Roundabouts Database

29679 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
Ellicott City, MD
Howard Co.
United States 		Hillsborough Rd. / English Morning Ln.
(39.25046, -76.79507) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
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.
Elmira, NY
Chemung Co.
United States 		Maple Ave. / Caldwell Ave.
(42.08399, -76.79589) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
8.8639 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2012 Year completed estimated (2011-2013). ICD estimated from Google Maps linework.
Lingelstown, PA
Dauphin Co.
United States 		Lingelstown Rd. / Blue Mountain Pkwy.
(40.34253, -76.79711) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
24.5782 		Other (At-Grade)
Single-Lane 		2011 Previously controlled by two-way stop ICD estimated from Google Maps linework.
Owings Mills, MD
Baltimore Co.
United States 		Ballard Green Dr. / Wilson Shannon Dr. / Julia Ln.
(39.39162, -76.80439) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2017 Year Completed estimated (2017-2018).
Horseheads, NY
Chemung Co.
United States 		Rte 13 / E. Franklin St.
(42.16756, -76.80553) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
32.7531 		Other (At-Grade)
Single-Lane 		2012 ICD estimated from Google Maps linework.
Horseheads, NY
Chemung Co.
United States 		Rte 13 / Horseheads Connector Rd.
(42.17077, -76.80564) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		2023
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
Toano, VA
James City Co.
United States 		Weathers Blvd. / Kenton Ct.
(37.40490, -76.80636) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Owings Mills, MD
Baltimore Co.
United States 		New Town Blvd. / Rangeford Dr.
(39.40957, -76.80654) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Long Reach, MD
Howard Co.
United States 		Shining Oceans Way / Dried Earth Blvd.
(39.18977, -76.80673) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Lake Arbor, MD
Prince George's Co.
United States 		Lake Arbor Way / Congressional Ct.
(38.90201, -76.80962) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Elmira, NY
Chemung Co.
United States 		N Main St. / Park Pl. / W 3rd St.
(42.09278, -76.80993) 		Roundabout
Existing 		All-Way Yield
None 		5 Approaches
0 Driveways
33.6780 		Other (At-Grade)
Single-Lane 		2019 https://www.mytwintiers.com/local-news-3/elmira-cultural-connectors-ribbon-cutting-took-place-and-the-roundabout-is-officially-open/ 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.
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.
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
26.8026 		Other (At-Grade)
Single-Lane 		2004 ICD estimated from Google Maps linework. Old Frederick Road is MD 985A but roundabout may be locally maintained and not state maintained
Reisterstown, MD
Baltimore Co.
United States 		Winged Foot Dr. / Crystal Downs Ct. / Kauri Cliffs Rd.
(39.42897, -76.81445) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Villages of Winterset, MD
Baltimore Co.
United States 		Runnymeade Rd. / New Town Blvd. / Bon Haven Ln.
(39.39893, -76.81700) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Horseheads, NY
Chemung Co.
United States 		Old Ithaca Rd. / Horseheads Connector Rd. / E St.
(42.17554, -76.81741) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		2023
Upper Marlboro, MD
Prince George's Co.
United States 		Thomas Sim Lee Terrace / Mary Digges Pl.
(38.81663, -76.81748) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Lake Arbor, MD
Prince George's Co.
United States 		Lake Arbor Way / Golf Course Dr.
(38.90618, -76.81975) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Owings Mills, MD
Baltimore Co.
United States 		Upper Mill Dr. / Bluestem Ct. /Spring Willow Ct. / Bayline Cir.
(39.41253, -76.82032) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Lake Arbor, MD
Prince George's Co.
United States 		Lake Arbor Way / Fairlakes Pl
(38.90717, -76.82304) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Savage, MD
Howard Co.
United States 		Washington St. / Foundry St.
(39.13656, -76.82513) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
18.2880 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2021 Painted splitter islands. Pedestrian crossing on west leg adjacent to circulatory roadway. https://www.howardcountymd.gov/News120121
Columbia, MD
Howard Co.
United States 		Tamar Dr. / Old Montgomery Rd.
(39.20533, -76.82822) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
30.4800 		Other (At-Grade)
Single-Lane 		2022 https://www.howardcountymd.gov/News090122c
Muncy, PA
Lycoming Co.
United States 		Lycoming Mall Circle
(41.24320, -76.82846) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
28.7372 		Other (At-Grade)
Single-Lane 		2009 ICD estimated from Google Maps linework.
Columbia, MD
Howard Co.
United States 		Oakland Mills Rd. / Old Montgomery Rd.
(39.20788, -76.83157) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
38.1000 		Other (At-Grade)
Single-Lane 		2017
Ellicott City, MD
Howard Co.
United States 		Columbia Rd. / Hemlock Cone Way / Kingscup Ct.
(39.24949, -76.83326) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
21.3360 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2019
Upper Marlboro, MD
Prince George's Co.
United States 		Woodyard Rd. / Observatory Pl.
(38.82198, -76.83374) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		Parking along circulatory roadway.
Columbia, MD
Howard Co.
