Roundabouts Database Index

29616 Results

Search by location, intersection, and comments with the Quick Search below. You can search all other attributes by clicking Advanced Search. Sort results by clicking the headers of any column. Click the Intersection name for a details and aerial view. Search results pages can be bookmarked. Results can be exported to KML for viewing in Google Earth.

City, State County Country	Intersection (Lat, Lng)	Type Status	Control Type / Other Control Type	Approaches / Driveways / ICD (m)	Functional Class / LaneType	Year Completed	Comments
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
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.
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.
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.
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).
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. / 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).
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.
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	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.
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	Burnt HIll Trl. / Witch Hazel Way / Limestone Ct. (39.49486, -76.22046)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 33.1791	Other (At-Grade) Single-Lane	2008	ICD estimated from Google Maps linework.
Aberdeen, MD Harford Co. United States	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.
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.
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).
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/
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
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.
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.
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
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	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).
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.
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/
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 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.
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.
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	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.
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	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.
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
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
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
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
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.
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.
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.
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).
Franklin, IN Johnson Co. United States	E King St. / Eastview Dr. (39.48269, -86.03241)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 42.6720	Other (At-Grade) Single-Lane	2018	Right-turn-only lanes on north and east legs.
Franklin, IN Johnson Co. United States	SR 144 / SR 44 / Westview Dr. (39.48248, -86.08291)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown	2019	Year Completed estimated (2017-2020).
Abingdon, MD Harford Co. United States	Tollgate Rd. / Montrose Way (39.48198, -76.32751)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 28.5762	Other (At-Grade) Single-Lane	2003	Elementary school and library to north, another school to south. Functional Class: Collector ICD estimated from Google Maps linework.
Breckenridge, CO Summit Co. United States	S Park Ave. (CO 9) / Four O'clock Rd. (39.48043, -106.04811)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 34.1078	Other (At-Grade) Single-Lane	2017	Year Completed estimated (2015-2018). ICD estimated from Google Maps linework.
Fairmont, WV Marion Co. United States	WV 273 (State St.) / Elkins St. (39.47870, -80.13730)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 54.8637	Other (At-Grade) Multilane (2 Lane, unspecified)	2010	Detectable warning surfaces along entire length of narrow pedestrian ramp.
Abingdon, MD Harford Co. United States	Tollgate Rd. / Singer Rd. (39.47828, -76.32727)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 25.8121	Other (At-Grade) Single-Lane	1998	http://www.teachamerica.com/roundabouts/RA058B_ppr_Statmeyer.pdf#search=%22bel%20air%20roundabout%22 ICD estimated from Google Maps linework.
Middletown, DE New Castle Co. United States	Neverland Dr. / Whitebird Dr. / Carrick Ct. (39.47819, -75.63221)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Middletown, DE New Castle Co. United States	Marl Pit Rd. / Cedar Lane Rd. (39.47762, -75.70312)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020	https://www.middletowntranscript.com/story/news/2020/07/13/deldot-hopes-new-marl-pit-cedar-lane-roundabout-will-help-with-traffic/112217478/
Reisterstown, MD Baltimore Co. United States	Worthington Ave. / Greenspring Ave. / Tufton Ave. (39.47691, -76.76508)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 34.1095	Other (At-Grade) Multilane (2 Lane, unspecified)	2017	ICD estimated from Google Maps linework.
Fairmont, WV Marion Co. United States	WV 273 (State St.) / Haymond St. (39.47601, -80.13599)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 54.8640	Other (At-Grade) Multilane (2 Lane, unspecified)	2010	Detectable warning surfaces along entire length of narrow pedestrian ramp.
Bel Air South, MD Harford Co. United States	Abingdon Rd. / Dunbarton Dr. / Box Hill S Pkwy. (39.47491, -76.30092)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 25.8134	Other (At-Grade) Single-Lane	2006	Year Completed estimated (2005-2007). ICD estimated from Google Maps linework.
