29410 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
Scaggsville, MD
Howard Co.
United States
Ice Crystal Dr. / Birchtree Ln.
(39.14355, -76.89912)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
28.7147
Other (At-Grade)
Single-Lane
2003 ICD estimated from Google Maps linework.
Oxon Hill, MD
Prince Georges Co.
United States
National Harbor Blvd. / American Way
(38.78227, -77.01099)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
30.7236
Other (At-Grade)
Multilane (2 Lane, unspecified)
2009 ICD estimated from Google Maps linework.
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.
Sykesville, MD
Carroll Co.
United States
Bennett Rd. / Monroe Ave.
(39.41306, -76.92967)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
26.7590
Other (At-Grade)
Single-Lane
2006 ICD estimated from Google Maps linework.
Westminster, MD
Carroll Co.
United States
Market St. / Gorsuch Rd.
(39.57010, -76.97452)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
26.6987
Other (At-Grade)
Single-Lane
2005 Right-turn bypass lanes on SW and SE quadrants. ICD estimated from Google Maps linework.
Waldorf, MD
Charles Co.
United States
Davis Rd. / (School entrance)
(38.63609, -76.97873)
Roundabout
Existing
All-Way Yield
None
2 Approaches
1 Driveways
33.5852
Other (At-Grade)
Single-Lane
2005 Functional Class: Local ICD estimated from Google Maps linework.
Adamstown, MD
Frederick Co.
United States
Mountville Rd. / Adams Common Dr.
(39.30643, -77.47158)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
28.6482
Other (At-Grade)
Single-Lane
2007 ICD estimated from Google Maps linework.
Glen Burnie, MD
Anne Arundel Co.
United States
George Clausse Blvd. / (parking access)
(39.14768, -76.64935)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
33.3442
Other (At-Grade)
Single-Lane
2008 RT lanes on eastbound and northbound approaches. Part of shopping center. ICD estimated from Google Maps linework.
Forest Hill, MD
Harford Co.
United States
MD 23 / Commerce Rd.
(39.57390, -76.37067)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
38.1000
Other (At-Grade)
Single-Lane
2008 On August 9, 2008 a new roundabout opened on Maryland Route 23 and an extended Commerce Drive in Forest Hill (Harford County), Maryland. It was built by a private developer to improve access to the Forest Hill Industrial Park by using Route 23, a limited access highway, rather than the current access road to Commerce Drive, Jarrettsville Road, which is primarily a residential route.
Fruitland, MD
Wicomico Co.
United States
Cedar Ln. / Division St.
(38.32094, -75.61021)
Roundabout
Existing
Unknown
Unknown
4 Approaches
0 Driveways
29.0473
Other (At-Grade)
Single-Lane
2007 ICD estimated from Google Maps linework.
Saint Leonard, MD
Calvert Co.
United States
Calvert Beach Rd. / Saint Leonard Rd.
(38.47316, -76.50607)
Roundabout
Existing
Unknown
Unknown
4 Approaches
0 Driveways
25.2461
Other (At-Grade)
Single-Lane
2002 ICD estimated from Google Maps linework.
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.
Hampstead, MD
Carroll Co.
United States
MD 88 / MD 833
(39.60434, -76.83682)
Roundabout
Existing
Unknown
Unknown
4 Approaches
0 Driveways
34.0470
Other (At-Grade)
Single-Lane
2004 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.
Clarksville, MD
Howard Co.
United States
Brighton Dam Rd. / Ten Oaks Rd.
(39.20491, -76.95455)
Roundabout
Existing
Unknown
Unknown
3 Approaches
0 Driveways
35.1680
Other (At-Grade)
Single-Lane
2008 ICD estimated from Google Maps linework.
Deale, MD
Anne Arundel Co.
United States
MD 256 / MD 258
(38.79327, -76.54586)
Roundabout
Existing
Unknown
Unknown
3 Approaches
0 Driveways
34.4423
Other (At-Grade)
Single-Lane
2006 ICD estimated from Google Maps linework.
Bel Air, MD
Harford Co.
United States
Constant Friendship Blvd. / BJ's
(39.45546, -76.31870)
Roundabout
Existing
Unknown
Unknown
3 Approaches
0 Driveways
29.5092
Other (At-Grade)
Single-Lane
1995 Functional Class: Local 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.
Odenton, MD
Anne Arundel Co.
United States
MD 175 / MD 677 / Higgins Dr.
(39.07831, -76.68481)
Roundabout
Existing
All-Way Yield
Unknown
5 Approaches
0 Driveways
57.9120
Other (At-Grade)
Multilane (2 Lane, unspecified)
2004 Reduced from two lanes to one lane in 2010. 21442
Lexington Park, MD
St. Marys Co.
