| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| Derry Township,
                PA Dauphin County United States | Bachmanville Rd. / Homestead Rd. (40.26233, -76.63657) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 41.1480 | Other (At-Grade) Single-Lane | 2024 | |
| Hershey,
                PA Dauphin Co. United States | SR 322 / Homestead Ln (40.27526, -76.63332) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.4484 | Other (At-Grade) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| Cockeysville,
                MD Baltimore Co. United States | Lord Byron Ln. / Duke of York Ln. (39.46487, -76.63164) | Other Existing | Unknown Unknown | 3 Approaches 1 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| 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. | 
| Hershey,
                PA Dauphin Co. United States | SR 322 / Meadow Ln (40.27467, -76.62551) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.0936 | Other (At-Grade) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| Owings,
                MD Calvert Co. United States | Good Shepherd Way / Megatha Ln. (38.71846, -76.62480) | Other Existing | Uncontrolled Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Glen Burnie,
                MD Anne Arundel Co. United States | Hancock Ln. / Mayflower Cir. (39.14357, -76.62097) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | ||
| 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. | 
| Millersville,
                MD Anne Arundel Co. United States | Brightview Dr. / Galiot Dr. / Tremont Dr. (39.11196, -76.62028) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.4800 | Other (At-Grade) Single-Lane | 2008 | |
| 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. | 
| Baltimore,
                MD Baltimore City United States | Washington Pl. / Mount Vernon Pl. (39.29756, -76.61568) | Signalized Roundabout/Circle Existing | Signal Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Huntingtown,
                MD Calvert Co. United States | Lorins Dr. / Cambridge Dr. / Stephanies Ln. (38.60541, -76.61564) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands; pedestrian access to central island. | |
| Owings,
                MD Calvert Co. United States | Cross Point Dr. / Blue Sky Ct. / Bear Claw Ct. (38.71468, -76.61554) | Other Existing | Unknown Unknown | 3 Approaches 4 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| 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 | |
| Owings,
                MD Calvert Co. United States | Cross Point Dr. / Paulyn Dr. (38.71532, -76.61335) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| 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. / 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. | 
| Dulaney Forest,
                MD Baltimore Co. United States | E Ridgely Rd. / Margate Rd. (39.43199, -76.60754) | Traffic Calming Circle Existing | All-Way Yield None | 4 Approaches 0 Driveways 19.8120 | Other (At-Grade) Single-Lane | 2013 | No raised splitter islands on side street. Year Completed estimated (2012-2014). | 
| Prince Frederick,
                MD Calvert Co. United States | Frederick Blvd. / Auto Dr. (38.56178, -76.60339) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.6720 | Other (At-Grade) Single-Lane | 2009 | Year Completed estimated (2007-2009). | 
| Baltimore,
                MD Baltimore City United States | New Hope Circle (39.29360, -76.60289) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | Pedestrian access to central island. Parking along circulatory roadway. | |
| 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 | 
| Baltimore,
                MD Baltimore City United States | S President St. / Aliceanna St. (39.28317, -76.60158) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands on three legs. | |
| Baltimore,
                MD Baltimore City United States | Whetstone Way / (parking) (39.26820, -76.60021) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Newfield Hamlet,
                NY Tompkins Co. United States | Elira Rd. (Rte 13) / Trumbull Corners Rd. (Rte 133) (42.36021, -76.59969) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 32.6531 | Other (At-Grade) Single-Lane | 2018 | ICD estimated from Google Maps linework. | 
| Stewartstown,
                PA York Co. United States | Bailey Dr. / (parking) (39.75459, -76.59740) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | ||
| Suffolk,
                VA Suffolk City United States | Kings Grant Cir. / Queens Point Dr. (36.77752, -76.59713) | Other Existing | Unknown Unknown | 3 Approaches 2 Driveways 0.0000 | Other (At-Grade) Unknown | Pedestrian access to central island. | |
| Huntingtown,
                MD Calvert Co. United States | Marley Run / Channel Ct. / Plainview Dr. (38.60911, -76.59709) | Other Existing | Uncontrolled Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Prince Frederick,
                MD Calvert Co. United States | Prince Frederick Blvd. / Chapline Place Blvd. (38.55239, -76.59551) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 1998 | Year Completed estimated (1993-2003). Initially constructed as two-lane roundabout with concentric striped circulatory roadway. Converted to single-lane roundabout 2007-2009. | 
| Kingston,
                ON Frontenac Canada | Cataraqui Woods Dr. / Woodhaven Dr. (44.26739, -76.59501) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 24.8022 | Other (At-Grade) Single-Lane | 2013 | ICD estimated from Google Maps linework. | 
