Roundabouts Database

29616 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
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.
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
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
Elkridge, MD
Howard Co.
United States 		Toomey Ln. / Clements Ln.
(39.20950, -76.71291) 		Other
Existing 		Unknown
Unknown 		2 Approaches
4 Driveways
0.0000 		Other (At-Grade)
Unknown 		No splitter islands.
Odenton, MD
Anne Arundel Co.
United States 		Meyers Station Rd. / Conway Rd.
(39.02871, -76.71317) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
47.2440 		Other (At-Grade)
Single-Lane 		2016 Year Completed estimated (2015-2017).
Bowie, MD
Prince George's Co.
United States 		Melford Blvd. / Science Dr.
(38.96089, -76.71320) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
43.6480 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2008 Concentric striping in circulatory roadway. 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
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.
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.
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.
Seven Valleys, PA
York Co.
United States 		Grand Lake Dr. / Grand Oak Way
(39.86507, -76.71601) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown
Seven Valleys, PA
York Co.
United States 		Countryside Rd. / Morningside Way
(39.86287, -76.71666) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown
Harrisburg, PA
Dauphin Co.
United States 		Baumgardner Dr. / Hanoverdale Dr. / Brynfield Way / Quiggly Cir.
(40.32675, -76.71677) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
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
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).
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.
Odenton, MD
Anne Arundel Co.
United States 		Two Rivers Blvd. / Dragon Fly Way / Broad Wing Dr.
(39.01870, -76.71985) 		Unknown
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
30.4800 		Other (At-Grade)
Single-Lane 		2015
Linglestown, PA
Dauphin Co.
United States 		Aynlee Way / Willage Way
(40.32784, -76.72308) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		Parking along circulatory roadway.
Elkridge, MD
Howard Co.
United States 		Elkridge Crossing Way / Doctor Patel Dr.
(39.21091, -76.72512) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
31.4634 		Other (At-Grade)
Single-Lane 		2007 East leg stubbed for future. ICD estimated from Google Maps linework.
Hanover, MD
Anne Arundel Co.
United States 		Watts Ave. / Clark Rd.
(39.15138, -76.72638) 		Roundabout
Existing 		All-Way Yield
None 		2 Approaches
0 Driveways
25.9330 		Other (At-Grade)
Single-Lane 		2008 ICD estimated from Google Maps linework.
Clements, MD
St. Mary's Co.
United States 		MD 242 (Colton Point Rd.) / MD 234 (Budds Creek Rd.)
(38.32656, -76.72755) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
31.8559 		Other (At-Grade)
Single-Lane 		2017 https://www.somdnews.com/enterprise/spotlight/clements-roundabout-intersection-open-with-improvements-for-tractors/article_05f0355a-245a-5018-b4e6-79b0c5866ed8.html ICD estimated from Google Maps linework.
Odenton, MD
Anne Arundel Co.
United States 		Sand Lens Dr. / Water Strider Way
(39.02435, -76.72793) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2020
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
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
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.
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 		Governors Park Ln. / Chancelsors Dr.
(38.83526, -76.73311) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown
Davidsonville, MD
Prince George's Co.
United States 		Town Center Blvd. / Emerald Way
(38.94399, -76.73410) 		Other
Existing 		Uncontrolled
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		Inside shopping center. No splitter islands on east and west legs.
Upper Marlboro, MD
Prince George's Co.
United States 		Presidential Golf Dr. / Pentland Hills Dr.
(38.84025, -76.73519) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown
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 		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 		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.
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.
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 		Nancy Gibbons Terrace
(38.85592, -76.74356) 		Other
Existing 		Unknown
Unknown 		2 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Davidsonville, MD
Prince George's Co.
United States 		Health Center Dr. / (parking)
(38.94925, -76.74452) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Hanover, MD
Anne Arundel Co.
United States 		Arundel Mills Blvd. / MD 295 NB Ramps
(39.15573, -76.74459) 		Roundabout
Removed 		All-Way Yield
None 		3 Approaches
0 Driveways
26.8575 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2002 ICD estimated from Google Maps linework. Replaced with DDI
Hanover, MD
Anne Arundel Co.
