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
Clarksburg, MD Montgomery Co. United States	Clarksburg Rd. / W Old Baltimore Rd. (39.21396, -77.29731)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 42.6720	Other (At-Grade) Single-Lane	2019	Year Completed estimated (2019-2020).
New Market, MD Frederick Co. United States	Empire Blvd. / Edwardian Ln. / Jacobian Pl. (39.39428, -77.29567)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Parking along circulatory roadway.
Linganore, MD Frederick Co. United States	Finn Dr. / Douglas Ave. / Huckleberry Way (39.40210, -77.29509)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Pedestrian access to central island. No splitter islands.
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.
Woodbridge, VA Prince William Co. United States	Anchor Bend Circle (38.59517, -77.28977)	Other Existing	Unknown Unknown	2 Approaches 12 Driveways 0.0000	Other (At-Grade) Unknown
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.
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.
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.
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.
Woodbridge, VA Prince William Co. United States	Potomac Branch Dr. / Oberlin Dr. / Barkham Dr. / Weeburn Way / Cadbury Way (38.63114, -77.28082)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Shortsville, NY Ontario Co. United States	CR 28 / Shortsville Rd. (42.95597, -77.27692)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020	https://www.democratandchronicle.com/story/news/2020/10/19/roundabout-opens-county-road-28-and-shortsville-road-farmington-ny/3706261001/
Germantown, MD Montgomery Co. United States	Kildale Hills Terrace / Galway Bay Cir. (39.17826, -77.27643)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
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.
Germantown, MD Montgomery Co. United States	Wonderland Way / Chalet Dr. (39.15516, -77.27464)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Germantown, MD Montgomery Co. United States	Crystal Rock Dr. / Century Blvd. (39.20326, -77.27356)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 48.7680	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2015	Striping added 2019-2021. Inconsistent lane use markings between entry and circulatory roadway.
Oakton, VA Fairfax Co. United States	Saintsbury Dr. / (transit center parking garage) (38.87600, -77.27317)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2013	Serves Metro station. Right-turn-only lanes on northeast and southwest legs. Southeast leg stubbed. Year Completed estimated (2012-2014).
Germantown, MD Montgomery Co. United States	Pickering Dr. / Pickering Pl. (39.18854, -77.27173)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Germantown, MD Montgomery Co. United States	Club Hill Dr. / Thackery Pl. (39.18531, -77.27012)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Oakton, VA Fairfax Co. United States	Saintsbury Dr. / (transit center parking lot) (38.87667, -77.26993)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 35.0520	Other (At-Grade) Single-Lane	2013	Serves Metro station. Right-turn-only lanes on east and west legs. South leg stubbed. Year Completed estimated (2012-2014).
Oakton, VA Fairfax Co. United States	Nutley St. SW / I-66 WB Exit Ramp (38.87982, -77.26743)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x1 max)	2023	Replaces full cloverleaf interchange. https://outside.transform66.org/about_the_project/project_sections/nutley.asp
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.
Oakton, VA Fairfax Co. United States	Nutley St. SW / I-66 EB Exit Ramp (38.87714, -77.26629)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x1 max)	2023	Replaced full cloverleaf interchange. https://outside.transform66.org/about_the_project/project_sections/nutley.asp
Vienna, VA Fairfax Co. United States	Park St. SE / Locust St. SE (38.90205, -77.26091)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 14.8712	Other (At-Grade) Single-lane w/ Traversable Central Island	2018	Year Completed estimated (2016-2018). ICD estimated from Google Maps linework.
Germantown, MD Montgomery Co. United States	Milestone Manor Ln. / Royal Crown Dr. (39.20518, -77.25877)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
(unincorporated), MD Montgomery Co. United States	Travilah Rd. / Turkey Foot Rd. / Hanson Farm Dr. (39.07993, -77.25560)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 33.5280	Other (At-Grade) Single-Lane	2020	Painted splitter islands. Year Completed estimated (2019-2020).
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.
Germantown, MD Montgomery Co. United States	Milestone Manor Ln. / Emerald Dr. (39.20479, -77.25262)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Germantown, MD Montgomery Co. United States	Milestone Manor Ln. / Stardrift Dr. (39.20560, -77.25039)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Germantown, MD Montgomery Co. United States	Milestone Manor Ln. / Manor View Cir. / Milestone Manor Ct. (39.20854, -77.24868)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
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.
Canandaigua, NY Ontario Co. United States	CR 10 / CR 4 (42.90187, -77.24570)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 33.2451	Other (At-Grade) Single-Lane	2013	ICD estimated from Google Maps linework.
