco e Carolina Principe (39.34637, 16.24618)	Roundabout Existing	All-Way Yield Unknown	2 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Rende, Calabria Cosenza Italy	SP90 / Via Giuseppe Verdi / Via Francesco e Carolina Princpe (39.34635, 16.24404)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, 2x1 max)
Truckee, CA Nevada Co. United States	Hwy 89 / Prosser Dam Rd. / Alder Dr. (39.34531, -120.17300)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 45.2574	Other (At-Grade) Single-Lane	2012	ICD estimated from Google Maps linework.
West Chester, OH Butler Co. United States	Lesourdsville West Chester Rd. / Becket Ridge Blvd. (39.34459, -84.41655)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 39.6240	Other (At-Grade) Single-Lane	2020	Near a junior high school. https://www.journal-news.com/news/newest-roundabout-opens-in-west-chester-as-dangerous-intersection-work-begins/PWKR73DU2VD53AOPGDM3VII2U4/
Reno, NV Washoe Co. United States	St. James Pkwy. / N Earlham Ct. (39.34445, -119.80783)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown		No splitter islands.
Urbana, MD Frederick Co. United States	Braidwood Dr. / Ethan Ridge Ave. (39.34386, -77.32911)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 41.1480	Other (At-Grade) Single-Lane	2009	Year Completed estimated (2008-2009).
Rende, Calabria Cosenza Italy	Via Londra / Via Mosca (39.34271, 16.23899)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Park Lane, MD Baltimore City United States	Pall Mall Rd. / Wylie Ave. / Edgecombe Cir. S (39.34212, -76.66482)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Parking along circulatory roadway.
Truckee, CA Nevada Co. United States	Hwy 89 / Henness Rd. / Donner Pass Rd. (39.34103, -120.17220)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 52.6496	Other (At-Grade) Multilane (2 Lane, unspecified)	2008	Functional Class: Arterial ICD estimated from Google Maps linework.
Knoxville, MD Frederick Co. United States	Burkittsville Rd. (MD 17) / US 340 WB Ramps (39.34056, -77.64052)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 37.8710	Freeway Ramps (Grade-Separated) Single-Lane	2010	Year Completed estimated (2009-2011). ICD estimated from Google Maps linework.
Urbana, MD Frederick Co. United States	Royal Crest Cir. / Aberdeen Way (39.34020, -77.33396)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Cooksville, MD Howard Co. United States	Long Corner Rd. / Penn Shop Rd. (39.33938, -77.15284)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 28.9560	Other (At-Grade) Single-Lane	2005	Year Completed estimated (1988-2005).
Platte City, MO Platte Co. United States	MO-N / NW 136 St. / Humphreys Rd. (39.33927, -94.77933)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2012	Year Completed estimated (2011-2012).
Rende, Calabria Cosenza Italy	Via Francesco e Carolina Principe / Via Vittorio Alfieri / Via Fratelli E.L. Salerno (39.33909, 16.24758)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Truckee, CA Nevada Co. United States	Donner Pass Rd. / Pioneer Trail Rd. (39.33904, -120.17360)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 44.3378	Other (At-Grade) Single-Lane	2010	ICD estimated from Google Maps linework.
Maineville, OH Warren Co. United States	Miami Bluffs Blvd. / Crossing Dr. (39.33828, -84.24190)	Other Existing	All-Way Stop Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands on north or south legs.
Medfield, MD Baltimore City United States	Weldon Ave. / Elsa Terrace (39.33803, -76.63881)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Parking along circulatory roadway; pedestrian access to central island.
Rosemont, MD Frederick Co. United States	MD 17 / MD 180 (39.33768, -77.63950)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 30.4828	Other (At-Grade) Single-Lane	2001	ICD estimated from Google Maps linework.
West Chester, OH Butler Co. United States	Butler Warren Rd. / Barret Rd. / Western Row Rd. (39.33709, -84.34926)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2021	On Butler County-Warren County line and West Chester/Mason city limit line.
Lisbon, MD Howard Co. United States	MD 94 / MD 144 (39.33700, -77.07360)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	1993	First roundabout in Maryland. Built initially as temporary, made permanent after one month.
Rende, Calabria Cosenza Italy	Via Don Minzoni / Via Carlo Bilotta / Corso Antonio Gramsci (39.33694, 16.24177)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, 2x1 max)
Rende, Calabria Cosenza Italy	Via Francesco e Carolina Principe / Via Corrado Alvaro (39.33687, 16.24802)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Baltimore, MD Baltimore City Co. United States	Canterbury Rd. / W 39th St. (39.33569, -76.62047)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 16.6275	Other (At-Grade) Single-lane w/ Traversable Central Island	2013	ICD estimated from Google Maps linework.
Urbana, MD Frederick Co. United States	Bush Creek Dr. / Major Smith Ln. (39.33507, -77.35263)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 28.6364	Other (At-Grade) Single-Lane	2000	ICD estimated from Google Maps linework.
Urbana, MD Frederick Co. United States	Sugarloaf Pkwy. / Denison St. (39.33490, -77.34180)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 36.9503	Other (At-Grade) Multilane (2 Lane, unspecified)	2000	ICD estimated from Google Maps linework.
Brunswick, MD Frederick Co. United States	MD 17 / Rosemont Drive / Dutchmans Creek (39.33480, -77.63671)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 43.4167	Other (At-Grade) Multilane (2 Lane, unspecified)	2010	ICD estimated from Google Maps linework.
Truckee, CA Nevada Co. United States	Donner Pass Rd. / Stockrest Spring Rd. (39.33476, -120.17472)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 1 Driveways 0.0000	Other (At-Grade) Unknown	2019
Harpers Ferry, WV Jefferson Co. United States	Gap View Blvd. / Gap View Blvd. (39.33462, -77.80635)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Urbana, MD Frederick Co. United States	Hartwick Ln. / Singleton Terrace (39.33399, -77.33970)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Mason, OH Warren Co. United States	Freedom Way / Veterans Pkwy. (39.33363, -84.30647)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 35.1035	Other (At-Grade) Single-Lane	2015	Third leg of intersection not connected yet ICD estimated from Google Maps linework.