United States 		Arundel Mills Blvd. / MD 295 SB Ramps
(39.15677, -76.74617) 		Roundabout
Removed 		All-Way Yield
None 		2 Approaches
0 Driveways
66.6796 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2002 ICD estimated from Google Maps linework. Replaced with DDI.
Severn, MD
Anne Arundel Co.
United States 		Milestone Pkwy. / Split Creek Ln. / (parking)
(39.15042, -76.74668) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
45.7200 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2007
Severn, MD
Anne Arundel Co.
United States 		Milestone Pkwy. / Clubhouse Dr.
(39.14600, -76.74775) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
45.7200 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2012 Year Completed estimated (2011-2014).
Harrisburg, PA
Dauphin Co.
United States 		Country View Dr.
(40.35270, -76.74997) 		Other
Existing 		Unknown
Unknown 		2 Approaches
6 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Windsor Mill, MD
Baltimore Co.
United States 		Lord Baltimore Dr. / Wildlife Dr.
(39.31993, -76.75019) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
14.7833 		Other (At-Grade)
Single-Lane 		1998 Year Completed estimated (1993-2002). ICD estimated from Google Maps linework.
Lower Paxton, PA
Dauphin Co.
United States 		Royal Terrace Dr. / View Crest Dr. / Rock Ridge Ave.
(40.35463, -76.75035) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands on northwest, northeast, or southeast legs.
Severn, MD
Anne Arundel Co.
United States 		Milestone Pkwy. / (unknown)
(39.14341, -76.75076) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
45.7200 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2012 Year Completed estimated (2011-2014).
Williamsburg, VA
James City Co.
United States 		Longhill Rd. / Williamsburg Plantation Dr.
(37.30395, -76.75083) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
45.7200 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2021
Hanover, MD
Anne Arundel Co.
United States 		Parkside Blvd. / Fredericksburg Rd. / Cornfield Ave.
(39.13140, -76.75125) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2015
Windsor Mill, MD
Baltimore Co.
United States 		Lord Baltimore Dr. / Glen Spring Rd. / Kettle Ct.
(39.31750, -76.75152) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
17.5558 		Other (At-Grade)
Single-Lane 		1998 Year Completed estimated (1993-2002). 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
Linglestown, PA
Dauphin Co.
United States 		Buckley Dr. / Bradford Blvd.
(40.32760, -76.75391) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Jessup, MD
Anne Arundel Co.
United States 		MD 198 (Laurel Fort Meade Rd.) / MD 32 WB Ramps
(39.09178, -76.75688) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
53.3400 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2002 Lanes reduced in 2010. 21442
Jessup, MD
Anne Arundel Co.
United States 		MD 198 (Laurel Fort Meade Rd.) / MD 32 EB Ramps
(39.08997, -76.75736) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
53.3400 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2002 Lanes reduced in 2010. 21442
Jessup, MD
Anne Arundel Co.
United States 		Montevideo Rd. / Forest Ave. / Wigley Ave.
(39.15966, -76.75916) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
33.5280 		Other (At-Grade)
Single-Lane 		2007 Year Completed estimated (2006-2007).
Jessup, MD
Anne Arundel Co.
United States 		National Business Pkwy. / Brock Bridge Rd.
(39.14025, -76.76395) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
44.4636 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2013 ICD estimated from Google Maps linework.
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.
Catonsville, MD
Baltimore Co.
United States 		Edmundson Avenue / Old Frederick Road
(39.27533, -76.76612) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
20.3400 		Other (At-Grade)
Single-Lane 		2010 ICD estimated from Google Maps linework.
Jessup, MD
Howard Co.
United States 		Canine Rd. / MD 32 EB Ramps
(39.10101, -76.76953) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
38.0005 		Freeway Ramps (Grade-Separated)
Single-Lane 		2001 ICD estimated from Google Maps linework.