Germantown, MD Montgomery Co. United States	Observation Dr. / Goldenrod Ln. (39.18419, -77.24566)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 45.7200	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2013	Year Completed estimated (2012-2014).
Canandaigua, NY Ontario Co. United States	CR 10 / CR 46 (42.88665, -77.24563)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 31.5031	Other (At-Grade) Single-Lane	2013	ICD estimated from Google Maps linework.
Germantown, MD Montgomery Co. United States	Summer Oak Dr. / Summer Oak Ct. (39.16467, -77.24384)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands on two legs.
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.
Gaithersburg, MD Montgomery Co. United States	Kentlands Blvd. / Main St. (39.12333, -77.23855)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 42.6720	Other (At-Grade) Multilane (2 Lane, 2x1 max)	1994	Year Completed estimated (1993-2002).
Woodbridge, VA Prince William Co. United States	Belmont Bay Dr. / Palisades St. (38.65612, -77.23753)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 35.4412	Other (At-Grade) Multilane (2 Lane, unspecified)	2000	ICD estimated from Google Maps linework.
Woodbridge, VA Prince William Co. United States	Belmont Bay Dr. / Course View Way (38.65403, -77.23640)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 25.1826	Other (At-Grade) Single-Lane	2000	ICD estimated from Google Maps linework.
Gaithersburg, MD Montgomery Co. United States	Kentlands Blvd. / Market St. (39.12309, -77.23489)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 41.1480	Other (At-Grade) Multilane (2 Lane, 2x1 max)	1994	Year Completed estimated (1993-2002).
Travilah, MD Montgomery Co. United States	Marwood Hill Dr. / Rivers Bend Ln. (39.03022, -77.23432)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Gettysburg, PA Adams Co. United States	Lincoln Square (Chamberburg St. / York St. / Carlisle St. / Baltimore St.) (39.83092, -77.23112)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 31.1838	Other (At-Grade) Single-Lane		Diagonal parking around circulatory roadway; pedestrian access to center island; no splitter islands. ICD estimated from Google Maps linework.
Gaithersburg, MD Montgomery Co. United States	Winter Walk Dr. / Highland Ridge Ave. (39.12807, -77.22692)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 34.2800	Other (At-Grade) Single-Lane	1998	Year Completed estimated (1993-2002). Was cul-de-sac prior to addition of two more legs. ICD estimated from Google Maps linework.
Gaithersburg, MD Montgomery Co. United States	Orchard Ridge Dr. / Mill Green Ave. (39.12559, -77.22635)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 37.9872	Other (At-Grade) Multilane (2 Lane, unspecified)	2002	ICD estimated from Google Maps linework.
Gaithersburg, MD Montgomery Co. United States	Parkview Ave. / Uptown St. (39.15334, -77.22619)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2012	Right-turn-only lane on northwest leg. Year Completed estimated (2011-2012).
Germantown, MD Montgomery Co. United States	Germantown Rd. / Watkins Mill Rd. / Blunt Rd. (39.19058, -77.22492)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	1999	Right-turn bypass lane on north leg. Year Completed estimated (1993-2005).
Gaithersburg, MD Montgomery Co. United States	Upshire Circle (39.11353, -77.22397)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Potomac, MD Montgomery Co. United States	Brickyard Rd. / Brent Rd. (38.99900, -77.22362)	Traffic Calming Circle Existing	One-Way/Two-Way Stop Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Potomac, MD Montgomery Co. United States	10600 Morning Field Dr. / Sunny Brooke Ln. / Sunny Brooke Pl. (39.07423, -77.21561)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Potomac, MD Montgomery Co. United States	Brickyard Rd. / Hackamore Dr. (38.98567, -77.21274)	Traffic Calming Circle Existing	One-Way/Two-Way Stop Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Potomac, MD Montgomery Co. United States	Brickyard Rd. / Horseshoe Ln. (38.99291, -77.21195)	Traffic Calming Circle Existing	One-Way/Two-Way Stop Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Gaithersburg, MD Montgomery Co. United States	Perry Pkwy. / (parking) (39.14899, -77.21048)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 47.2440	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2004	Year Completed estimated (2002-2005).
Rockville, MD Montgomery Co. United States	Valley Dr. / Aqua Ln. (39.07945, -77.20575)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Gaithersburg, MD Montgomery Co. United States	Washingtonian Blvd. / Washington Blvd. (39.11773, -77.20314)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 36.5760	Other (At-Grade) Multilane (2 Lane, unspecified)	1998	Year Completed estimated (1993-2002).