| Prince Frederick,
                MD Calvert Co. United States | Cambridge Pl. / Allnutt Ct. / (parking) (38.54943, -76.59467) | Other Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| 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. | 
| Huntingtown,
                MD Calvert Co. United States | Barberry Dr. / Spears Rd. / Blueberry Ct. (38.62290, -76.59347) | Other Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | Pedestrian access to central island. | |
| Pasadena,
                MD Anne Arundel Co. United States | Ashberry Ln. / Dewberry Ln. / Dewberry Cir. (39.13099, -76.59326) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | ||
| Kingston,
                ON Frontenac Canada | Cataraqui Wood Dr. / Holden St. (44.26729, -76.58991) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 23.9470 | Other (At-Grade) Single-Lane | 2013 | ICD estimated from Google Maps linework. | 
| Prince Frederick,
                MD Calvert Co. United States | Prince Frederick Blvd. / Thoroughbred Dr. / Equestrian Way (38.53171, -76.58916) | Other Existing | Uncontrolled Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Prince Frederick,
                MD Calvert Co. United States | MD 402 Dares Beach Rd. / Armory Rd. (38.54877, -76.58590) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2014 | |
| Huntingtown,
                MD Calvert Co. United States | Mairfield Ln. / Liberty Ln. / Fairwood Dr. (38.60411, -76.58464) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 42.6720 | Other (At-Grade) Single-Lane | 2014 | Painted splitter islands added 2017. | 
| Severna Park,
                MD Anne Arundel Co. United States | East West Blvd. / Jumpers Hole Rd. / Adler Ct. (39.10765, -76.58306) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 65.5320 | Other (At-Grade) Single-Lane | 1998 | Elliptical shape. ICD 225 ft x 200 ft. Year Completed estimated (1994-2002). | 
| Maytown,
                PA Lancaster Co. United States | N River St. / W High St. (40.07541, -76.58208) | Other Existing | One-Way/Two-Way Stop Unknown | 4 Approaches 0 Driveways 36.5559 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Prince Frederick,
                MD Calvert Co. United States | Silverwood Ln. / English Oak Ln. / Running Brook Way (38.54713, -76.58000) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 27.4320 | Other (At-Grade) Single-Lane | 2007 | |
| Campbelltown,
                PA Lebanon Co. United States | SR 117 / Northside Dr. (40.28457, -76.57339) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 31.8879 | Other (At-Grade) Single-Lane | 2011 | Yield-controlled right-turn bypass lane on north leg. ICD estimated from Google Maps linework. | 
| Londontowne,
                MD Anne Arundel Co. United States | Southdown Rd. / Landing Rd. / Decker Pl. (38.93983, -76.57211) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Pasadena,
                MD Anne Arundel Co. United States | Creekside Village Blvd. / Oak Creek Dr. (39.16938, -76.57165) | Other Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter island on southeast leg. | |
| Londontowne,
                MD Anne Arundel Co. United States | Millhaven Dr. / Two Rivers Dr. / Tilden Way (38.93715, -76.56159) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 33.5280 | Other (At-Grade) Single-Lane | 2006 | Converted from open intersection. Year Completed estimated (2005-2006). | 
| Parole,
                MD Anne Arundel Co. United States | Riva Trace Pkwy. / Winters Chase Way (38.96098, -76.56114) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | ||
| Kingston,
                ON Frontenac Canada | Resource Rd. / Centennial Dr. (44.27700, -76.55971) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 48.0000 | Other (At-Grade) Single-Lane | 2018 | Year Completed estimated (2017-2019). | 
| Huntingtown,
                MD Calvert Co. United States | Queensberry Dr. / Larkspur Ct. (38.58450, -76.55968) | Other Existing | Unknown Unknown | 3 Approaches 4 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Kingston,
                ON Frontenac Canada | Centennial Dr. / Venture Dr. (44.27265, -76.55935) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 43.6137 | Other (At-Grade) Single-Lane | 2011 | ICD estimated from Google Maps linework. | 
| Chesapeake Beach,
                MD Calvert Co. United States | Harrison Blvd. / Sansbury Dr. (38.69561, -76.55797) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 24.3840 | Other (At-Grade) Single-Lane | 1997 | Year Completed estimated (1993-2004). | 
| Marietta,
                PA Lancaster Co. United States | W Market St. / S Gay St. (40.05620, -76.55728) | Other Existing | Other Unknown | 4 Approaches 0 Driveways 30.1671 | Other (At-Grade) Single-Lane | Stop control on Gay Street; yield control on Market Street. Parking within square. ICD estimated from Google Maps linework. | |
| Parole,
                MD Anne Arundel Co. United States | Housley Rd. / Gateway Village Dr. / Annapolis Ridge Rd. (38.98793, -76.55715) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.1480 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2000 | Right-turn-only lanes on north and south legs. Year Completed estimated (1998-2002). Converted from unstriped two-lane roundabout in 2008-2009. | 
| Huntingtown,