United States 		Oakland Mills Rd. / MD 175 SB Ramps / (unknown)
(39.21308, -76.83456) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
36.5760 		Freeway Ramps (Grade-Separated)
Single-Lane 		2017 Year Completed estimated (2016-2017).
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.
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.
Summerfield, MD
Prince George's Co.
United States 		Saint Josephs Dr. / Grove Hurst Ln.
(38.91969, -76.84060) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
53.3400 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2012
Laurel, MD
Howard Co.
United States 		Weathered Stone Way / Boulder Ridge Rd. / Stone Lake Dr.
(39.13774, -76.84066) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
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
Bowie, MD
Prince George's Co.
United States 		Faircrest Circle
(38.92760, -76.84166) 		Other
Existing 		Unknown
Unknown 		2 Approaches
18 Driveways
0.0000 		Other (At-Grade)
Single-Lane
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.
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.
Upper Marlboro, MD
Prince George's Co.
United States 		Central Park Dr. / Rock Spring Dr.
(38.83296, -76.84354) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
50.2920 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2016
Laurel, MD
Howard Co.
United States 		Boulder Ridge Rd. / Polished Pebble Way
(39.13864, -76.84358) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Summerfield, MD
Prince George's Co.
United States 		Ruby Lockhart Blvd. / Taj Ln.
(38.92163, -76.84438) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
48.7680 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2011
Summerfield, MD
Prince George's Co.
United States 		Campus Way / Geaton Park Pl.
(38.92577, -76.84451) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
48.7680 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2011
Upper Marlboro, MD
Prince George's Co.
United States 		Rock Spring Dr. / (unknown)
(38.83762, -76.84567) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
51.8160 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2018 Year Completed estimated (2018-2019).
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.
Glenarden, MD
Prince George's Co.
United States 		Ruby Lockhart Blvd. / Campus Way
(38.92345, -76.84696) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
48.7680 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2011
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
Columbia, MD
Howard Co.
United States 		Stevens Forest Rd. / Farewell Rd. / Night Street Hill
(39.20114, -76.84781) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
27.4320 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2019
Glenarden, MD
Prince George's Co.
United States 		Campus Way N / Woodmore Center Dr.
(38.92263, -76.84787) 		Other
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		Inside shopping center. No splitter islands on northwest and southeast legs.
Glenarden, MD
Prince George's Co.
United States 		Campus Way N / McHugh Dr.
(38.92127, -76.84944) 		Other
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		Inside shopping center. No splitter islands on northwest and southeast legs.
Glenarden, MD
Prince George's Co.
United States 		Ruby Lockhart Blvd. / Evarts St. / Sir Michael Pl.
(38.92506, -76.84953) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
48.7680 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2011 Double left-turn and double right-turn movements.
Capitol Heights, MD
Prince George's Co.
United States 		Ritchie Station Ct. / (mall circulation road)
(38.86528, -76.84986) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
1 Driveways
41.1480 		Other (At-Grade)
Single-Lane 		2011 Year Completed estimated (2010-2011).
Capitol Heights, MD
Prince George's Co.
United States 		Hampton Park Blvd.
(38.87175, -76.85022) 		Roundabout
Existing 		All-Way Yield
Unknown 		2 Approaches
0 Driveways
57.9120 		Other (At-Grade)
Multilane (2 Lane, 2x2 max) 		2007 Yield signs but no entrance line or yield lines.
Columbia, MD
Howard Co.
United States 		Vantage Point Rd.
(39.22074, -76.85392) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown
Southport, NY
Chemung Co.
United States 		Pennsylvania Ave. / Rte 328 (SB Direction)
(42.04228, -76.85541) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
39.0266 		Other (At-Grade)
Single-Lane 		2016 Yield-controlled right-turn bypass lanes on north and west legs. Year Completed estimated (2013-2016). ICD estimated from Google Maps linework.
Laurel, MD
Prince George's Co.
United States 		Montrose Ave. / Harrison Dr.
(39.09979, -76.85955) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
24.3840 		Other (At-Grade)
Single-Lane 		2008 Year Completed estimated (2007-2008).
Summerfield, MD
Prince George's Co.
United States 		Ridgefield Blvd. / Chatsfield Way / Valley Trail Ln.
(38.89834, -76.86172) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Multilane (2 Lane, unspecified)
Spring Grove, PA
York Co.
United States 		Rte. 116 (Hanover St.) / Roths Church Rd. / W. Hanover St.
(39.88301, -76.86363) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
47.6567 		Other (At-Grade)
Single-Lane 		2007 http://www.yorkdispatch.com/local/ci_6708523 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.
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.
Newport, NC
Carteret Co.
United States 		White Sands Blvd. / Deer Run / Merry Woods Dr.
(34.80021, -76.86634) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
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.
Columbia, MD
Howard Co.
United States 		Owen Brown Rd. / Martin Rd.
(39.19989, -76.86930) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
28.9560 		Other (At-Grade)
Single-Lane 		2004 Year Completed estimated (2002-2005).
Harrisburg, PA
Dauphin Co.
United States 		Derry St. / Mulberry St.