Gaithersburg, MD Montgomery Co. United States	Washingtonian Blvd. / Rio Blvd. (39.11678, -77.20122)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Multilane (2 Lane, unspecified)	1998	Year Completed estimated (1993-2002).
North Potomac, MD Montgomery Co. United States	Bald Cypress Dr. / Willow Tree Dr. / Cherrydale Dr. (39.08158, -77.20120)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Annandale, VA Fairfax Co. United States	Ravensworth Rd. / Jayhawk St. / Fountain Head Dr. (38.82630, -77.19993)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 22.8600	Other (At-Grade) Single-lane w/ Traversable Central Island	2018	Modular, rapid-install roundabout.
Potomac, MD Montgomery Co. United States	Broad Green Dr. / Clagett Farm Dr. (39.04566, -77.19669)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Carlisle, PA Cumberland Co. United States	N College St. / B St. (40.20962, -77.19535)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2022	https://www.youtube.com/watch?v=KwvSjWacVwI
Carlisle, PA Cumberland Co. United States	B St. / Fairground Ave. (40.20914, -77.18946)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2022	https://www.facebook.com/carlislepa/videos/b-street-and-fairground-avenue-roundabout/587170292764586/
Gaithersburg, MD Montgomery Co. United States	Victory Farm Dr. / Girard St. (39.14648, -77.18493)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 25.9348	Other (At-Grade) Multilane (2 Lane, unspecified)	2006	Year Completed estimated (2005-2006). ICD estimated from Google Maps linework.
Picton, ON Prince Edward Canada	Loyalist Pkwy. / Sandy Hook Rd. (43.99449, -77.17838)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 40.3828	Other (At-Grade) Single-Lane	2009	This was the first highway roundabout in Ontario. Constructed in 2009. https://www.auto123.com/en/news/ontarios-first-roundabout-intersection-opens-near-picton/5652/ ICD estimated from Google Maps linework.
King Farm, MD Montgomery Co. United States	Pleasant Circle (39.11623, -77.17518)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown		Pedestrian access to central island.
Potomac, MD Montgomery Co. United States	Larkmeade Ln. / Bells Ridge Dr. (39.03483, -77.16775)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Rockville, MD Montgomery Co. United States	Henderson Circle (39.08800, -77.16702)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Pedestrian access to central island.
Shermans Dale, PA Perry Co. United States	SR 34-SR 850 (Spring Rd.) / SR 34 (Spring Rd.) / SR 850 (Valley Rd.) / Pisgah State Rd. (40.31955, -77.16513)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 33.5280	Other (At-Grade) Single-Lane	2021
Redland, MD Montgomery Co. United States	Columbus Ave. / Gramercy Blvd. (39.12362, -77.16494)	Other Existing	All-Way Stop Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Potomac, MD Montgomery Co. United States	Old Seven Locks Rd. / Quarry Manor Terrace (38.99371, -77.16028)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Taneytown, MD Carroll Co. United States	MD 140 / MD 832 / Antrim Blvd. (39.64809, -77.15468)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 44.1960	Other (At-Grade) Single-Lane	1996	Completed August 1996. Curbs set for double lane, striped for single outer circulating lane.
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).
Potomac Heights, MD Charles Co. United States	Cedar Ln. / Glymont Rd. / Greenwood Pl. (38.60764, -77.14063)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Callao, Constitutional Province of Callao Constitutional Province of Callao Peru	Plaza Garabaldi (-12.05221, -77.13904)	Other Existing	Unknown Unknown	5 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Callao, Callao Callao Peru	Calle Comandante Juan Fanning [Avenida República de Argentina / Avenida República de Panamá / Avenida Contralmirante Mora] (-12.05156, -77.13409)	Other Existing	Uncontrolled None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (3+ Lane)
Callao, Constitutional Province of Callao Constitutional Province of Callao Peru	Plaza Guardia Chalaca (-12.06804, -77.13347)	Other Existing	Unknown Unknown	7 Approaches 0 Driveways	Other (At-Grade) Unknown
(unincorporated), PA Perry Co. United States	SR 34 / Sunnyside Dr. / Mountain Rd. (40.29453, -77.13262)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 43.7256	Other (At-Grade) Single-Lane	2014	Designed to be expanded to two-lane roundabout. ICD estimated from Google Maps linework.
