28735 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
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.
Arlington, VA
Arlington Co.
United States
36th St. S / S Stafford St.
(38.82894, -77.08800)
Other
Existing
All-Way Yield
Unknown
3 Approaches
0 Driveways
0.0000
Other (At-Grade)
Single-Lane
Parking within circulatory roadway.
San Martín de Porres, Lima
Province of Lima
Peru
Avenida Naranjal / Avenue Canta Callao
(-11.97372, -77.08786)
Other
Existing
Unknown
Unknown
4 Approaches
0 Driveways
Other (At-Grade)
Multilane (3+ Lane)
Mount Vernon, VA
Fairfax Co.
United States
Mount Vernon Memorial Hwy
(38.71132, -77.08612)
Other
Existing
Unknown
Unknown
2 Approaches
0 Driveways
0.0000
Other (At-Grade)
Unknown
Parking along circulatory roadway.
Washington, DC
N/A Co.
United States
Ward Circle (Mass. Ave. / Nebraska Ave.)
(38.93792, -77.08590)
Signalized Roundabout/Circle
Existing
Signal
None
0 Approaches
0 Driveways
80.8214
Other (At-Grade)
Multilane (2 Lane, unspecified)
ICD estimated from Google Maps linework.
Talleysville, VA

United States
Emmaus Church Rd. / (unknown)
(37.50685, -77.08140)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
41.6873
Other (At-Grade)
Multilane (2 Lane, unspecified)
2008 Right-turn only lanes on all approaches with only one circulating lane. ICD estimated from Google Maps linework.
Chevy Chase, MD
Montgomery Co.
United States
Rosemary Circle [Rosemary St. / Hillcrest Pl. / Stanford St.]
(38.97789, -77.08055)
Other
Existing
All-Way Stop
Unknown
5 Approaches
0 Driveways
0.0000
Other (At-Grade)
Single-Lane
Parking along circulatory roadway.
Olney, MD
Montgomery Co.
United States
Fox Valley Dr. / Hillcroft Dr.
(39.12441, -77.07962)
Other
Existing
Unknown
Unknown
4 Approaches
0 Driveways
0.0000
Other (At-Grade)
Unknown
No splitter islands.
Washington, DC
N/A Co.
United States
Tenley Circle (Nebraska Ave. / Wisconsin Ave. / Yuma St.)
(38.94628, -77.07875)
Signalized Roundabout/Circle
Existing
Signal
None
0 Approaches
0 Driveways
73.3809
Other (At-Grade)
Multilane (2 Lane, unspecified)
ICD estimated from Google Maps linework.
Talleysville, VA

United States
Emmaus Church Rd. / (unknown)
(37.51449, -77.07822)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
43.5777
Other (At-Grade)
Multilane (2 Lane, unspecified)
2008 Right-turn only lanes on all approaches with only one circulating lane. ICD estimated from Google Maps linework.
Lima, Lima
Province of Lima
Peru
Avenida Universitaria / Vía Expresa Línea Amarilla
(-12.03577, -77.07769)
Signalized Roundabout/Circle
Existing
Signal
Unknown
4 Approaches
0 Driveways
Other (At-Grade)
Multilane (3+ Lane)
Washington, DC

United States
Chevy Chase Circle (Connecticut Ave. NW / Western Ave. NW / Chevy Chase Pkwy. NW / Grafton St.)
(38.96761, -77.07716)
Rotary
Existing
All-Way Yield
None
7 Approaches
0 Driveways
109.7280
Other (At-Grade)
Multilane (3+ Lane)
On boundary between DC and Maryland (Western Ave. is the boundary). Pedestrian access to central island.
Talleysville, VA

United States
New Kent Hwy. / Old Church Rd.
(37.52467, -77.07560)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
37.8885
Other (At-Grade)
Single-Lane
2008 Two free flowing right-turn bypass lanes ICD estimated from Google Maps linework.
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
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.
Lisbon, MD
Howard Co.
United States
MD 94 / MD 144
(39.33700, -77.07360)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
30.4800
Other (At-Grade)
Single-Lane
1993 First roundabout in Maryland. Built initially as temporary, made permanent after one month.
Alexandria, VA
Alexandria City
United States
Beverley Circle: Old Dominion Blvd. / Chalfonte Dr.
(38.83602, -77.07233)
Other
Existing
All-Way Stop
Unknown
3 Approaches
2 Driveways
0.0000
Other (At-Grade)
Single-Lane
Parking within circulatory roadway. No splitter islands.
Los Olivos, Lima
Province of Lima
Peru
Ovalo Infantas
(-11.94556, -77.07104)
Roundabout
Existing
All-Way Yield
Unknown
4 Approaches
0 Driveways
Freeway Ramps (Grade-Separated)
Multilane (3+ Lane)
Alexandria, VA
Alexandria City
United States
Washington Circle: Circle Hill Rd. / Beverley Dr. / Canyon Dr.
(38.83533, -77.07047)
Other
Existing
Other
Unknown
5 Approaches
0 Driveways
0.0000
Other (At-Grade)
Single-Lane
Pedestrian access to central island. No splitter islands. Mix of stop, yield, and uncontrolled entries.