Roundabouts Database

28782 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
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.
Brunswick, MD
Frederick Co.
United States 		Potomac View Parkway / Volunteer Drive
(39.33145, -77.63483) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
34.1808 		Other (At-Grade)
Single-Lane 		2010 ICD estimated from Google Maps linework.
Baltimore, MD
Baltimore City Co.
United States 		Old Frederick Road / Maple Wood Road
(39.29094, -76.69283) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
25.8815 		Other (At-Grade)
Single-Lane 		2013 4th leg not built yet - for future development ICD estimated from Google Maps linework.
Baltimore, MD
Baltimore City Co.
United States 		Wilkens Ave / Mount St / Ramsey St
(39.28325, -76.64332) 		Roundabout
Existing 		All-Way Yield
None 		5 Approaches
0 Driveways
31.4310 		Other (At-Grade)
Single-Lane 		2001 Completed prior to 2002 ICD estimated from Google Maps linework.
Baltimore, MD
Baltimore City Co.
United States 		Canterbury Rd. / W 39th St.
(39.33569, -76.62047) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
16.6275 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2013 ICD estimated from Google Maps linework.
Elkridge, MD
Howard Co.
United States 		Elkridge Crossing Way / Doctor Patel Dr.
(39.21091, -76.72512) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
31.4634 		Other (At-Grade)
Single-Lane 		2007 East leg stubbed for future. ICD estimated from Google Maps linework.
Essex, MD
Baltimore Co.
United States 		Southeast Blvd. (MD 702) / Hyde Park Rd.
(39.29884, -76.43951) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
40.6663 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2006 Built as temporary installation, then converted to permanent design. ICD estimated from Google Maps linework.
Owings Mills, MD
Baltimore Co.
United States 		Tollgate Rd. / Lastgage Rd.
(39.42149, -76.78482) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
28.6010 		Other (At-Grade)
Single-Lane 		2004 ICD estimated from Google Maps linework.
Sykesville, MD
Carroll Co.
United States 		Smithfield Ave. / Warfield Ave.
(39.37673, -76.96410) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
47.0835 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2007 Elliptical shape. ICD estimated from Google Maps linework.
Bowie, MD
Prince George's Co.
United States 		Melford Blvd. / Science Dr.
(38.96089, -76.71320) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
43.6480 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2008 Concentric striping in circulatory roadway. ICD estimated from Google Maps linework.
Bowie, MD
Prince George's Co.
United States 		Melford Blvd. / Curie Dr.
(38.95842, -76.70683) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
78.9406 		Other (At-Grade)
Single-Lane 		2008 ICD estimated from Google Maps linework.
Abingdon, MD
Harford Co.
United States 		Merchants Blvd. / Wegmans Blvd.
(39.46815, -76.30901) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
29.5039 		Other (At-Grade)
Single-Lane 		2012 ICD estimated from Google Maps linework.
Laurel, MD
Howard Co.
United States 		Whiskey Bottom Rd. / All Saints Rd.
(39.12478, -76.84257) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
25.9428 		Other (At-Grade)
Single-Lane 		2007 ICD estimated from Google Maps linework.
Laurel, MD
Howard Co.
United States 		Stephens Rd. / Whiskey Bottom Rd.
(39.12704, -76.84608) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
29.6480 		Other (At-Grade)
Single-Lane 		2005 ICD estimated from Google Maps linework.
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.
Konterra, MD
Prince George's Co.
United States 		Bentley Park Dr. / Parkgate Dr.
(39.09112, -76.91733) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
33.5280 		Other (At-Grade)
Single-Lane 		2015
Perry Hall, MD
Baltimore Co.
United States 		E Joppa Rd. / Scott Moore Way / Cowenton Ave.
(39.40290, -76.44124) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
38.1000 		Other (At-Grade)
Single-Lane 		2008 Right-turn bypass lane on west leg.
Hagerstown, MD
Washington Co.
United States 		Hagers Crossing Dr. / Bartow Dr. / Sedgwick Way
(39.65981, -77.75932) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2003 Year Completed estimated (1999-2005).
Robinwood, MD
Washington Co.
United States 		Yale Dr. / Medical Campus Rd. / Caring Pathway Ln.
(39.62594, -77.68707) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2016 Right-turn bypass lane on southwest leg.
Linganore, MD
Frederick Co.
United States 		Boyers Mill Rd. / Eaglehead Dr.
(39.41912, -77.30650) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
33.5280 		Other (At-Grade)
Single-Lane 		2018
Ballenger Creek, MD
Frederick Co.
United States 		Jefferson Technology Pkwy. / Jefferson Station Blvd.
(39.39223, -77.45291) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
42.6720 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2014 Year Completed estimated (2013-2015).
Ballenger Creek, MD
Frederick Co.
United States 		Holiday Dr. / Spectrum Dr.
(39.38178, -77.40206) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
44.1960 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2008 Left turn lane trap in circulatory roadway.
Bel Air North, MD
Harford Co.
United States 		Red Pump Rd. / Yankee Doodle Dr.
(39.54551, -76.37994) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2010