Roundabouts Database Index

29410 Results

Search by location, intersection, and comments with the Quick Search below. You can search all other attributes by clicking Advanced Search. Sort results by clicking the headers of any column. Click the Intersection name for a details and aerial view. Search results pages can be bookmarked. Results can be exported to KML for viewing in Google Earth.

City, State County Country	Intersection (Lat, Lng)	Type Status	Control Type / Other Control Type	Approaches / Driveways / ICD (m)	Functional Class / LaneType	Year Completed	Comments
Afonsoeiro, Setúbal Montijo Portugal	N4 (Circular Externa) / Avenida Garcia da Orta (38.70694, -8.94501)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Afonsoeiro, Setúbal Montijo Portugal	Circular Externa / Rua Antero de Quental (38.71345, -8.94616)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Afonsoeiro, Setúbal Montijo Portugal	Circular Externa / Rua das Naus (38.71601, -8.95715)	Roundabout Existing	All-Way Yield None	2 Approaches 2 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Jardia, Setúbal Montijo Portugal	N4 (Avenida Dom Manuel) / Rua das Forças Armadas / Rua Infante Dom Francisco (38.70686, -8.92771)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Shenandoah, TX Montgomery Co. United States	David Memorial Dr. / Shenandoah Park Dr. (30.19171, -95.44727)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 45.7200	Other (At-Grade) Multilane (2 Lane, unspecified)	2017	Right-turn-only markings in both lanes on all entries.
(unincorporated), TX Montgomery Co. United States	Woodforest Pkwy. / Woodforest Blvd. / Spyglass Park Ln. (30.27643, -95.55388)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 67.0560	Other (At-Grade) Single-Lane	2012	Year Completed estimated (2011-2012).
Darnestown, MD Montgomery Co. United States	Schaeffer Rd. / Germantown Park Dr. / Central Park Cir. (39.15003, -77.30152)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 48.7680	Other (At-Grade) Single-Lane	2004	Right-turn-only lane on northeast leg. Year Completed estimated (2002-2005).
Calverton, MD Montgomery Co. United States	Fairland Rd. / Brahms Ave. / (parking) (39.07126, -76.95403)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 50.2920	Other (At-Grade) Multilane (2 Lane, unspecified)	2008
Calverton, MD Montgomery Co. United States	Fairland Rd. / Marlow Farm Terr. / Musgrove Rd. (39.07004, -76.95264)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 35.0520	Other (At-Grade) Single-Lane	2008
Calverton, MD Montgomery Co. United States	Fairland Rd. / Galway Dr. (39.06594, -76.94436)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 32.0040	Other (At-Grade) Single-Lane	2008
Gaithersburg, MD Montgomery Co. United States	Washingtonian Blvd. / Rio Blvd. (39.11678, -77.20122)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Multilane (2 Lane, unspecified)	1998	Year Completed estimated (1993-2002).
Gaithersburg, MD Montgomery Co. United States	Washingtonian Blvd. / Washington Blvd. (39.11773, -77.20314)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 36.5760	Other (At-Grade) Multilane (2 Lane, unspecified)	1998	Year Completed estimated (1993-2002).
(unincorporated), TX Montgomery Co. United States	Northgrove Pkwy. / Hufsmith Conroe Rd. (30.14894, -95.59330)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 83.8200	Other (At-Grade) Multilane (2 Lane, unspecified)	2016
Montgomery, AL Montgomery Co. United States	Aum Dr. / Brown Springs Rd. (32.37307, -86.17992)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 45.7200	Other (At-Grade) Single-Lane	2012	Year Completed estimated (2011-2013).
Olney, MD Montgomery Co. United States	Old Baltimore Rd. / Bishops Castle Dr. (39.14878, -77.04958)	Traffic Calming Circle Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Unknown Single-Lane	2019	Painted splitter islands on major street; no splitter islands on side street.