Williamsburg, VA
James City Co.
United States 		Colonial Heritage Blvd. / Harrington Commons / Chapel Xing
(37.34606, -76.77094) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
74.0590 		Other (At-Grade)
Single-Lane 		2005 ICD estimated from Google Maps linework.
Odessa, ON
Lennox and Addington
Canada 		CR 2 / CR 4
(44.26179, -76.77489) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
38.4898 		Other (At-Grade)
Single-Lane 		2009 ICD estimated from Google Maps linework.
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
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)
Willamsburg, VA
James City Co.
United States 		Saunders Bridge / S Square / River Moor / Poggio Field
(37.25970, -76.77789) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
33.2698 		Other (At-Grade)
Single-Lane 		2007 No splitter islands. Uncertain traffic control. ICD estimated from Google Maps linework.
Hughesville, MD
Charles Co.
United States 		MD 231 / MD 5 NB Ramps
(38.53426, -76.77790) 		Roundabout
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
54.1863 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2005 ICD estimated from Google Maps linework.
Hughesville, MD
Charles Co.
United States 		MD 231 / MD 5 SB Ramps
(38.53381, -76.77969) 		Roundabout
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
58.8579 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2005 ICD estimated from Google Maps linework.
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).
Oak Grove, MD
Prince Georges Co.
United States 		MD 193 (Watkins Park Dr.) / Oak Grove Rd.
(38.87737, -76.78108) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
38.1207 		Other (At-Grade)
Single-Lane 		2001 ICD estimated from Google Maps linework.
Chaptico, MD
St. Marys Co.
United States 		MD 234 / MD 238
(38.36791, -76.78179) 		Roundabout
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
35.5833 		Other (At-Grade)
Single-Lane 		2007 ICD estimated from Google Maps linework.
Ellicott City, MD
Howard Co.
United States 		MD 103 / MD 100 EB Ramps
(39.20733, -76.78243) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
30.5396 		Freeway Ramps (Grade-Separated)
Single-Lane 		1998 Opened November 1998. ICD estimated from Google Maps linework.
Williamsburg, VA
James City Co.
United States 		Fords Colony Dr. / St. Andrews Dr.
(37.30351, -76.78289) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
66.5009 		Other (At-Grade)
Single-Lane 		2004 ICD estimated from Google Maps linework.
Ellicott City, MD
Howard Co.
United States 		MD 103 / MD 100 WB Ramps
(39.20846, -76.78294) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
33.3154 		Freeway Ramps (Grade-Separated)
Single-Lane 		1998 Opened November 1998. ICD estimated from Google Maps linework.
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.
Annapolis Junction, MD
Anne Arundel Co.
United States 		Guilford Rd. / MD 32 WB Ramps
(39.12294, -76.78472) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
32.4293 		Freeway Ramps (Grade-Separated)
Single-Lane 		2002 Bypass lanes on all legs. ICD estimated from Google Maps linework.
Owings Mills, MD
Baltimore Co.
United States 		Tollgate Rd. / Lastgage Rd.
(39.42149, -76.78482) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
28.6010 		Other (At-Grade)
Single-Lane 		2004 ICD estimated from Google Maps linework.
Owings Mills, MD
Baltimore Co.
United States 		(unknown)
(39.39269, -76.78657) 		Other
Existing 		Unknown
Unknown 		2 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Owings Mills, MD
Baltimore Co.
United States 		Painters Mill Rd. / Lyons Mill Rd.
(39.39425, -76.78747) 		Other
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Multilane (2 Lane, unspecified)
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.
Horseheads, NY
Chemung Co.
United States 		Rte 13 / Old Ithaca Rd. / Breesport Rd.
(42.18851, -76.79076) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
29.2025 		Other (At-Grade)
Single-Lane 		2012 ICD estimated from Google Maps linework.
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.
Lingelstown, PA
Dauphin Co.
United States 		Lingelstown Rd. / N. Mountain Rd.
