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
Kansas City, MO Clay Co. United States	N Maplewoods Pkwy. / New Mark Dr. / NE 100th St. (39.27475, -94.55715)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 45.7200	Other (At-Grade) Single-Lane	2021	https://www.kcmo.gov/Home/Components/FacilityDirectory/FacilityDirectory/139/360?npage=2
West Friendship, MD Howard Co. United States	Burntwoods Rd. / Andrea Dr. / MD 32 NB Ramps (39.27321, -76.98627)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 35.1338	Freeway Ramps (Grade-Separated) Single-Lane	2008	ICD estimated from Google Maps linework.
Glenelg, MD Howard Co. United States	Burntwoods Rd. (MD 932B) / Ten Oaks Rd. (MD 932C) (39.27315, -76.98805)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 37.9074	Other (At-Grade) Single-Lane	2008	ICD estimated from Google Maps linework.
Kansas City, MO Platte Co. United States	NW Skyview Ave. / NW Tiffany Springs Pkwy. (39.27313, -94.65420)	Rotary Existing	All-Way Yield None	4 Approaches 0 Driveways 132.2141	Other (At-Grade) Multilane (2 Lane, unspecified)		ICD estimated from Google Maps linework.
Kansas City, MO Platte Co. United States	N Ambassador Dr. / NW Tiffany Springs Pkwy. (39.27269, -94.66401)	Rotary Existing	All-Way Yield None	3 Approaches 0 Driveways 101.7038	Other (At-Grade) Multilane (2 Lane, unspecified)		Converted rotary. ICD estimated from Google Maps linework.
Larkspur, CO Douglas Co. United States	Bear Dance Dr. / Sky View Ln. / Elk View Rd. / Lake Dr. (39.27054, -104.90711)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 31.4367	Other (At-Grade) Single-Lane	2003	Year Completed estimated (2002-2004). ICD estimated from Google Maps linework.
Charles Town, WV Jefferson Co. United States	Haversack Circle (39.27053, -77.84909)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Kansas City, MO Clay Co. United States	Tiffany Springs Pkwy. / NW 96th St. / US 169 NB Ramps (39.26998, -94.58361)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 41.6077	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2013	ICD estimated from Google Maps linework.
Kansas City, MO Clay Co. United States	NW 96th St. / US 169 SB Ramps (39.26994, -94.58598)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 40.6831	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2013	ICD estimated from Google Maps linework.
Kansas City, MO Clay Co. United States	NW 96th St. / N Summit St. (39.26988, -94.58925)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 41.6078	Other (At-Grade) Multilane (2 Lane, unspecified)	2013	ICD estimated from Google Maps linework.
Meadowbrook Heights, MO Clay Co. United States	Tiffany Springs Pkwy (39.26919, -94.58184)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Baltimore, MD Baltimore City United States	Whetstone Way / (parking) (39.26820, -76.60021)	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	N Maplewoods Pkwy. / NE 96th St. (39.26747, -94.55716)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 45.7200	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2021	East leg stubbed. https://www.kcmo.gov/Home/Components/FacilityDirectory/FacilityDirectory/139/360?npage=2
Kansas City, MO Clay Co. United States	N Shoal Creek Pkwy / N Eastern Ave (39.26697, -94.49252)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 82.2943	Other (At-Grade) Multilane (2 Lane, unspecified)	2011	ICD estimated from Google Maps linework.
Charles Town, WV Jefferson Co. United States	Ball Circle (39.26676, -77.87701)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Kansas City, MO Clay Co. United States	N Shoal Creek Pkwy / NE 96th St (39.26609, -94.48916)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 72.1240	Other (At-Grade) Multilane (2 Lane, unspecified)	2008	ICD estimated from Google Maps linework.
Bloomington, IN Monroe Co. United States	Sample Rd. / N Frontage Rd. W / I-69 SB Ramps (39.26595, -86.52428)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 38.1000	Freeway Ramps (Grade-Separated) Single-Lane	2017	Year Completed estimated (2016-2019).
Bloomington, IN Monroe Co. United States	Sample Rd. / I-69 NB Ramps (39.26581, -86.52203)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 38.1000	Freeway Ramps (Grade-Separated) Single-Lane	2017	Year Completed estimated (2016-2019).
