Roundabouts Database Index

29465 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
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	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).
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.
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.
Bel Air, MD Harford Co. United States	Thomas Run Rd. / Cross Campus Dr. (39.56164, -76.28699)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2012
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).
Brandywine, MD Prince George's Co. United States	MD 373 / Accokeek Rd. / MD 5 (Branch Ave.) SB On-Ramp (38.70076, -76.87599)	Roundabout Existing	All-Way Yield None	2 Approaches 0 Driveways 39.6240	Freeway Ramps (Grade-Separated) Single-Lane	2019	MD 5 (Branch Ave.) was converted to limited access. https://www.thebaynet.com/articles/0419/newtrafficshiftstartsinbrandywineareathursday.html.
Accokeek, MD Prince George's Co. United States	St Mary's View Rd. / Lusby Ridge Rd. (38.69721, -76.95157)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 27.4320	Other (At-Grade) Single-Lane		No splitter island on south leg.
Saint Charles, MD Charles Co. United States	Lexington Dr. / Montpelier Dr. (38.64225, -76.96877)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Upper Marlboro, MD Prince George's Co. United States	George Hilleary Terrace (38.84772, -76.74269)	Other Existing	Unknown Unknown	2 Approaches 2 Driveways 0.0000	Other (At-Grade) Single-Lane
Upper Marlboro, MD Prince George's Co. United States	Symondsbury Way / Galeshead Dr. (38.85587, -76.73628)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Upper Marlboro, MD Prince George's Co. United States	Nancy Gibbons Terrace (38.85592, -76.74356)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Davidsonville Historic District, MD Prince George's Co. United States	Science Dr. / Curie Dr. (38.96399, -76.70897)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Davidsonville Historic District, MD Prince George's Co. United States	Science Dr. / (parking) (38.96068, -76.71428)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Westminster, MD Carroll Co. United States	(Carroll Community College entrance) / (parking) (39.53096, -76.99236)	Other Existing	One-Way/Two-Way Stop Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
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
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
Westminster, MD Carroll Co. United States	Old Westminster Pike / N Chandler Dr. (39.55808, -76.97130)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 33.5280	Other (At-Grade) Single-Lane	2018	Year Completed estimated (2017-2018).
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.
Solomons, MD Calvert Co. United States	Farren Ave. / Charles St. (38.31939, -76.45267)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 21.3360	Other (At-Grade) Single-lane w/ Traversable Central Island	2008	Painted splitter islands. Year Completed estimated (2007-2009).
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.
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.
(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).
Germantown, MD Montgomery Co. United States	Crossview Rd. / Autumn Crest Rd. (39.16717, -77.30075)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Germantown, MD Montgomery Co. United States	Crestmount Rd. / Kings Crossing Rd. (39.16175, -77.30841)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Germantown, MD Montgomery Co. United States	Kings Crossing Blvd. / Cornflower Rd. (39.16222, -77.30397)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Germantown, MD Montgomery Co. United States	Kings Crossing Blvd. / Ashmeade Rd. (39.16235, -77.29971)	Other Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 32.0040	Other (At-Grade) Single-Lane		Painted splitter islands. Pedestrian crossings next to circulatory roadway.
Germantown, MD Montgomery Co. United States	Ashleigh Greene Rd. / Ashmeade Rd. (39.16013, -77.29900)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Germantown, MD Montgomery Co. United States	Ashleigh Greene Rd. / Cornflower Rd. (39.15879, -77.30324)	Other Existing	Unknown Unknown	4 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.
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.
Upper Marlboro, MD Prince George's Co. United States	Central Park Dr. / Rock Spring Dr. (38.83296, -76.84354)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 50.2920	Other (At-Grade) Multilane (2 Lane, unspecified)	2016
Upper Marlboro, MD Prince George's Co. United States	Rock Spring Dr. / (unknown) (38.83762, -76.84567)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 51.8160	Other (At-Grade) Multilane (2 Lane, unspecified)	2018	Year Completed estimated (2018-2019).
Upper Marlboro, MD Prince George's Co. United States	Woodyard Rd. / Observatory Pl. (38.82198, -76.83374)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Parking along circulatory roadway.