(40.26312, -76.86948) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2022 https://theburgnews.com/news/project-to-make-harrisburgs-mulder-square-safer-greener-nears-completion
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.
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.
Ellicott City, MD
Howard Co.
United States 		Coventry Court Dr.
(39.27862, -76.87340) 		Other
Existing 		Unknown
Unknown 		2 Approaches
2 Driveways
0.0000 		Other (At-Grade)
Unknown
Lower Allen, PA
Cumberland Co.
United States 		Tisbury Circle
(40.22128, -76.87520) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Brandywine, MD
Prince George's Co.
United States 		MD 373 / Accokeek Rd. / MD 5 (Branch Ave.) SB On-Ramp
(38.70076, -76.87599) 		Roundabout
Existing 		All-Way Yield
None 		2 Approaches
0 Driveways
39.6240 		Freeway Ramps (Grade-Separated)
Single-Lane 		2019 MD 5 (Branch Ave.) was converted to limited access. https://www.thebaynet.com/articles/0419/newtrafficshiftstartsinbrandywineareathursday.html.
Southport, NY
Chemung Co.
United States 		Rte 328 / Pennsylvania Ave.
(42.03433, -76.87601) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
48.7894 		Other (At-Grade)
Single-Lane 		2015 ICD estimated from Google Maps linework.
Greenbelt, MD
Prince George's Co.
United States 		Hanover Pkwy. / (unknown)
(38.98589, -76.87602) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
24.3840 		Other (At-Grade)
Single-Lane 		2004 Year Completed estimated (2002-2005).
Konterra, MD
Prince George's Co.
United States 		Belle Chasse Blvd. / Belle Chasse Blvd. (southeast)
(39.07714, -76.87923) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Konterra, MD
Prince George's Co.
United States 		Belle Chasse Blvd. / Belle Chasse Blvd. (north)
(39.07820, -76.87960) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Konterra, MD
Prince George's Co.
United States 		Belle Chasse Blvd. / (parking) (east)
(39.07499, -76.87964) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
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.
Konterra, MD
Prince George's Co.
United States 		Belle Chasse Blvd. / Belle Chasse Blvd. (southwest)
(39.07731, -76.88037) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Konterra, MD
Prince George's Co.
United States 		Belle Chasse Blvd. / Belle Chasse Blvd. (south)
(39.07274, -76.88060) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Konterra, MD
Prince George's Co.
United States 		Belle Chasse Blvd. / (parking) (west)
(39.07512, -76.88073) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Columbia, MD
Howard Co.
United States 		Charter Dr. / (parking)
(39.21273, -76.88310) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
27.4320 		Other (At-Grade)
Single-Lane 		2013 Converted from cul-de-sac. Year Completed estimated (2011-2014).
Forestville, MD
Prince George's Co.
United States 		Donnell Pl.
(38.84109, -76.88405) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Harrisburg, PA
Dauphin Co.
United States 		N 7th St. / Reily St.
(40.27393, -76.88481) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown 		2022
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.
Laurel, MD
Prince George's Co.
United States 		W Side Blvd. / (parking)
(39.08512, -76.89003) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Harrisburg, PA
Dauphin Co.
United States 		N 2nd St. / Verbeke St.
(40.26853, -76.89149) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
21.9456 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2022 Year Completed estimated (2021-2022).
Harrisburg, PA
Dauphin Co.
United States 		N 2nd St. / Reily St.
(40.27050, -76.89293) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
21.9456 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2022 Year Completed estimated (2021-2022).
Manchester, MD
Carroll Co.
United States 		Fridinger Mill Rd. / Millie Way / Hallie Ave.
(39.67369, -76.89427) 		Other
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
24.3840 		Other (At-Grade)
Single-Lane 		Painted splitter islands on three legs; no splitter island on fourth leg.
Harrisburg, PA
Dauphin Co.
United States 		N 2nd St. / Kelker St.
(40.27418, -76.89553) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
18.2880 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2022
Greenbelt, MD
Prince George's Co.
United States 		Golden Triangle Dr. / (parking)
(38.99762, -76.89644) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown
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.
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.
South Laurel, MD
Prince George's Co.
United States 		Frost Pl. / (parking)
(39.09016, -76.90091) 		Other
Existing 		Unknown
Unknown 		2 Approaches
1 Driveways
0.0000 		Other (At-Grade)
Single-Lane
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.
West Friendship, MD
Howard Co.
United States 		Castlebridge Rd. / Hunter's View Rd.
(39.24552, -76.90189) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
42.6720 		Other (At-Grade)
Single-Lane 		2006
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.
Ellicott City, MD
Howard Co.
United States 		Lancelot Cross / Butterfruit Way / Argent Path / Stardust Ln.
(39.28522, -76.90384) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
57.9120 		Other (At-Grade)
Single-Lane 		1998 Year Completed estimated (1993-2002).
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 		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 		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 		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.
Camp Springs, MD
Prince George's Co.
United States 		Telfair Blvd. / Midtown Square
(38.82920, -76.90940) 		Other
Existing 		Uncontrolled
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
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.