Bloomington, IN Monroe Co. United States	Sample Rd. / N Wayport Rd. / N Frontage Rd. E (39.26549, -86.51969)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 38.1000	Other (At-Grade) Single-Lane	2017	Year Completed estimated (2016-2019).
Millington, MD Kent Co. United States	MD 291 / US 301 SB Ramps (39.26463, -75.86641)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 31.4393	Freeway Ramps (Grade-Separated) Single-Lane	1999	Opened August 1999. ICD estimated from Google Maps linework.
Glenelg, MD Howard Co. United States	Triadelphia Rd. / Ten Oaks Rd. (39.26399, -76.98621)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 32.0040	Other (At-Grade) Single-Lane	2000	Year Completed estimated (1992-2002).
Millington, MD Kent Co. United States	MD 291 / US 301 NB Ramps (39.26386, -75.86260)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 28.6656	Freeway Ramps (Grade-Separated) Single-Lane	1999	Opened August 1999. ICD estimated from Google Maps linework.
Charles Town, WV Jefferson Co. United States	Prospect Hill Blvd. / Butler St. (39.26299, -77.87787)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Coves North, MO Platte Co. United States	NW Old Tiffany Springs Rd. / N Green Hills Rd. (39.26253, -94.63089)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 44.3863	Other (At-Grade) Multilane (2 Lane, unspecified)	2015	Elliptical shape. https://www.linecreekloudmouth.com/blog/street-improvements/ ICD estimated from Google Maps linework.
Romeira, Santarém Santarém Portugal	N114 / N3 (39.26012, -8.72073)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Catonsville, MD Baltimore Co. United States	Hidden Bludd Cir. / Jacks Ct. (39.25966, -76.71926)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Kansas City, MO Platte Co. United States	Line Creek Pkwy. / Tiffany Springs Rd. (39.25957, -94.61010)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 51.8160	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2021
Ellicott City, MD Howard Co. United States	College Ave. / Bending Sky Way (39.25754, -76.79122)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 26.8186	Other (At-Grade) Single-Lane	2012	ICD estimated from Google Maps linework.
Catonsville, MD Baltimore Co. United States	MD 372 / Hilltop Rd. / Entrance to UMBC (39.25733, -76.71964)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 35.1417	Other (At-Grade) Single-Lane	1998	Functional Class: Collector ICD estimated from Google Maps linework.
Kansas City, MO Platte Co. United States	N Congress Ave. / MO-152 WB On-ramp / NW 96th Terr. (39.25531, -94.66793)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 55.4886	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2005	ICD estimated from Google Maps linework.
Harrison, OH Hamilton Co. United States	Dry Fork Rd. / West Rd. (39.25461, -84.76702)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 33.5280	Other (At-Grade) Single-Lane	2021	Next to high school and junior high school. https://www.facebook.com/CityofHarrison/photos/a.155847067781927/4751915121508409/?type=3&source=48
Kansas City, MO Platte Co. United States	N Congress Ave. / MO-152 EB Off-ramp / N Serene Ave. (39.25328, -94.66808)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 51.7908	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2005	ICD estimated from Google Maps linework.
Kansas City, MO Platte Co. United States	N Serene Ave. / NW Prairie View Rd. (39.25268, -94.66677)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 29.5950	Other (At-Grade) Single-Lane	2005	ICD estimated from Google Maps linework.
Monserrato, Sardinia Cagliari Italy	Via Riu Mortu / Via Cesare Cabras / Viale Trieste / Via Giuseppe Zuddas (39.25227, 9.14655)	Other Existing	Other Unknown	5 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, 2x2 max)		Mix of stop and yield control on entry.
Catonsville, MD Baltimore Co. United States	Hilltop Cir. / UMBC Blvd. (39.25178, -76.71442)	Rotary Existing	All-Way Yield None	4 Approaches 0 Driveways 60.1156	Other (At-Grade) Multilane (2 Lane, unspecified)	2015	Lane changes needed for some through movements. ICD estimated from Google Maps linework.
Blue Ash, OH Hamilton Co. United States	Glendale Milford Rd. / Lake Forest Dr. / Summit Pl. (39.25169, -84.38466)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 50.8671	Other (At-Grade) Multilane (2 Lane, unspecified)	2019	ICD estimated from Google Maps linework.