(40.34341, -76.79206) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
20.9367 		Other (At-Grade)
Single-Lane 		2011 Previously controlled by two-way stop ICD estimated from Google Maps linework.
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
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.
Elmira, NY
Chemung Co.
United States 		Maple Ave. / Horner St.
(42.08282, -76.79445) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
17.7281 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2012 Year completed estimated (2011-2013). ICD estimated from Google Maps linework.
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 		Snowden River Pkwy. / MD 100 WB Ramps
(39.21233, -76.79544) 		Roundabout
Existing 		All-Way Yield
Metering Signal 		3 Approaches
0 Driveways
25.9105 		Freeway Ramps (Grade-Separated)
Single-Lane 		1998 Opened November 1998. Metering signal on Snowden River Pkwy approach. ICD estimated from Google Maps linework.
Elmira, NY
Chemung Co.
United States 		Maple Ave. / Caldwell Ave.
(42.08399, -76.79589) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
8.8639 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2012 Year completed estimated (2011-2013). ICD estimated from Google Maps linework.
Lingelstown, PA
Dauphin Co.
United States 		Lingelstown Rd. / Blue Mountain Pkwy.
(40.34253, -76.79711) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
24.5782 		Other (At-Grade)
Single-Lane 		2011 Previously controlled by two-way stop ICD estimated from Google Maps linework.
Owings Mills, MD
Baltimore Co.
United States 		Ballard Green Dr. / Wilson Shannon Dr. / Julia Ln.
(39.39162, -76.80439) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2017 Year Completed estimated (2017-2018).
Horseheads, NY
Chemung Co.
United States 		Rte 13 / E. Franklin St.
(42.16756, -76.80553) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
32.7531 		Other (At-Grade)
Single-Lane 		2012 ICD estimated from Google Maps linework.
Horseheads, NY
Chemung Co.
United States 		Rte 13 / Horseheads Connector Rd.
(42.17077, -76.80564) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		2023
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
Toano, VA
James City Co.
United States 		Weathers Blvd. / Kenton Ct.
(37.40490, -76.80636) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Owings Mills, MD
Baltimore Co.
United States 		New Town Blvd. / Rangeford Dr.
(39.40957, -76.80654) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Long Reach, MD
Howard Co.
United States 		Shining Oceans Way / Dried Earth Blvd.
(39.18977, -76.80673) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
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
Elmira, NY
Chemung Co.
United States 		N Main St. / Park Pl. / W 3rd St.
(42.09278, -76.80993) 		Roundabout
Existing 		All-Way Yield
None 		5 Approaches
0 Driveways
33.6780 		Other (At-Grade)
Single-Lane 		2019 https://www.mytwintiers.com/local-news-3/elmira-cultural-connectors-ribbon-cutting-took-place-and-the-roundabout-is-officially-open/ ICD estimated from Google Maps linework.
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.
Columbia, MD
Howard Co.
United States 		Golden Straw Ln. / Long Meadow Ct.
(39.21441, -76.81085) 		Traffic Calming Circle
Existing 		Other
None 		3 Approaches
0 Driveways
99.0123 		Other (At-Grade)
Single-Lane 		2000 Yield control only on west leg. ICD estimated from Google Maps linework.
Ellicott City, MD
Howard Co.
United States 		Rogers Ave / Old Frederick Road
(39.29904, -76.81308) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
1 Driveways
26.8026 		Other (At-Grade)
Single-Lane 		2004 ICD estimated from Google Maps linework. Old Frederick Road is MD 985A but roundabout may be locally maintained and not state maintained
Reisterstown, MD
Baltimore Co.
United States 		Winged Foot Dr. / Crystal Downs Ct. / Kauri Cliffs Rd.
(39.42897, -76.81445) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Villages of Winterset, MD
Baltimore Co.
United States 		Runnymeade Rd. / New Town Blvd. / Bon Haven Ln.
(39.39893, -76.81700) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Horseheads, NY
Chemung Co.
United States 		Old Ithaca Rd. / Horseheads Connector Rd. / E St.
(42.17554, -76.81741) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		2023