United States
Tate Rd. / Shaw Rd.
(38.26955, -76.42012)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
31.8809
Other (At-Grade)
Single-Lane
2005 Y-shaped with right-turn bypass lanes. ICD estimated from Google Maps linework.
Burtonsville, MD
Montgomery Co.
United States
Dustin Rd. / US 29 SB Offramp / Columbia Pike
(39.12256, -76.92656)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
43.5482
Freeway Ramps (Grade-Separated)
Single-Lane
2006 Fatal crash October 14, 2007.: http://www.fredericknewspost.com/sections/news/display.htm?StoryID=66411. 11861-05. ICD estimated from Google Maps linework.
Stevensville, MD
Queen Annes Co.
United States
Thompson Creek Rd. / US 50 EB Ramps
(38.97599, -76.31046)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
16.7127
Freeway Ramps (Grade-Separated)
Single-lane w/ Traversable Central Island
2007 Mini-roundabout. ICD estimated from Google Maps linework.
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.
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
66.6797
Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified)
2002 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.
Mount Aetna, MD
Washington Co.
United States
MD 66 (Mapleville Rd.) / Mount Aetna Rd.
(39.60243, -77.62425)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
44.1703
Other (At-Grade)
Single-Lane
2002 ICD estimated from Google Maps linework.
Scaggsville, MD
Howard Co.
United States
Hopkins-Gorman Rd. / US 29 NB Ramps
(39.15846, -76.88660)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
59.2695
Other (At-Grade)
Multilane (2 Lane, unspecified)
2002 ICD estimated from Google Maps linework.
Abingdon, MD
Harford Co.
United States
Tollgate Rd. / Singer Rd.
(39.47828, -76.32727)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
25.8121
Other (At-Grade)
Single-Lane
1998 http://www.teachamerica.com/roundabouts/RA058B_ppr_Statmeyer.pdf#search=%22bel%20air%20roundabout%22 ICD estimated from Google Maps linework.
Fountain Green, MD
Harford Co.
United States
Prospect Mill Rd. / Wagner Rd.
(39.55824, -76.30247)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
31.3072
Other (At-Grade)
Single-Lane
2002 http://www.teachamerica.com/roundabouts/RA058B_ppr_Statmeyer.pdf#search=%22bel%20air%20roundabout%22 Functional Class: Collector ICD estimated from Google Maps linework.
Bel Air, MD
Harford Co.
United States
Moores Mill Rd. / Brushing Ln.
(39.54368, -76.32365)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
27.6298
Other (At-Grade)
Single-Lane
2001 http://www.teachamerica.com/roundabouts/RA058B_ppr_Statmeyer.pdf#search=%22bel%20air%20roundabout%22 ICD estimated from Google Maps linework.
Frogtown, MD
Harford Co.
United States
Mardic Dr. / Willrich Ct.
(39.57178, -76.37160)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
31.3011
Other (At-Grade)
Single-Lane
2001 http://www.teachamerica.com/roundabouts/RA058B_ppr_Statmeyer.pdf#search=%22bel%20air%20roundabout%22 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).
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).
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
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.
Hagerstown, MD
Washington Co.
United States
Virginia Ave. / Memorial Blvd. / Prospect St. / Key St.
(39.63728, -77.72873)
Other
Existing
Other
None
0 Approaches
0 Driveways
36.7900
Other (At-Grade)
Unknown
ICD estimated from Google Maps linework.
Hagerstown, MD
Washington Co.
United States
E. Irvin Ave. / Mealey Pkwy.
(39.65536, -77.70186)
Other
Existing
All-Way Stop
None
0 Approaches
0 Driveways
37.6999
Other (At-Grade)
Single-Lane
ICD estimated from Google Maps linework.
Hagerstown, MD
Washington Co.
United States
E. Irvin Ave. / View St. / Valleybrook Dr.
(39.65536, -77.70058)
Other
Existing
All-Way Stop
None
0 Approaches
0 Driveways
31.2633
Other (At-Grade)
Single-Lane
ICD estimated from Google Maps linework.
Hagerstown, MD
Washington Co.
United States
E. Magnolia Ave. / Mealey Pkwy.
(39.65762, -77.70140)
Other
Existing
All-Way Stop
None
0 Approaches
0 Driveways
32.1818
Other (At-Grade)
Single-Lane
ICD estimated from Google Maps linework.
Hagerstown, MD
Washington Co.