Incline Village, NV Washoe Co. United States	SR 28 (Tahoe Blvd.) / SR 431 (Mt Rose Hwy.) (39.25146, -119.97321)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 39.7690	Other (At-Grade) Single-Lane	2012	Reduced from two entering lanes (LT only, TH only) on west leg to one lane in 2015-2016. Now single-lane roundabout. ICD estimated from Google Maps linework.
Selargius, Sardinia Cagliari Italy	Via Giuseppe Peretti / Via Araolla / Piazzale Alessandro Ricchi (39.25098, 9.10911)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, 2x2 max)
Ellicott City, MD Howard Co. United States	Hillsborough Rd. / English Morning Ln. (39.25046, -76.79507)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Ellicott City, MD Howard Co. United States	Academy Rd. / Hillsborough Rd. / Chews Vineyard (39.24993, -76.78913)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
West Friendship, MD Howard Co. United States	Folly Quarter Rd. / Sheppard Ln. / Homewood Rd. (39.24979, -76.93188)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 33.5280	Other (At-Grade) Single-Lane	2004	Year Completed estimated (2002-2005).
Cagliari, Sardinia Cagliari Italy	Via Giuseppe Peretti / Via Stamira / SS131dir (Circonvallazione Quadrifoglio) Ramps (39.24951, 9.11493)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)
Ellicott City, MD Howard Co. United States	Columbia Rd. / Hemlock Cone Way / Kingscup Ct. (39.24949, -76.83326)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 21.3360	Other (At-Grade) Single-lane w/ Traversable Central Island	2019
Catonsville, MD Baltimore Co. United States	UMBC Blvd. / Research Park Dr. (39.24874, -76.71580)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 44.3950	Other (At-Grade) Single-Lane	2015	Elliptical shape. ICD estimated from Google Maps linework.
Catonsville, MD Baltimore Co. United States	Research Park Dr. (39.24868, -76.71406)	Other Existing	Uncontrolled Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Montgomery, OH Hamilton Co. United States	Pfeiffer Rd. / Deerfield Rd. (39.24866, -84.35092)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2023	https://www.facebook.com/story.php/?story_fbid=602452425250045&id=100064558789263
Kansas City, MO Clay Co. United States	N Sycamore Ave. / N 85th Terr. / Shoal Creek Valley Dr. (39.24733, -94.48586)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 60.9600	Other (At-Grade) Single-Lane	2002	No truck apron. Year Completed estimated (1997-2003).
Quartucciu, Sardinia Cagliari Italy	Via delle Serre / Via Segre (39.24684, 9.16501)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, 2x1 max)
Kansas City, MO Clay Co. United States	NE Shoal Creek Valley Dr. / (unknown) (39.24673, -94.47459)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2020
Liberty, MO Clay Co. United States	N Stewart Rd. / College St. / Conistor Ln. / (parking) (39.24629, -94.45100)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2002	Year Completed estimated (1997-2003).
Liberty, MO Clay Co. United States	College St. / N Blue Jay Dr. (39.24628, -94.44898)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2005
Kansas City, MO Clay Co. United States	N Booth Ave. / NE Shoal Creek Valley Dr. / Commercial Dr. (39.24626, -94.47674)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 44.1960	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2020	Yield-controlled right-turn bypass lane on west leg. Year Completed estimated (2020-20210.
Ellicott City, MD Howard Co. United States	Nightingale Ct. / Academy Rd. (39.24564, -76.79297)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
West Friendship, MD Howard Co. United States	Castlebridge Rd. / Hunter's View Rd. (39.24552, -76.90189)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 42.6720	Other (At-Grade) Single-Lane	2006
Dundalk, MD Baltimore Co. United States	Dundalk Ave. / Sollers Point Rd. (39.24534, -76.50786)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 24.9734	Other (At-Grade) Single-Lane	2007	ICD estimated from Google Maps linework.
Liberty, MO Clay Co. United States	S Stewart Rd. / (parking) (39.24344, -94.45337)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 33.5277	Other (At-Grade) Single-Lane	2016	Add-lane right-turn bypass lane on south leg.
Blue Ash, OH Hamilton Co. United States	Plainfield Rd. / Parkview Dr. (39.24335, -84.39561)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 18.4993	Other (At-Grade) Single-Lane	2018	http://www.blueash.com/departments/public_works/roundabout_safety.php ICD estimated from Google Maps linework.
