29410 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
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.
Lisbon, MD
Howard Co.
United States
MD 94 / Old Frederick Rd. (Lisbon North)
(39.34810, -77.06930)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
26.7839
Other (At-Grade)
Single-Lane
1999 ICD estimated from Google Maps linework.