United States
E. Magnolia Ave. / E. Irvin Ave.
(39.65722, -77.69958)
Other
Existing
All-Way Stop
None
0 Approaches
0 Driveways
27.5846
Other (At-Grade)
Single-Lane
ICD estimated from Google Maps linework.
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
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
Greenbelt, MD
Prince Georges Co.
United States
Hanover Pkwy. / Village Park Dr. / Schrom Hills Community Park entrance
(38.98378, -76.87333)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
19.4960
Other (At-Grade)
Single-Lane
1998 Year Completed estimated (1994-2001). ICD estimated from Google Maps linework.
Urbana, MD
Frederick Co.
United States
Bennett Creek Ave. / Bennett Creek Blvd.
(39.32256, -77.34935)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
37.8808
Other (At-Grade)
Single-Lane
2000 ICD estimated from Google Maps linework.
Urbana, MD
Frederick Co.
United States
MD 355 / Sugarloaf Pkwy.
(39.32862, -77.35193)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
38.8013
Other (At-Grade)
Single-Lane
2000 ICD estimated from Google Maps linework.
Urbana, MD
Frederick Co.
United States
Bennett Creek Ave. / Bennett Creek Rd.
(39.32223, -77.35181)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
33.2613
Other (At-Grade)
Single-Lane
2000 ICD estimated from Google Maps linework.
Urbana, MD
Frederick Co.
United States
MD 355 / Sprigg St.
(39.33070, -77.35654)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
42.4954
Other (At-Grade)
Single-Lane
2000 ICD estimated from Google Maps linework.
Urbana, MD
Frederick Co.
United States
Bush Creek Dr. / Major Smith Ln.
(39.33507, -77.35263)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
28.6364
Other (At-Grade)
Single-Lane
2000 ICD estimated from Google Maps linework.
Urbana, MD
Frederick Co.
United States
Sugarloaf Pkwy. / Denison St.
(39.33490, -77.34180)
Roundabout
Existing
Unknown
Unknown
4 Approaches
0 Driveways
36.9503
Other (At-Grade)
Multilane (2 Lane, unspecified)
2000 ICD estimated from Google Maps linework.
Bel Air, MD
Harford Co.
United States
Tollgate Rd. / Wheel Rd.
(39.48999, -76.32914)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
28.5729
Other (At-Grade)
Single-Lane
1999 http://www.teachamerica.com/roundabouts/RA058B_ppr_Statmeyer.pdf#search=%22bel%20air%20roundabout%22 ICD estimated from Google Maps linework.
Scaggsville, MD
Howard Co.
United States
MD 216 / US 29 SB Ramps
(39.14562, -76.90418)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
53.7228
Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified)
2001 Series of 4 roundabouts. ICD estimated from Google Maps linework.
Scaggsville, MD
Howard Co.
United States
MD 216 / US 29 NB Ramps / Ice Crystal Dr.
(39.14476, -76.89799)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
53.7234
Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified)
2001 Series of 4 roundabouts. ICD estimated from Google Maps linework.
Millington, MD
Kent Co.
United States
MD 291 / US 301 SB Ramps
(39.26463, -75.86641)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
31.4393
Freeway Ramps (Grade-Separated)
Single-Lane
1999 Opened August 1999. ICD estimated from Google Maps linework.
Millington, MD
Kent Co.
United States
MD 291 / US 301 NB Ramps
(39.26386, -75.86260)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
28.6656
Freeway Ramps (Grade-Separated)
Single-Lane
1999 Opened August 1999. ICD estimated from Google Maps linework.
Rising Sun, MD
Cecil Co.
United States
MD 273 (Rising Sun Rd.) / MD 276 (Jacob Tome Memorial Hwy.)
(39.69595, -76.08018)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
39.5157
Other (At-Grade)
Single-Lane
2003 ICD estimated from Google Maps linework.
Rosemont, MD
Frederick Co.
United States
MD 17 / MD 180
(39.33768, -77.63950)
Roundabout
Existing
Unknown
Unknown
4 Approaches
0 Driveways
30.4828
Other (At-Grade)
Single-Lane
2001 ICD estimated from Google Maps linework.
Urbana, MD
Frederick Co.
United States
MD 80 / Sugarloaf Pkwy. / Bennett Creek Blvd.
(39.32467, -77.34974)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
52.6619
Other (At-Grade)
Multilane (2 Lane, unspecified)
2000 Rural ICD estimated from Google Maps linework.
Bel Air, MD
Harford Co.