Kansas City, MO Clay Co. United States	NE 82nd Terr. / N Booth Ave. (39.24250, -94.47752)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 53.3400	Other (At-Grade) Multilane (2 Lane, unspecified)	2008	South leg stubbed.
Cagliari, Sardinia Cagliari Italy	Via Edward Jenner / (connector to SS131dir) (39.24238, 9.11694)	Other Existing	All-Way Stop Unknown	3 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Clarksburg, MD Montgomery Co. United States	Granite Rock Rd. / Grand Elm St. (39.24126, -77.26647)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Blue Ash, OH Hamilton Co. United States	Malsbary Rd. / Alliance Rd. (39.23916, -84.38188)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 34.2258	Other (At-Grade) Single-Lane	2017	http://www.blueash.com/departments/public_works/roundabout_safety.php ICD estimated from Google Maps linework.
Kings Beach, CA Placer Co. United States	N Lake Blvd. / Bear Ave. / Brook Ave. / (beach parking) (39.23681, -120.02465)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 24.0514	Other (At-Grade) Single-Lane	2014	ICD estimated from Google Maps linework.
Clarksburg, MD Montgomery Co. United States	Saint Clair Rd. / Timber Creek Ln. / Brewers Tavern Terrace / (unknown) (39.23680, -77.27531)	Other Existing	Unknown Unknown	5 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Kings Beach, CA Placer Co. United States	N Lake Blvd. / Coon St. (39.23589, -120.02207)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 29.6021	Other (At-Grade) Single-Lane	2014	ICD estimated from Google Maps linework.
Grass Valley, CA Nevada Co. United States	Sierra College Dr. / Litton Dr. / Robert Ross Way (39.23445, -121.05200)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 32.3780	Other (At-Grade) Single-Lane	2003	ICD estimated from Google Maps linework.
Grass Valley, CA Nevada Co. United States	Olympia Park Cir. / (parking lot) (39.23248, -121.03766)	Roundabout Existing	All-Way Yield None	2 Approaches 1 Driveways 22.8600	Other (At-Grade) Single-lane w/ Traversable Central Island	2014	All paint, no raised islands. Opened November 2014. Previously, Olympia Park Circle made a gentle 90-degree curve. Traffic entering from stop-controlled driveway had trouble making left turn as they had to proceed 60 feet to reach the safety of centerline without knowing if approaching vehicle on their left was going to enter the driveway or curve left in front of them. Now about 50% of driveway exits cheat across the central island, but it works just fine. After six years with no raised islands, a central island was built on 3 Nov 2020: 20 feet in diameter, 4 inches high, designed for asphalt but built with PCC.
Clarksville, MD Howard Co. United States	Northern Bell Way / Bee Frances Way / Catherine Close Rd. (39.23232, -76.97091)	Other Existing	Unknown Unknown	3 Approaches 1 Driveways 0.0000	Other (At-Grade) Single-Lane
Clarksburg, MD Montgomery Co. United States	Little Seneca Pkwy. / Meadow Mist Rd. (39.23154, -77.24309)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.5290	Other (At-Grade) Single-Lane	2011	ICD estimated from Google Maps linework.
Kansas City, MO Clay Co. United States	NE Flintlock Rd / NE 76th St (39.23094, -94.47007)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 57.3581	Other (At-Grade) Multilane (2 Lane, unspecified)	2013	ICD estimated from Google Maps linework.
Blue Ash, OH Hamilton Co. United States	Plainfield Rd. / Peppermill Ln. / Reed-Hartman Hwy. (39.23083, -84.39482)	Roundabout Existing	All-Way Yield Rectangular Rapid Flashing Beacon (RRFB)	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2023	RRFB on all four legs. https://www.blueash.com/departments/public_works/hunt_plainfield.php
Quartu Sant’Elena, Sardinia Cagliari Italy	SP17 / SP17ter / Viale Europa / Via Flume (39.23079, 9.22086)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, 2x2 max)
Clarksburg, MD Montgomery Co. United States	Little Seneca Pkwy. / Snowden Farm Pkwy. (39.22989, -77.25280)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 28.6795	Other (At-Grade) Multilane (2 Lane, unspecified)	2012	Year Completed estimated (2011-2013). ICD estimated from Google Maps linework.