Martinsburg, WV Berkeley Co. United States	Tavern Rd. / Rock Cliff Dr. (39.47342, -77.97015)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2024	https://panhandlenewsnetwork.com/2024/04/05/bcems-director-offers-detours-as-rock-cliff-drive-tavern-road-intersection-closed-all-weekend-to-prep-for-roundabout/
Castle Pines, CO Douglas Co. United States	W Castle Pines Pkwy. / Pine Ridge Ln. / Buffalo Trl. (39.47283, -104.91386)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.4238	Other (At-Grade) Single-Lane	2009	Year Completed estimated (2008-2010). ICD estimated from Google Maps linework.
Middletown, DE New Castle Co. United States	W Middlepark Dr. / Idlewyld Dr. (39.47243, -75.70326)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Saint Clair, OH Butler Co. United States	Wayne Madison Rd. / Trenton Rd. (39.47196, -84.47733)	Roundabout Existing	All-Way Yield Other	4 Approaches 0 Driveways 62.4840	Other (At-Grade) Multilane (2 Lane, unspecified)	2021	Egg shaped. ICD = 205 ft x 180 ft. Railroad crossing approximately 900 feet to south with railroad queue detection on south leg of roundabout to limit roundabout blockage.
Reisterstown, MD Baltimore Co. United States	Long Ridge Rd. / Barto Ln. (39.47055, -76.73195)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Pedestrian access to central island.
Parker, CO Douglas Co. United States	Cross Canyon Trl. / Canyon Forge Dr. (39.47008, -104.85988)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 51.8160	Other (At-Grade) Single-Lane	2018	Year Completed estimated (2018-2019).
South Central, NV Washoe Co. United States	Piazza Villagio / Vista Favoloso (39.47002, -119.83304)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Reno, NV Washoe Co. United States	Ridgeview Dr. / Piaaza Villagio (39.46993, -119.83415)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Bel Air, MD Harford Co. United States	Tollgate Rd. / Westover Ln. / Crisfield Dr. (39.46859, -76.32162)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 26.7377	Other (At-Grade) Single-Lane	2002	http://www.teachamerica.com/roundabouts/RA058B_ppr_Statmeyer.pdf#search=%22bel%20air%20roundabout%22 Previously controlled by two-way stop Functional Class: Collector ICD estimated from Google Maps linework.
Abingdon, MD Harford Co. United States	Merchants Blvd. / Wegmans Blvd. (39.46815, -76.30901)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 29.5039	Other (At-Grade) Single-Lane	2012	ICD estimated from Google Maps linework.
Castle Pines, CO Douglas Co. United States	Lagae Rd. / Hyland Hills Rd. (39.46753, -104.88126)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 41.4902	Other (At-Grade) Multilane (2 Lane, unspecified)	2018	ICD estimated from Google Maps linework.
Reno, NV Washoe Co. United States	Neill Rd. / Kietzke Ln. (39.46721, -119.79120)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 52.5545	Other (At-Grade) Multilane (2 Lane, unspecified)	2007	ICD estimated from Google Maps linework.
The Legends, DE New Castle Co. United States	West Wittington Circle (39.46705, -75.71358)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Pedestrian facility in central island.
Middletown, DE New Castle Co. United States	Brick Mill Circle (39.46632, -75.69145)	Other Existing	Unknown Unknown	4 Approaches 9 Driveways 0.0000	Other (At-Grade) Single-Lane
St. Clair Township, OH Butler Co. United States	Hamilton Trenton Rd. / Riverside Dr. / Busenbark Rd. / (parking lot) (39.46565, -84.48671)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 38.7252	Other (At-Grade) Single-Lane	2011	ICD estimated from Google Maps linework.
