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
Gambrills, MD
Anne Arundel Co.
United States
2498 Mt Tabor Rd
(38.99855, -76.66414)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
22.2765
Other (At-Grade)
Single-Lane
2007 ICD estimated from Google Maps linework.
Greenbelt, MD
Prince George's Co.
United States
Cherrywood Ln. / Greenbelt Metro Dr.
(39.00985, -76.90330)
Roundabout
Existing
All-Way Yield
Other
3 Approaches
0 Driveways
24.1290
Other (At-Grade)
Single-Lane
2012 Raised crosswalks. ICD estimated from Google Maps linework.
Havre de Grace, MD
Harford Co.
United States
Chapel Rd. / Bulle Rock Pkwy.
(39.55465, -76.12813)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
34.9922
Other (At-Grade)
Single-Lane
2005 ICD estimated from Google Maps linework.
Havre de Grace, MD
Harford Co.
United States
Blenheim Farm Ln. / Bounding Home Ct.
(39.54665, -76.13521)
Other
Existing
All-Way Yield
None
4 Approaches
0 Driveways
30.3915
Other (At-Grade)
Single-Lane
2006 Painted splitter islands on north and south legs, no splitter islands on east and west legs. ICD estimated from Google Maps linework.
North East, MD
Cecil Co.
United States
Charlestown Crossing Blvd. / Claiborne Rd.
(39.59472, -75.97957)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
27.6095
Other (At-Grade)
Single-Lane
2011 ICD estimated from Google Maps linework.
Dundalk, MD
Baltimore Co.
United States
Dundalk Ave. / Sollers Point Rd.
(39.24534, -76.50786)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
24.9734
Other (At-Grade)
Single-Lane
2007 ICD estimated from Google Maps linework.
North East, MD
Cecil Co.
United States
Seahawk Dr. / (parking lot)
(39.64098, -75.95714)
Roundabout
Existing
All-Way Yield
None
3 Approaches
1 Driveways
28.5107
Other (At-Grade)
Single-Lane
2000 Year Completed estimated (1995-2005). ICD estimated from Google Maps linework.
Hampstead, MD
Carroll Co.
United States
MD 30 (Hampstead Bypass) / Business MD 30 (Hanover Pike)
(39.58178, -76.84261)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
56.1498
Other (At-Grade)
Multilane (2 Lane, unspecified)
2009 ICD estimated from Google Maps linework.
Hampstead, MD
Carroll Co.
United States
MD 30 (Hampstead Bypass) / MD 482 (Hampstead Mexico Rd.)
(39.61108, -76.86457)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
53.3657
Other (At-Grade)
Multilane (2 Lane, unspecified)
2009 ICD estimated from Google Maps linework.
Hampstead, MD
Carroll Co.
United States
MD-30 (Hampstead Bypass) / Business MD 30 (Hanover Pike)
(39.63466, -76.86675)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
49.6684
Other (At-Grade)
Multilane (2 Lane, unspecified)
2009 ICD estimated from Google Maps linework.
Windsor Mill, MD
Baltimore Co.
United States
Lord Baltimore Dr. / Wildlife Dr.
(39.31993, -76.75019)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
14.7833
Other (At-Grade)
Single-Lane
1998 Year Completed estimated (1993-2002). ICD estimated from Google Maps linework.
Windsor Mill, MD
Baltimore Co.
United States
Lord Baltimore Dr. / Glen Spring Rd. / Kettle Ct.
(39.31750, -76.75152)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
17.5558
Other (At-Grade)
Single-Lane
1998 Year Completed estimated (1993-2002). ICD estimated from Google Maps linework.
Queenstown, MD
Queen Anne's Co.
United States
Nesbit Rd. / Shoreway Dr.
(38.96600, -76.18291)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
Other (At-Grade)
Single-Lane
2011 Fourth leg stubbed.
Cumberland, MD
Allegany Co.
United States
US 220 / I-68 EB Ramps
(39.64367, -78.79099)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
34.0276
Freeway Ramps (Grade-Separated)
Single-Lane
2012 Built to facilitate U-turns. Teardrop shape. ICD estimated from Google Maps linework.
Chestertown, MD
Kent Co.
United States
MD 20 / MD 291 / (parking lot)
(39.21863, -76.07913)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
47.1899
Other (At-Grade)
Single-Lane
2015 ICD estimated from Google Maps linework.
Oxon Hill, MD
Prince George's Co.
United States
Oxon Hill Rd. / (parking lots)
(38.79166, -77.00416)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
26.0650
Other (At-Grade)
Single-Lane
2015 ICD estimated from Google Maps linework.
Oxon Hill, MD
Prince George's Co.
United States
Oxen Hill Rd. / Cedar Ridge Dr. / Panorama Dr.
(38.78452, -77.00597)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
34.4465
Other (At-Grade)
Single-Lane
2015 ICD estimated from Google Maps linework.
Fort Washington, MD
Prince George's Co.
United States
Oxon Hill Rd. / Kerby Hill Rd.
(38.77951, -77.00648)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
34.4490
Other (At-Grade)
Single-Lane
2015 ICD estimated from Google Maps linework.
Jessup, MD
Anne Arundel Co.
United States
National Business Pkwy. / Brock Bridge Rd.
(39.14025, -76.76395)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
44.4636
Other (At-Grade)
Multilane (2 Lane, unspecified)
2013 ICD estimated from Google Maps linework.
Hanover, MD
Anne Arundel Co.
United States
Watts Ave. / Clark Rd.