Clarksville, MD Howard Co. United States	Linden Church Rd. / MD 32 NB Ramps (39.22942, -76.97263)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 39.6240	Freeway Ramps (Grade-Separated) Single-Lane	2013	Year Completed estimated (2011-2014).
Clarksville, MD Howard Co. United States	Watkins Bridge Ln. / Holly Creek Ln. (39.22939, -76.94583)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2010
Clarksville, MD Howard Co. United States	Preakness Circle Ln. / Watkins Bridge Ln. (39.22880, -76.94308)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 30.4800	Other (At-Grade) Single-Lane	2010
Clarksburg, MD Montgomery Co. United States	Clarksburg Rd. (MD 121) / (outlet mall entrance) (39.22844, -77.28869)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 49.9588	Other (At-Grade) Multilane (2 Lane, unspecified)	2015	ICD estimated from Google Maps linework.
Blue Ash, OH Hamilton Co. United States	Hunt Rd. / Plainfield Rd. (39.22691, -84.39426)	Roundabout Existing	All-Way Yield Rectangular Rapid Flashing Beacon (RRFB)	4 Approaches 0 Driveways 53.0352	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2023	https://www.wcpo.com/news/local-news/hamilton-county/blue-ash/blue-ash-police-new-roundabout-while-confusing-some-is-reducing-crashes
Clarksburg, MD Montgomery Co. United States	Clarksburg Rd. (MD 121) / Cabin Branch Ave. (39.22689, -77.29051)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 46.2592	Other (At-Grade) Multilane (2 Lane, unspecified)	2015	ICD estimated from Google Maps linework.
Clarksville, MD Howard Co. United States	Running Fence Ln. / Preakness Circle Ln. (39.22640, -76.94374)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2010
Clarksburg, MD Montgomery Co. United States	Snowden Farm Pkwy. / Winding Woods Way (39.22604, -77.24727)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 40.7086	Other (At-Grade) Multilane (2 Lane, unspecified)	2012	Year Completed estimated (2011-2013). ICD estimated from Google Maps linework.
Blue Ash, OH Hamilton Co. United States	Hunt Rd. / (parking) (39.22578, -84.39828)	Roundabout Existing	All-Way Yield Rectangular Rapid Flashing Beacon (RRFB)	3 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2022	Opened February 2, 2022. https://www.blueash.com/departments/public_works/hunt_plainfield.php
Snowmass Village, CO Pitkin Co. United States	Brush Creek Rd. / Highline Rd. (39.22541, -106.92049)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 38.1000	Other (At-Grade) Single-Lane	2006
Kansas City, MO Platte Co. United States	MO-45 (Tom Watson Pkwy.) / NW Brink-Myer Rd. (39.22507, -94.75656)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 45.3352	Other (At-Grade) Multilane (2 Lane, unspecified)	2017	ICD estimated from Google Maps linework.
Kansas City, MO Platte Co. United States	NW 72nd St. / NW Waukomis Dr. / N Green Hills Rd. (39.22505, -94.62750)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 34.2327	Other (At-Grade) Single-Lane	2012	Streetview car went through just after completion while two approaches were still blocked off. ICD estimated from Google Maps linework.
Kansas City, MO Platte Co. United States	NW 72nd St. / N Overland Dr. (39.22495, -94.64044)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020	https://www.kcmo.gov/Home/Components/FacilityDirectory/FacilityDirectory/53/360?npage=2
Ellicott City, MD Howard Co. United States	MD 104 (Waterloo Rd.) / MD 100 WB Ramps (39.22470, -76.80600)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 45.7200	Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max)	1999
Quartu Sant’Elena, Sardinia Cagliari Italy	Viale Lungomare del Golfo / Viale Cristoforo Colombo / (parking) (39.22372, 9.19555)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 1 Driveways	Other (At-Grade) Multilane (2 Lane, 2x1 max)
Montgomery, OH Hamilton Co. United States	US 22 (Montgomery Rd.) / SR 126 (Ronald Reagan Cross Country Hwy.) (39.22308, -84.35643)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (3+ Lane)	2021	Previously a grade-separated freeway interchange. https://m.facebook.com/CityofMontgomeryOhio/videos/352303629903240/
Stephenson, VA Frederick Co. United States	Northumberland Dr. / Churndash Way / Patchwork Dr. (39.22289, -78.09317)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2017	No pavement markings or splitter islands as of October 2017.
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.
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.