                MD Calvert Co. United States | Queensberry Dr. / Carlon Ct. / Duchess Ln. / (unknown) (38.58381, -76.55492) | Other Existing | All-Way Yield Unknown | 5 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Prince Frederick,
                MD Calvert Co. United States | Oakland Hall Rd. / Abbott Ln. / Bunker Hill Rd. (38.50147, -76.55177) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2015 | Year Completed estimated (2014-2015). | 
| Huntingtown,
                MD Calvert Co. United States | Huntsman Dr. / Horse Pen Run / Hardesty Rd. (38.57357, -76.54875) | Other Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| 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. | 
| (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. | 
| Fleming,
                NY Cayuga Co. United States | W Lake Rd. / White Bridge Rd. / Lake Ave. / Sand Beach Rd. / (park access) (42.90470, -76.54446) | Rotary Existing | Other None | 5 Approaches 0 Driveways 109.7280 | Other (At-Grade) Single-Lane | Mixture of Yield and Stop signs. | |
| Annapolis,
                MD Anne Arundel Co. United States | Bywater Rd. (38.96731, -76.52788) | Other Existing | Unknown Unknown | 2 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Gloucester,
                VA Gloucester Co. United States | W Main St. / Waltons Ln. / Fox Centre Pkwy. (37.39841, -76.52674) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 37.9525 | Other (At-Grade) Single-Lane | 2005 | West of Route 17, near Walmart and Home Depot retail. ICD estimated from Google Maps linework. | 
| California,
                MD St. Mary's Co. United States | FDR Blvd. / Old Rolling Rd. (38.29057, -76.51176) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2018 | Year Completed estimated (2015-2020). | 
| 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. | 
| Newport News,
                VA Newport News City United States | Siemens Way / McManus Blvd. (37.13199, -76.50734) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.0040 | Other (At-Grade) Single-Lane | 2018 | Year Completed estimated (2017-2018). | 
| Saint Leonard,
                MD Calvert Co. United States | Calvert Beach Rd. / MD 765 Saint Leonard Rd. (38.47316, -76.50607) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 25.2460 | Other (At-Grade) Single-Lane | 2002 | 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. | 
| California,
                MD St. Mary's Co. United States | FDR Blvd. / Kinnegad Dr. / Castletown Way (38.28887, -76.50263) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2016 | Year Completed estimated (2013-2019). | 
| Ithaca,
                NY Tompkins Co. United States | Spencer St. / Elmira Rd. / Park St. / Albany St. (42.43167, -76.50152) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 34.3790 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Suffolk,
                VA United States | Governors Pointe Dr. / Tindalls Ct. / Wentworth Ct. (36.89513, -76.49969) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 24.8338 | Other (At-Grade) Single-Lane | 2004 | No splitter islands. ICD estimated from Google Maps linework. | 
| South Hill,
                NY Tompkins Co. United States | Alumni Cir. / Conservatory Dr. / Grant Egbert Blvd. (42.42153, -76.49961) | Other Existing | Other Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Multilane (2 Lane, unspecified) | Stop control on circulatory roadway. | |
| California,
                MD St. Mary's Co. United States | Amber Dr. (FDR Blvd.) / Athlone Dr. / Meath Rd. (38.28865, -76.49920) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2016 | Year Completed estimated (2013-2019). | 
| Annapolis,
                MD Anne Arundel Co. United States | Church Circle (38.97848, -76.49269) | Other Existing | Unknown Unknown | 7 Approaches 0 Driveways 0.0000 | Other (At-Grade) Multilane (3+ Lane) | ||
| Newport News,
                VA Newport News Co. United States | Avenue of the Arts / University Pl. / Shoe Ln. (37.06211, -76.49220) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.4977 | Other (At-Grade) Single-Lane | 2005 | Christopher Newport University entrance. ICD estimated from Google Maps linework. | 
| Annapolis,
                MD Anne Arundel Co. United States | State Circle (38.97890, -76.49063) | Other Existing | Unknown Unknown | 6 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | Maryland State House in central island. | |
| California,
                MD St. Mary's Co. United States | Saint Georges Hundred / Saint Johns Cir. / Saint Michaels Cir. (38.27383, -76.48964) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Lexington Park,
                MD St. Mary's Co. United States | FDR Blvd. / (parking) / (future road) (38.28732, -76.48888) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 42.6720 | Other (At-Grade) Single-Lane | 2023 | South leg stubbed. https://thebaynet.com/new-section-of-fdr-boulevard-opened-to-the-public/. | 
| Rossville,
                MD Baltimore Co. United States | Franklin Square Dr. / Upton Cir. (39.35121, -76.48864) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Newport News,
                VA United States | Thomas Wolfe St. / Phillip Roth St. (37.08515, -76.48840) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 16.1970 | Other (At-Grade) Single-Lane | 2005 | ICD estimated from Google Maps linework. | 
| Yorktown,
                VA York Co. United States | Market St. / Laydon Way / Peyton Randolph Dr. / Ellery St. (37.19264, -76.48809) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.4320 | Other (At-Grade) Single-Lane | 2014 | |