Upper Marlboro, MD Prince George's Co. United States	Beech Tree Pkwy. / Moores Plains Blvd. / (parking) (38.84933, -76.73622)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Upper Marlboro, MD Prince George's Co. United States	Moores Plains Blvd. / Humberside Way (38.85198, -76.73522)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Upper Marlboro, MD Prince George's Co. United States	Moores Plains Blvd. / Copper Beach Dr. (38.85458, -76.73266)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Upper Marlboro, MD Prince George's Co. United States	Moores Plains Blvd. / Bishopstone Terrace (38.85575, -76.73096)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Upper Marlboro, MD Prince George's Co. United States	Moores Plains Blvd. / Buxton Pl. (38.85826, -76.73014)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Davidsonville Historic District, MD Prince George's Co. United States	Cameron Grove Blvd. / New Acadia Ln. (38.89933, -76.77575)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Lake Arbor, MD Prince George's Co. United States	Lake Arbor Way / Congressional Ct. (38.90201, -76.80962)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Lake Arbor, MD Prince George's Co. United States	Lake Arbor Way / Golf Course Dr. (38.90618, -76.81975)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Lake Arbor, MD Prince George's Co. United States	Lake Arbor Way / Fairlakes Pl (38.90717, -76.82304)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Owings Mills, MD Baltimore Co. United States	Grand Central Ave. / (parking) (39.40581, -76.78033)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 48.7680	Other (At-Grade) Multilane (2 Lane, unspecified)	2014	Year Completed estimated (2011-2014).
Owings Mills, MD Baltimore Co. United States	Grand Central Ave. / Waverly Ln. (39.40713, -76.78413)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2014	Year Completed estimated (2011-2014). West leg added 2015.
Owings Mills, MD Baltimore Co. United States	Upper Mill Dr. / Bluestem Ct. /Spring Willow Ct. / Bayline Cir. (39.41253, -76.82032)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Silver Spring, MD Montgomery Co. United States	Woodmoor Dr. / Lexington Dr. (39.02215, -77.00818)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Prince Frederick, MD Calvert Co. United States	MD 402 Dares Beach Rd. / Armory Rd. (38.54877, -76.58590)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2014
Prince Frederick, MD Calvert Co. United States	Silverwood Ln. / English Oak Ln. / Running Brook Way (38.54713, -76.58000)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 27.4320	Other (At-Grade) Single-Lane	2007
Huntingtown, MD Calvert Co. United States	Queensberry Dr. / Larkspur Ct. (38.58450, -76.55968)	Other Existing	Unknown Unknown	3 Approaches 4 Driveways 0.0000	Other (At-Grade) Single-Lane
Chesapeake Beach, MD Calvert Co. United States	Harrison Blvd. / Sansbury Dr. (38.69561, -76.55797)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 24.3840	Other (At-Grade) Single-Lane	1997	Year Completed estimated (1993-2004).
Owings, MD Calvert Co. United States	Cross Point Dr. / Paulyn Dr. (38.71532, -76.61335)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Owings, MD Calvert Co. United States	Cross Point Dr. / Blue Sky Ct. / Bear Claw Ct. (38.71468, -76.61554)	Other Existing	Unknown Unknown	3 Approaches 4 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Owings, MD Calvert Co. United States	Good Shepherd Way / Megatha Ln. (38.71846, -76.62480)	Other Existing	Uncontrolled Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Elkridge, MD Howard Co. United States	Toomey Ln. / Fairlee Rd. (39.21083, -76.71160)	Roundabout Existing	All-Way Yield None	3 Approaches 2 Driveways 27.4320	Other (At-Grade) Single-Lane	2002
Prince Frederick, MD Calvert Co. United States	Skipjack Rd. / Ketch Rd. (38.51100, -76.64140)	Unknown Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (2 Lane, unspecified)
Huntingtown, MD Calvert Co. United States	Huntsman Dr. / Horse Pen Run / Hardesty Rd. (38.57357, -76.54875)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Huntingtown, MD Calvert Co. United States	Queensberry Dr. / Carlon Ct. / Duchess Ln. / (unknown) (38.58381, -76.55492)	Other Existing	All-Way Yield Unknown	5 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Huntingtown, MD Calvert Co. United States	Mairfield Ln. / Liberty Ln. / Fairwood Dr. (38.60411, -76.58464)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 42.6720	Other (At-Grade) Single-Lane	2014	Painted splitter islands added 2017.