Owings Mills, MD Baltimore Co. United States	Foxcreek Ct. (39.46537, -76.75334)	Other Existing	Unknown Unknown	3 Approaches 1 Driveways 0.0000	Other (At-Grade) Unknown
The Legends, DE New Castle Co. United States	Wittington Way / Casper Way / Sheehan Dr. (39.46536, -75.70967)	Other Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Pedestrian facility in central island.
Middletown, OH Warren Co. United States	Union Rd. / Greentree Rd. (39.46532, -84.31978)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 36.8813	Other (At-Grade) Single-Lane	2017	ICD estimated from Google Maps linework.
Bel Air South, MD Harford Co. United States	Woodsdale Rd. / Box Hill Corporate Center Dr. / (parking) (39.46498, -76.31016)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2014	Year Completed estimated (2013-2015).
Cockeysville, MD Baltimore Co. United States	Lord Byron Ln. / Duke of York Ln. (39.46487, -76.63164)	Other Existing	Unknown Unknown	3 Approaches 1 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Nelsonville, OH Athens Co. United States	W Washington St. / John Lloyd Evans Dr. / Diamond Brick Rd. (39.46440, -82.25096)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2012
Terre Haute, IN Vigo Co. United States	IN-42 / Swalls Dr. (39.46157, -87.28667)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.8833	Other (At-Grade) Single-Lane	2013	Year Completed estimated (2011-2014). ICD estimated from Google Maps linework.
Owings Mills, MD Baltimore Co. United States	Worthington Rd. / Hunters Glen (39.46145, -76.74231)	Other Existing	Unknown Unknown	3 Approaches 1 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Castle Pines, CO Douglas Co. United States	Lagae Rd. / Monarch Blvd. (39.46134, -104.87935)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 36.8834	Other (At-Grade) Multilane (2 Lane, unspecified)	2018	ICD estimated from Google Maps linework.
Kingsville, MD Baltimore Co. United States	MD 147 (Harford Rd.) / Glen Arm Rd. / Mt Vista Rd. (39.46045, -76.45652)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 35.0397	Other (At-Grade) Single-Lane	2018	https://www.baltimoresun.com/maryland/harford/aegis/ph-ag-harford-road-roundabout-20180102-story.html ICD estimated from Google Maps linework.
Wormans Mill, MD Frederick Co. United States	Palatine Dr. / Island Grove Blvd. (39.46038, -77.38314)	Other Existing	Unknown Unknown	3 Approaches 3 Driveways 0.0000	Other (At-Grade) Single-Lane		Pedestrian access to central island. No splitter islands.
St. Clair Township, OH Butler Co. United States	Jacksonburg Rd. / Morganthaler Rd. (39.46012, -84.52261)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 35.0399	Other (At-Grade) Single-Lane	2010	ICD estimated from Google Maps linework.
Castle Pines, CO Douglas Co. United States	Westbridge Dr. / Cross Canyon Trl. (39.45951, -104.85287)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 50.2920	Other (At-Grade) Single-Lane	2019	Year Completed estimated (2018-2019).
Middletown, DE New Castle Co. United States	Bunker Hill Rd. / Choptank Rd. (39.45790, -75.74350)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 31.3525	Other (At-Grade) Single-Lane	2007	Rural, redesigned in 2008 to better accommodate trucks and farm equipment. ICD estimated from Google Maps linework.
Abingdon, MD Harford Co. United States	Tewkesbury Rd. / Shrewsbury Rd. (39.45775, -76.27273)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 49.7952	Other (At-Grade) Single-Lane	2003	Year Completed estimated (2003-2004). http://onlinepubs.trb.org/Onlinepubs/circulars/ec083/68_Statmeyerpaper.pdf ICD estimated from Google Maps linework.
Bel Air, MD Harford Co. United States	Constant Friendship Blvd. / BJ's (39.45546, -76.31870)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 29.5092	Other (At-Grade) Single-Lane	1995	Functional Class: Local ICD estimated from Google Maps linework.
