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. |