(39.15138, -76.72638)
Roundabout
Existing
All-Way Yield
None
2 Approaches
0 Driveways
25.9330
Other (At-Grade)
Single-Lane
2008 ICD estimated from Google Maps linework.
Hanover, MD
Anne Arundel Co.
United States
Ridge Rd. / Corporate Center Dr.
(39.19204, -76.70216)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
31.4719
Other (At-Grade)
Single-Lane
2004 ICD estimated from Google Maps linework.
Catonsville, MD
Baltimore Co.
United States
UMBC Blvd. / Research Park Dr.
(39.24874, -76.71580)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
44.3950
Other (At-Grade)
Single-Lane
2015 Elliptical shape. ICD estimated from Google Maps linework.
Catonsville, MD
Baltimore Co.
United States
Hilltop Cir. / UMBC Blvd.
(39.25178, -76.71442)
Rotary
Existing
All-Way Yield
None
4 Approaches
0 Driveways
60.1156
Other (At-Grade)
Multilane (2 Lane, unspecified)
2015 Lane changes needed for some through movements. ICD estimated from Google Maps linework.
Bel Air, MD
Harford Co.
United States
Tollgate Rd. / Macphail Rd.
(39.51959, -76.35208)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
19.8120
Other (At-Grade)
Single-lane w/ Traversable Central Island
2012
Friendship, MD
Anne Arundel Co.
United States
Solomons Island Rd. (MD 2) / Friendship Rd. (MD 261) / Sansbury Rd.
(38.73656, -76.59379)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
40.0594
Other (At-Grade)
Single-Lane
2008 ICD estimated from Google Maps linework.
Laurel, MD
Howard Co.
United States
Old Scaggsville Rd. / High Ridge Rd. / Running Deer Dr.
(39.11815, -76.86396)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
27.7985
Other (At-Grade)
Single-Lane
2015 ICD estimated from Google Maps linework.
Columbia, MD
Howard Co.
United States
Harpers Farm Rd. / Campus Dr.
(39.21534, -76.88023)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
31.4614
Other (At-Grade)
Single-Lane
2003 Originally had 4 legs. ICD estimated from Google Maps linework.
Ellicott City, MD
Howard Co.
United States
College Ave. / Bending Sky Way
(39.25754, -76.79122)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
26.8186
Other (At-Grade)
Single-Lane
2012 ICD estimated from Google Maps linework.
Aberdeen, MD
Harford Co.
United States
Philadelphia Rd. (MD 7) / Ashford Dr.. / Panell Dr.
(39.48593, -76.23873)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
41.4792
Other (At-Grade)
Single-Lane
2012 ICD estimated from Google Maps linework.
Aberdeen, MD
Harford Co.
United States
Tralee Cir. / Ashford Dr.
(39.48395, -76.23831)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
25.8100
Other (At-Grade)
Single-Lane
2003 ICD estimated from Google Maps linework.
Aberdeen, MD
Harford Co.
United States
Burnt Hill Trl. / Atlas Cedar Way / Thistle Hill Dr.
(39.49324, -76.22236)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
33.1799
Other (At-Grade)
Single-Lane
2008 ICD estimated from Google Maps linework.
Aberdeen, MD
Harford Co.
United States
Burnt HIll Trl. / Witch Hazel Way / Limestone Ct.
(39.49486, -76.22046)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
33.1791
Other (At-Grade)
Single-Lane
2008 ICD estimated from Google Maps linework.
Aberdeen, MD
Harford Co.
United States
Thistle Hill Dr. / Witchhazel Way
(39.49563, -76.22415)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
31.3355
Other (At-Grade)
Single-Lane
2008 ICD estimated from Google Maps linework.
Aberdeen, MD
Harford Co.
United States
Burnt Hill Trl. / Holly Oak Cir. / Woods Line Dr.
(39.49605, -76.21740)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
25.8055
Other (At-Grade)
Single-Lane
2007 ICD estimated from Google Maps linework.
Scaggsville, MD
Howard Co.
United States
MD 216 / Maple Lawn Blvd.
(39.14710, -76.90723)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
40.7543
Other (At-Grade)
Multilane (2 Lane, unspecified)
2005 Series of 4 roundabouts. Functional Class: Arterial ICD estimated from Google Maps linework.
Scaggsville, MD
Howard Co.
United States
MD 216 / Westside Blvd.
(39.14796, -76.90977)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
41.6801
Other (At-Grade)
Multilane (2 Lane, unspecified)
2009 Series of 4 roundabouts. Functional Class: Arterial ICD estimated from Google Maps linework.
Scaggsville, MD
Howard Co.
United States
Westside Blvd. / (parking lot)
(39.14952, -76.90856)
Roundabout
Existing
All-Way Yield
None
4 Approaches
0 Driveways
31.4909
Other (At-Grade)
Single-Lane
2008 ICD estimated from Google Maps linework.
Scaggsville, MD
Howard Co.
United States
Maple Lawn Blvd. / Tawes St.
(39.15364, -76.90125)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
34.2675
Other (At-Grade)
Multilane (2 Lane, unspecified)
2006 ICD estimated from Google Maps linework.
Scaggsville, MD
Howard Co.
United States
Maple Lawn Blvd. / Iager Blvd.
(39.15816, -76.90440)
Roundabout
Existing
All-Way Yield
None
3 Approaches
0 Driveways
33.3392
Other (At-Grade)
Multilane (2 Lane, unspecified)
2005 ICD estimated from Google Maps linework.
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.
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.
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
(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.
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.
(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.
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.
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.
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.
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
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.
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.
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.
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.
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.