Middletown, DE New Castle Co. United States	Brick Mill Rd. / Dove Run Centre Dr. (39.45413, -75.68672)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 24.3840	Other (At-Grade) Single-lane w/ Traversable Central Island	2022
Abingdon, MD Harford Co. United States	Four Seasons Dr. / Raking Leaf Dr. / Raking Leaf Dr. / Indian Summer Ct. (39.45387, -76.28951)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2006	Painted splitter islands. Pedestrian crossings at entrance lines. Year Completed estimated (2005-2007).
Middletown, DE New Castle Co. United States	Gloucester Blvd. / Hampton Rd. (39.45210, -75.68096)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 35.0439	Other (At-Grade) Single-Lane	2009	ICD estimated from Google Maps linework.
Middletown, DE New Castle Co. United States	Spring Arbor Dr. / Trellis Ln. (39.45194, -75.73915)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Mays Chapel, MD Baltimore Co. United States	Ridgemont Rd. (39.45142, -76.69629)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Frederick, MD Frederick Co. United States	Greenleese Circle (39.44847, -77.37242)	Other Existing	Unknown Unknown	2 Approaches 1 Driveways 0.0000	Other (At-Grade) Single-Lane
Middletown, DE New Castle Co. United States	S Ridge Ave / Private Driveway (39.44821, -75.73234)	Roundabout Existing	Unknown None	4 Approaches 0 Driveways 40.5794	Other (At-Grade) Single-Lane	2009	ICD estimated from Google Maps linework.
Middletown, MD Frederick Co. United States	Smithfield Dr. / Layla Dr. / Hoffman Dr. (39.44814, -77.52097)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Fort Bragg, CA Mendocino Co. United States	E Fir St. / N Harrison St. (39.44803, -123.80204)	Traffic Calming Circle Removed	One-Way/Two-Way Stop None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2019	From the City of Fort Bragg: "The City installed a small neighborhood traffic calming circle in about 2012 on E Fir Street at N Harrison Street. Unfortunately, due to many years of complaints as well as traffic collision increases at the intersection, the roundabout was removed in 2019. It is still shown in Google Maps but it is removed now and replaced with at 4-way stop intersection."
Frederick, MD Frederick Co. United States	W Whitecoat Dr. (39.44784, -77.43031)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Frederick, MD Frederick Co. United States	E Whitecoat Dr. (39.44779, -77.42925)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Frederick, MD Frederick Co. United States	Amber Dr. / Campus Dr. (39.44702, -77.42000)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 45.7200	Other (At-Grade) Multilane (2 Lane, unspecified)	2013	Year Completed estimated (2013-2015). Mismatch between approach lane designations and circulatory roadway striping. Inside lane from east leg must make U-turn unless the driver changes lanes.
Frederick, MD Frederick Co. United States	W Huff Blvd. (39.44689, -77.43046)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Frederick, MD Frederick Co. United States	E Huff Blvd. (39.44685, -77.42933)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Frederick, MD Frederick Co. United States	E Fagan Dr. (39.44594, -77.42928)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Frederick, MD Frederick Co. United States	W Fagan Ln. (39.44591, -77.43047)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Mays Chapel, MD Baltimore Co. United States	Dipping Pond Ct. (39.44447, -76.71101)	Other Existing	Unknown Unknown	2 Approaches 3 Driveways 0.0000	Other (At-Grade) Single-Lane
St. Clair Township, OH Butler Co. United States	Eaton Rd. / Beissinger Rd. (39.44294, -84.58301)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6602	Other (At-Grade) Single-Lane	2015	ICD estimated from Google Maps linework.
Terre Haute, IN Vigo Co. United States	Antioch Cir. / Antioch Cir. Access Road (39.44227, -87.33917)	Other Existing	Unknown None	3 Approaches 0 Driveways 25.8255	Other (At-Grade) Single-Lane		Parking in circulatory roadway. ICD estimated from Google Maps linework.