United States
MD 7 / Holly Oaks Drive
(39.48848, -76.21669)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
34.1039
Other (At-Grade)
Single-Lane
1999 Opened September 1999. ICD estimated from Google Maps linework.
North Harford, MD
Harford Co.
United States
MD 165 / MD 24
(39.67220, -76.40930)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
32.1750
Other (At-Grade)
Single-Lane
2000 Rural Previously controlled by two-way stop ICD estimated from Google Maps linework.
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.
Temple Hills, MD
Prince Georges Co.
United States
MD 637 (Naylor Rd.) / Good Hope Ave.
(38.84922, -76.95655)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
31.6248
Other (At-Grade)
Single-Lane
2001 ICD estimated from Google Maps linework.
Temple Hills, MD
Prince Georges Co.
United States
MD 637 (Naylor Rd.) / Oxon Run Dr.
(38.84986, -76.95789)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
34.4150
Other (At-Grade)
Single-Lane
2001 ICD estimated from Google Maps linework.
Castle Marina, MD
Queen Annes Co.
United States
MD 18 / Castle Marina Rd.
(38.97871, -76.28938)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
28.7819
Other (At-Grade)
Single-Lane
1999 Previously controlled by two-way stop ICD estimated from Google Maps linework.
Columbia, MD
Howard Co.
United States
Cradlerock Way / Homespun Dr.
(39.19095, -76.83787)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
22.2158
Other (At-Grade)
Single-Lane
2001 Completed May 21, 2001. Previously controlled by one-way stop Functional Class: Collector 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.
(unincorporated), MD
Prince Georges Co.
United States
Ft. Washington Rd. / Swan Creek Rd.
(38.72498, -77.00491)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
25.1576
Other (At-Grade)
Single-Lane
1997 Fourth leg added. Year Completed estimated (before 2001). ICD estimated from Google Maps linework.
Bel Air, MD
Harford Co.
United States
Tollgate Rd. / Marketplace Dr.
(39.52092, -76.35262)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
28.5602
Other (At-Grade)
Single-Lane
1996 Three leg, off-set roundabout - off-set due to lack of r/w on top side of Functional Class: Collector ICD estimated from Google Maps linework.
Columbia, MD
Howard Co.
United States
Banneker Rd. / Cul-de-sac
(39.21141, -76.87041)
Traffic Calming Circle
Existing
Unknown
Unknown
3 Approaches
0 Driveways
17.5824
Other (At-Grade)
Single-Lane
Functional Class: Local ICD estimated from Google Maps linework.
Columbia, MD
Howard Co.
United States
Trotter Rd. / South Wind Cir.
(39.20956, -76.91891)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
23.1353
Other (At-Grade)
Single-Lane
1997 Functional Class: Collector. Year Completed estimated (1993-2001). ICD estimated from Google Maps linework.
(unincorporated), MD
Anne Arundel Co.
United States
Arundel Beach Rd. / Leelyn Dr.
(39.07955, -76.54560)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
25.9594
Other (At-Grade)
Single-Lane
1999 ICD estimated from Google Maps linework.
Brunswick, MD
Frederick Co.
United States
MD 17 / A St. / B St. / Maryland Ave.
(39.31433, -77.62807)
Roundabout
Existing
All-Way Yield
None
5 Approaches
0 Driveways
42.5054
Other (At-Grade)
Single-Lane
2000 ICD estimated from Google Maps linework.
Mount Rainier, MD
Prince Georges Co.
United States
US 1 / 34th St. / Perry St.
(38.93647, -76.96074)
Roundabout
Existing
All-Way Yield
None
5 Approaches
0 Driveways
41.1480
Other (At-Grade)
Multilane (2 Lane, 2x1 max)
2001 Oval shaped. ICD = 135 ft x 115 ft.
Lutherville-Timonium, MD
Baltimore Co.
United States
MD 139 (Charles St.) / Bellona Ave.
(39.41790, -76.62900)
Roundabout
Removed
All-Way Yield
None
4 Approaches
0 Driveways
28.9560
Other (At-Grade)
Multilane (2 Lane, unspecified)
1999 Two-lane circulatory roadway across northern half.
Abingdon, MD
Harford Co.
United States
Tollgate Rd. / Montrose Way
(39.48198, -76.32751)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
28.5762
Other (At-Grade)
Single-Lane
2003 Elementary school and library to north, another school to south. Functional Class: Collector ICD estimated from Google Maps linework.
Bel Air, MD
Harford Co.
United States
Tollgate Rd. / Westover Ln. / Crisfield Dr.
