Roundabouts Database

29465 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.


Search Advanced Search Export as KML
City, State
County
Country 		Intersection
(Lat, Lng) 		Type
Status 		Control Type / Other Control Type Approaches / Driveways / ICD (m) Functional Class /
LaneType 		Year Completed Comments
Camp Lejeune, NC
Onslow Co.
United States 		Daly St. / Anderson St. / HM Smith Blvd.
(34.65231, -77.32713) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
46.1764 		Other (At-Grade)
Single-Lane 		ICD = 125 ft. ICD estimated from Google Maps linework.
Nassau, New Providence
Nassau
The Bahamas 		Wulff Rd. / Marathon Rd. / Jerome Ave.
(25.05794, -77.32413) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
24.8841 		Other (At-Grade)
Unknown 		ICD estimated from Google Maps linework.
Paradise Island, New Providence
Nassau
The Bahamas 		Paradise Beach Dr. / Harbour Dr.
(25.08108, -77.31985) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
37.8600 		Other (At-Grade)
Single-Lane 		ICD estimated from Google Maps linework.
Triangle, VA
Prince William Co.
United States 		Stonewall Manor Dr. / Kerill Rd.
(38.54970, -77.31860) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
27.0873 		Other (At-Grade)
Single-Lane 		2005 Functional Class: Local ICD estimated from Google Maps linework.
Farmington, NY
Ontario Co.
United States 		CR 8 / CR 41
(42.96351, -77.31853) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		2015
Mechanicsville, VA
Hanover Co.
United States 		Cold Harbor Rd. / Creighton Rd.
(37.59043, -77.31734) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		2020 https://richmond.com/news/local/hanover/mechanicsville-local/creighton-road-roundabout-progresses/article_193eda3e-d0f5-11ea-b1cf-df759d81b577.html
Dumfries, VA
Prince William Co.
United States 		Stonewall Manor Dr. / Cabin Rd.
(38.55385, -77.31572) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
25.2178 		Other (At-Grade)
Single-Lane 		2004 Year Completed estimated (2003-2005). ICD estimated from Google Maps linework.
Fort Lee, VA
Prince George Co.
United States 		Battle Circle
(37.23236, -77.31545) 		Other
Existing 		Unknown
Unknown 		5 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown 		No splitter islands.
Triangle, VA
Prince William Co.
United States 		Potomac Crest Dr. / Lady Catherine Cir.
(38.53672, -77.31500) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
28.9607 		Other (At-Grade)
Single-Lane 		2006 Functional Class: Local ICD estimated from Google Maps linework.
Triangle, VA
Prince William Co.
United States 		Kerill Rd. / Dondis Creek Ct.
(38.54794, -77.31411) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
22.4177 		Other (At-Grade)
Single-Lane 		2010 Functional Class: Local ICD estimated from Google Maps linework.
Fairfax, VA
Fairfax Co.
United States 		Patriot Cir. / Mason Pond Dr.
(38.82981, -77.31152) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
42.6720 		Other (At-Grade)
Single-Lane 		2008
Linganore, MD
Frederick Co.
United States 		Old National Pike / Eaglehead Dr.
(39.38995, -77.31098) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
50.2920 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2008 South leg stubbed. Constructed initially as single-lane roundabout in 2007-2008. Expanded into two-lane roundabout 2016-2018.
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).
Quantico Base, VA
Prince William Co.
United States 		Barnett Ave. / Russell Rd. / Dunlap Rd. / Damato St.
(38.51066, -77.31001) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Multilane (2 Lane, unspecified)
New Market, MD
Frederick Co.
United States 		Eaglehead Dr. / Pecking Stone St.
(39.39397, -77.30943) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
24.3840 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2016 Year Completed estimated (2015-2017).
Hopewell, VA
Hopewell City
United States 		Virginia St. / Wilmington Ave.
(37.27664, -77.30884) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		Fire station in central island.
Prince George, VA
Prince George Co.
United States 		Allin Rd. / A Ave. / Bull Hill Rd. / Jefferson Park Rd.
(37.22679, -77.30860) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
32.3333 		Other (At-Grade)
Single-Lane 		2012 Right-turn-only lane on north leg. ICD estimated from Google Maps linework.
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.
New Market, MD
Frederick Co.
United States 		Eaglehead Dr. / Tomahawk St. / Fallfish Ct.
(39.39677, -77.30826) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
35.0520 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2018 Year Completed estimated (2017-2018).
Ijamsville, MD
Frederick Co.
United States 		Royal Saint Andrews Pl. / Quail Creek Pl.
(39.38039, -77.30788) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown
Greenville, NC
Pitt Co.
United States 		SR 2241 (Ivy Rd.) / SR 1774 (Mills Rd.)
(35.52351, -77.30654) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
39.8535 		Other (At-Grade)
Single-Lane 		2015 Project W-5601N. ICD estimated from Google Maps linework.
Linganore, MD
Frederick Co.
United States 		Boyers Mill Rd. / Eaglehead Dr.
(39.41912, -77.30650) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
33.5280 		Other (At-Grade)
Single-Lane 		2018
Boyds, MD
Montgomery Co.
United States 		Crazy Quilt Ct.
(39.16123, -77.30454) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Fairfax, VA
City of Fairfax
United States 		University Dr. / (parking)
(38.86028, -77.30428) 		Roundabout
Existing 		All-Way Yield
None 		2 Approaches
3 Driveways
27.4320 		Other (At-Grade)
Single-Lane 		2022 https://www.youtube.com/watch?v=UwmJSdActdk
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 		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.
Oakton, VA
Fairfax Co.
United States 		Hunter Mill Rd. / Mystic Meadow Way
(38.88680, -77.30187) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
26.9599 		Other (At-Grade)
Single-Lane 		2018 ICD estimated from Google Maps linework.
Darnestown, MD
Montgomery Co.
United States 		Schaeffer Rd. / Germantown Park Dr. / Central Park Cir.
(39.15003, -77.30152) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
48.7680 		Other (At-Grade)
Single-Lane 		2004 Right-turn-only lane on northeast leg. Year Completed estimated (2002-2005).
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.
Ijamsville, MD
Frederick Co.
United States 		Whiskey Rd. / Whiskey Ct.
(39.36078, -77.30012) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown
Prince George, VA
Prince George Co.
United States 		VA 106 (Courthouse Rd) / VA 634 (Allin Rd)
(37.22338, -77.29979) 		Roundabout
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
38.0409 		Other (At-Grade)
Single-Lane 		2010 ICD estimated from Google Maps linework.
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.
(unincorporated), VA
Henrico Co.
United States 		Darbytown Rd. / Turner Rd.
(37.45112, -77.29935) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2023 Quick build with plastic central island. Peanut shaped. https://www.youtube.com/watch?v=3-AotYkeJqk
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.
Linganore, MD
Frederick Co.
United States 		Mussetter Rd. / Whiterose Dr. / Whiterose Way
(39.39008, -77.29747) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
41.1480 		Other (At-Grade)
Single-Lane 		2002 Painted splitter islands on three legs. Year Completed estimated (1988-2005).
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