Huntingtown, MD Calvert Co. United States	Marley Run / Channel Ct. / Plainview Dr. (38.60911, -76.59709)	Other Existing	Uncontrolled Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Huntingtown, MD Calvert Co. United States	Barberry Dr. / Spears Rd. / Blueberry Ct. (38.62290, -76.59347)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Pedestrian access to central island.
Odenton, MD Anne Arundel Co. United States	Piney Orchard Pkwy. / Roaming Ridge Way / Village Center Dr. (39.06702, -76.71951)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 50.2920	Other (At-Grade) Multilane (2 Lane, unspecified)	2003	Year Completed estimated (2002-2004).
Laurel, MD Howard Co. United States	Weathered Stone Way / Boulder Ridge Rd. / Stone Lake Dr. (39.13774, -76.84066)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Laurel, MD Howard Co. United States	Boulder Ridge Rd. / Polished Pebble Way (39.13864, -76.84358)	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	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
Columbia, MD Howard Co. United States	Stevens Forest Rd. / Farewell Rd. / Night Street Hill (39.20114, -76.84781)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 27.4320	Other (At-Grade) Single-lane w/ Traversable Central Island	2019
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.
Olney, MD Montgomery Co. United States	Martins Dairy Cir. / Gooseneck Terrace (39.13176, -77.07439)	Other Existing	Unknown Unknown	3 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
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. / 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. / Royal Crown Dr. (39.20518, -77.25877)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
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
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
Camp Springs, MD Prince George's Co. United States	Telfair Blvd. / Midtown Square (38.82920, -76.90940)	Other Existing	Uncontrolled Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Savage, MD Howard Co. United States	Washington St. / Foundry St. (39.13656, -76.82513)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 18.2880	Other (At-Grade) Single-lane w/ Traversable Central Island	2021	Painted splitter islands. Pedestrian crossing on west leg adjacent to circulatory roadway. https://www.howardcountymd.gov/News120121
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).
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.
College Park, MD Prince George's Co. United States	Dupont Circle (38.95971, -76.93792)	Other Existing	Other Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Mix of stop and yield control. No splitter islands.
Davidsonville, MD Prince George's Co. United States	Marleigh Dr. / Huntchase Dr. (38.95209, -76.79398)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown		No splitter islands.
Linganore, MD Frederick Co. United States	Lake Linganore Blvd. / Eaglehead Dr. (39.39732, -77.31047)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 1 Driveways 0.0000	Other (At-Grade) Single-Lane	2019	Year Completed estimated (2018-2022).
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.
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
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.
Olney, MD Montgomery Co. United States	Martins Dairy Cir. / Old Baltimore Rd. (39.13345, -77.07382)	Other Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Painted splitter islands.
Wheaton, MD Montgomery Co. United States	Park Vista Dr. / Wintergate Dr. / Longmeade Crossing Dr. (39.10755, -77.05340)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2020	Painted splitter islands added 2020.
Ashton, MD Montgomery Co. United States	Harbour Town Dr. / Grand Cypress Ct. (39.13205, -77.00407)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Annapolis, MD Anne Arundel Co. United States	State Circle (38.97890, -76.49063)	Other Existing	Unknown Unknown	6 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Maryland State House in central island.
Londontowne, MD Anne Arundel Co. United States	Millhaven Dr. / Two Rivers Dr. / Tilden Way (38.93715, -76.56159)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 33.5280	Other (At-Grade) Single-Lane	2006	Converted from open intersection. Year Completed estimated (2005-2006).
Londontowne, MD Anne Arundel Co. United States	Southdown Rd. / Landing Rd. / Decker Pl. (38.93983, -76.57211)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Davidsonville Historic District, MD Prince George's Co. United States	Oak Grove Rd. / (parking) (38.87858, -76.77717)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (2 Lane, 2x1 max)
Upper Marlboro, MD Prince George's Co. United States	Thomas Sim Lee Terrace / Mary Digges Pl. (38.81663, -76.81748)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Saint Charles, MD Charles Co. United States	Radford St. / Montpelier Dr. (38.64135, -76.97106)	Other Existing	Unknown Unknown	3 Approaches 4 Driveways 0.0000	Other (At-Grade) Single-Lane		Pedestrian access to central island.
Saint Charles, MD Charles Co. United States	Ethridge Dr. / Nobility Ct. (38.62769, -76.96461)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter island on north and east legs.
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
Urbana, MD Frederick Co. United States	Stone Barn Dr. / Longleaf Dr. (39.33278, -77.36713)	Unknown Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
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).
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
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.