(39.46859, -76.32162)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
26.7377
Other (At-Grade)
Single-Lane
2002 http://www.teachamerica.com/roundabouts/RA058B_ppr_Statmeyer.pdf#search=%22bel%20air%20roundabout%22 Previously controlled by two-way stop Functional Class: Collector ICD estimated from Google Maps linework.
Ritchie, MD
Prince Georges Co.
United States
Ritchie-Marlboro Rd. / I-95 SB Ramps
(38.86894, -76.84738)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
770.9968
Freeway Ramps (Grade-Separated)
Multilane (3+ Lane)
2001 Opening initially with two lanes. Expanded from two lanes to three lanes in 2010. 21442
Ritchie, MD
Prince Georges Co.
United States
Ritchie-Marlboro Rd. / I-95 NB Ramps
(38.86824, -76.84158)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
67.0560
Freeway Ramps (Grade-Separated)
Multilane (3+ Lane)
2001 Opened initially with two lanes. Expanded from two lanes to three lanes in 2010. 21442
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.
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.
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.
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.
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.
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
Federalsburg, MD
Caroline Co.
United States
MD 307 / MD 313 / MD 318
(38.68938, -75.78949)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
35.4247
Other (At-Grade)
Single-Lane
1999 Rural, installed for safety reasons Previously controlled by two-way stop ICD estimated from Google Maps linework.
Annapolis, MD
Anne Arundel Co.
United States
Gateway Circle [MD 450 (West St.) / Taylor Ave. / Spa Rd.]
(38.97630, -76.50486)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
54.8640
Other (At-Grade)
Multilane (2 Lane, unspecified)
1999 Elliptical shaped. ICD = 180 ft x 160 ft. Opened December 1999.
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.
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.
Lothian, MD
Anne Arundel Co.
United States
MD 2 / MD 408 / MD 422
(38.82973, -76.61590)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
28.8423
Other (At-Grade)
Single-Lane
1995 Completed October 1995. ICD estimated from Google Maps linework.
Elkton, MD
Cecil Co.
United States
MD 213 (Fair Hill Rd.) / Leeds Rd. / Elk Mill Rd. (Lanzi Circle)
(39.66364, -75.85529)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
34.0178
Other (At-Grade)
Single-Lane
1995 Previously controlled by two-way stop. Functional Class: Arterial ICD estimated from Google Maps linework.
Cearfoss, MD
Washington Co.
United States
MD 63 / MD 58 / MD 494 (Cearfoss Pike)
(39.70017, -77.77593)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
35.0520
Other (At-Grade)
Single-Lane
1995 Completed December 1995.
Towson, MD
Baltimore Co.
United States
MD 45 / MD 146 / Joppa Rd. / Allegheny Ave.
(39.40185, -76.60230)
Roundabout
Existing
All-Way Yield
None
5 Approaches
0 Driveways
47.9892
Other (At-Grade)
Multilane (2 Lane, unspecified)
1998 Opened October 1998. Exit striping retrofitted to roundabout after opening. Hotdog/racetrack shape. ICD estimated from Google Maps linework. 21442
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
26.8027
Other (At-Grade)
Single-Lane
2004 ICD estimated from Google Maps linework.
Baltimore, MD
Baltimore City Co.
United States
Guilford Ave. / 22nd St.
(39.31441, -76.61263)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
6.4682
Other (At-Grade)
Single-lane w/ Traversable Central Island
2012 ICD estimated from Google Maps linework.
Baltimore, MD
Baltimore City Co.
United States
Guilford Ave. / E 24th St.
(39.31650, -76.61276)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
9.2400
Other (At-Grade)
Single-lane w/ Traversable Central Island
2012 ICD estimated from Google Maps linework.
Baltimore, MD
Baltimore City Co.
United States
Guilford Ave. / E 32nd St.
(39.32703, -76.61345)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
Other (At-Grade)
Single-lane w/ Traversable Central Island
2012
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.
Brunswick, MD
Frederick Co.
United States
MD 17 / Rosemont Drive / Dutchmans Creek
(39.33480, -77.63671)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
43.4167
Other (At-Grade)
Multilane (2 Lane, unspecified)
2010 ICD estimated from Google Maps linework.
Brunswick, MD
Frederick Co.
United States
MD 17 / Volunteer Drive
(39.33261, -77.63365)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
36.9516
Other (At-Grade)
Multilane (2 Lane, unspecified)
2010 ICD estimated from Google Maps linework.
Brunswick, MD
Frederick Co.
United States
Potomac View Parkway / Dutchmans Creek
(39.33265, -77.63770)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
32.3326
Other (At-Grade)
Single-Lane
2010 ICD estimated from Google Maps linework.