Gaithersburg, MD Montgomery Co. United States	Hoover Farm Dr. / Holland Meadow Ln. (39.18129, -77.13125)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Gaithersburg, MD Montgomery Co. United States	Hoover Farm Dr. / Brass Bucket Ct. (39.17775, -77.13018)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Callao, Constitutional Province of Callao Constitutional Province of Callao Peru	Ovalo Centenario (-12.05075, -77.12598)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways	Other (At-Grade) Unknown
Rose Hill, VA Fairfax Co. United States	Park Terrace / Edgewood Dr. (38.78241, -77.12587)	Other Existing	Unknown Unknown	4 Approaches 4 Driveways 0.0000	Other (At-Grade) Single-Lane
Callao, Constitutional Province of Callao Constitutional Province of Callao Peru	Ovalo Cantolao (-11.99706, -77.12553)	Other Existing	Unknown Unknown	4 Approaches 1 Driveways	Other (At-Grade) Multilane (3+ Lane)		Pedestrian access to central island.
New Bern, NC Craven Co. United States	W New Bern Pkwy. / Clock Dr. (35.12991, -77.12486)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown		No splitter islands on side street.
Derwood, MD Montgomery Co. United States	Coppelia Dr. / Toboggan Ln. (39.13566, -77.11938)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
La Perla, Constitutional Province of Callao Constitutional Province of Callao Peru	Republic of Venezuela Ave. / Avenida La Marina Ramps (-12.06525, -77.11925)	Unknown Existing	Unknown Unknown	6 Approaches 0 Driveways	Freeway Ramps (Grade-Separated) Multilane (3+ Lane)
Bethesda, MD Montgomery Co. United States	Bradmoor Dr. / Roosevelt St. (38.99427, -77.11925)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 21.3360	Other (At-Grade) Single-Lane	2017	Year Completed estimated (2016-2018).
Alexandria, VA Alexandria City United States	Cameron Station Blvd. / Brenman Park Dr. (38.80933, -77.11861)	Other Existing	All-Way Stop Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (2 Lane, 2x2 max)		Pedestrian access to central island.
Quinton, VA New Kent Co. United States	SR 249 (New Kent Hwy.) / SR 612 (Tunstall Rd.-Airport Rd.) (37.53278, -77.11546)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 32.2017	Other (At-Grade) Single-Lane	2017	ICD estimated from Google Maps linework.
Derwood, MD Montgomery Co. United States	Achille Ln. / Heartwood Dr. (39.12925, -77.11543)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Corning, NY Steuben Co. United States	Robert Dann Blvd. / Aurene Dr. / Creekside Dr. (42.16506, -77.11484)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 40.7216	Other (At-Grade) Multilane (2 Lane, unspecified)	2003	Access permits for research and development plant. ICD estimated from Google Maps linework.
Derwood, MD Montgomery Co. United States	Heartwood Dr. (39.13239, -77.11434)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Erwin, NY Steuben Co. United States	Robert Dann Dr. / Science Center Rd. (42.15936, -77.11082)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 53.3400	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2001	Add-lane right-turn bypass lane on west leg.
Bethesda, MD Montgomery Co. United States	Tournay Rd. / Spangler Ave. (38.94811, -77.11053)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Bethesda, MD Montgomery Co. United States	Boxwood Rd. / Spangler Ave. (38.94781, -77.10888)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
New Bern, NC Craven Co. United States	Elizabeth Ave. (35.12585, -77.10821)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Washington, DC United States	Westmoreland Circle (Massachusetts Ave. NW / Dalecarlia Dr. / Western Ave. NW / Butterworth Pl. NW) (38.94892, -77.10097)	Rotary Existing	All-Way Yield None	6 Approaches 0 Driveways 100.5840	Other (At-Grade) Multilane (3+ Lane)		On boundary of DC and Maryland (Western Ave. is the boundary).
Olney, MD Montgomery Co. United States	Wickham Rd. / Olney Mill Rd. / Dunsford Dr. (39.16071, -77.09596)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands on three legs.
Arlington, VA Arlington Co. United States	Key Blvd. / N Fillmore St. (38.89146, -77.09415)	Traffic Calming Circle Existing	One-Way/Two-Way Stop Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Olney, MD Montgomery Co. United States	Wickham Rd. / Broom Dr. (39.15708, -77.09362)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Arlington, VA Arlington Co. United States	Key Blvd. / N Danville St. (38.89224, -77.09208)	Traffic Calming Circle Existing	All-Way Stop Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Olney, MD Montgomery Co. United States	Brightwood Rd. / Winding Oak Dr. / Weston Pl. (39.16065, -77.09120)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Arlington, VA Arlington Co. United States	Key Blvd. / N Cleveland St. (38.89253, -77.09099)	Traffic Calming Circle Existing	One-Way/Two-Way Stop Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Arlington, VA Arlington Co. United States	N Danville St. / Franklin Rd. / N Bryan St. (38.89067, -77.09073)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Parking in circulatory roadway.