| Annapolis,
                MD Anne Arundel Co. United States | Main St. / Randall St. (38.97746, -76.48722) | Other Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Newport News,
                VA United States | Walt Whitman Ave. / Nat Turner Blvd. (37.08250, -76.48679) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 25.7255 | Other (At-Grade) Single-Lane | 2003 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Lexington Park,
                MD St. Mary's Co. United States | FDR Blvd. / MacArthur Blvd. (38.28609, -76.48549) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2023 | https://thebaynet.com/new-section-of-fdr-boulevard-opened-to-the-public/ | 
| Collegetown,
                NY Tompkins Co. United States | College Ave. / Oak Ave. (42.44258, -76.48522) | Unknown Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | Year Completed estimated (2021-2022). | |
| Perry Hall,
                MD Baltimore Co. United States | Seven Courts Dr. / Proctor Ln. (39.41060, -76.48483) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.4320 | Other (At-Grade) Single-Lane | 2008 | Year Completed estimated (2007-2008). | 
| Newport News,
                VA United States | Walt Whitman Ave. / Mark Twain St. S (37.07856, -76.48437) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 23.8212 | Other (At-Grade) Single-Lane | 2004 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Annapolis,
                MD Anne Arundel Co. United States | King George St. / Turner Joy Rd. / Brownson Rd. (38.97776, -76.48280) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | On campus of US Naval Academy. | |
| Lexington Park,
                MD St. Mary's Co. United States | FDR Blvd. / Buck Hewitt Rd. (38.28398, -76.48121) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2023 | https://thebaynet.com/new-section-of-fdr-boulevard-opened-to-the-public/ | 
| Newport News,
                VA United States | Thimble Shoals Dr. / Town Center Dr. (37.08524, -76.47594) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 33.3467 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2006 | ICD estimated from Google Maps linework. | 
| Lexington Park,
                MD St. Mary's Co. United States | Columbus Dr. / Shining Willow Ln. / Creeping Primrose Ln. (38.26133, -76.46983) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Newport News,
                VA Newport News Co. United States | Villa Rd. / James River Dr. / Botetourt Rd. (37.03740, -76.46883) | Other Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.2278 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Suffolk,
                VA Suffolk City United States | Meadow View Blvd. / Meridian Pl. / Vineyard Pl. (36.85508, -76.46192) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | Pedestrian access to central island. | |
| Suffolk,
                VA Suffolk City United States | Island Park Circle (36.84622, -76.46002) | Other Existing | Unknown Unknown | 5 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | Pedestrian access to central island. | |
| Kingsville,
                MD Baltimore Co. United States | MD 147 (Harford Rd.) / Glen Arm Rd. / Mt Vista Rd. (39.46045, -76.45652) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.0397 | Other (At-Grade) Single-Lane | 2018 | https://www.baltimoresun.com/maryland/harford/aegis/ph-ag-harford-road-roundabout-20180102-story.html ICD estimated from Google Maps linework. | 
| Solomons,
                MD Calvert Co. United States | Farren Ave. / Charles St. (38.31939, -76.45267) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 21.3360 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2008 | Painted splitter islands. Year Completed estimated (2007-2009). | 
| Lebanon,
                PA Lebanon Co. United States | SR 241 (Colebrook Rd.) / Rocherty Rd. (40.30208, -76.44978) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2021 | https://lebtown.com/2021/10/11/3-4-million-roundabout-project-to-open-this-week-on-colebrook-road/ | 
| Lusby,
                MD Calvert Co. United States | HG Trueman Rd. (MD 765) / / Southern Connector Blvd. (38.36413, -76.44936) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 49.6319 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | Looks like it's being finished up in Oct 2008 on streetview. ICD estimated from Google Maps linework. | 
| Suffolk,
                VA United States | Plummer Blvd. / Belle Orchard Ln. (36.86074, -76.44528) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.8677 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2007 | ICD estimated from Google Maps linework. | 
| Essex,
                MD Baltimore Co. United States | Brett Ct. (39.32297, -76.44461) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Perry Hall,
                MD Baltimore Co. United States | Scott Moore Way / Honeygo Center Dr. (39.40491, -76.44142) | Other Existing | All-Way Yield Unknown | 3 Approaches 1 Driveways 0.0000 | Other (At-Grade) Single-Lane | Pedestrian access to central island. | |
| 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. | 
| 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. | 
| Suffolk,
                VA United States | Bon Secours Dr. / Harbour Towne Pkwy. (36.86884, -76.43764) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.3526 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. |