Burtonsville, MD Montgomery Co. United States	Bentley Park Dr. / Saddle Creek Dr. (39.09674, -76.91863)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Wheaton-Glenmont, MD Montgomery Co. United States	Redspire Dr. / Tivoli Lake Blvd. (39.07315, -77.03208)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Wheaton-Glenmont, MD Montgomery Co. United States	Foggy Glen Dr. / Soaring Wing Ln. (39.08128, -77.02998)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Wheaton-Glenmont, MD Montgomery Co. United States	Poplar Run Dr. / Night Sky Dr. / Moonlight Trail Dr. (39.07862, -77.03729)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Potomac, MD Montgomery Co. United States	Brickyard Rd. / Hackamore Dr. (38.98567, -77.21274)	Traffic Calming Circle Existing	One-Way/Two-Way Stop Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Potomac, MD Montgomery Co. United States	Brickyard Rd. / Horseshoe Ln. (38.99291, -77.21195)	Traffic Calming Circle Existing	One-Way/Two-Way Stop Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Potomac, MD Montgomery Co. United States	Brickyard Rd. / Brent Rd. (38.99900, -77.22362)	Traffic Calming Circle Existing	One-Way/Two-Way Stop Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Montgomery, AL Montgomery Co. United States	Dexter Ave. / Commerce St. / S Court St. (32.37737, -86.30919)	Other Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 30.2597	Other (At-Grade) Single-Lane		Parking along the outer circle; sidewalk around the centtral island. ICD estimated from Google Maps linework.
McBryde, VA Montgomery Co. United States	Broce Dr. / Lora Ln. (37.23783, -80.43405)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 1 Driveways 20.9185	Other (At-Grade) Single-Lane	2008	ICD estimated from Google Maps linework.
Northside Park, VA Montgomery Co. United States	Givens Ln. / Northside Dr. (37.25358, -80.41898)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 33.2725	Other (At-Grade) Single-Lane	2012	ICD estimated from Google Maps linework.
Blacksburg, VA Montgomery Co. United States	Givens Ln. / Progress St. NW (37.25246, -80.42250)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 30.4210	Other (At-Grade) Single-Lane	2012	ICD estimated from Google Maps linework.
Blacksburg, VA Montgomery Co. United States	Edge Way / Orchard St. (37.23517, -80.42447)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 30.4280	Other (At-Grade) Single-Lane	2014	No splitter islands on three legs. ICD estimated from Google Maps linework.
Blacksburg, VA Montgomery Co. United States	Southgate Dr. / Duck Pond Dr. / Dairy Dr. (37.21647, -80.42360)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 33.2889	Other (At-Grade) Single-Lane	2016	ICD estimated from Google Maps linework.
Blacksburg, VA Montgomery Co. United States	Southgate Dr. / Research Center Dr. (37.21281, -80.42500)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 45.6555	Other (At-Grade) Single-Lane	2017	Through bypass lane on north leg. Right-turn bypass lane on south leg. ICD estimated from Google Maps linework.
Clarksburg, MD Montgomery Co. United States	Little Seneca Pkwy. / Snowden Farm Pkwy. (39.22989, -77.25280)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 28.6795	Other (At-Grade) Multilane (2 Lane, unspecified)	2012	Year Completed estimated (2011-2013). ICD estimated from Google Maps linework.
Clarksburg, MD Montgomery Co. United States	Snowden Farm Pkwy. / Winding Woods Way (39.22604, -77.24727)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 40.7086	Other (At-Grade) Multilane (2 Lane, unspecified)	2012	Year Completed estimated (2011-2013). ICD estimated from Google Maps linework.
Clarksburg, MD Montgomery Co. United States	Little Seneca Pkwy. / Meadow Mist Rd. (39.23154, -77.24309)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.5290	Other (At-Grade) Single-Lane	2011	ICD estimated from Google Maps linework.
Gaithersburg, MD Montgomery Co. United States	Victory Farm Dr. / Girard St. (39.14648, -77.18493)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 25.9348	Other (At-Grade) Multilane (2 Lane, unspecified)	2006	Year Completed estimated (2005-2006). ICD estimated from Google Maps linework.
Clarksburg, MD Montgomery Co. United States	Clarksburg Rd. (MD 121) / (outlet mall entrance) (39.22844, -77.28869)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 49.9588	Other (At-Grade) Multilane (2 Lane, unspecified)	2015	ICD estimated from Google Maps linework.
Clarksburg, MD Montgomery Co. United States	Clarksburg Rd. (MD 121) / Cabin Branch Ave. (39.22689, -77.29051)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 46.2592	Other (At-Grade) Multilane (2 Lane, unspecified)	2015	ICD estimated from Google Maps linework.
Bethesda, MD Montgomery Co. United States	Bradmoor Dr. / Roosevelt St. (38.99427, -77.11925)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 21.3360	Other (At-Grade) Single-Lane	2017	Year Completed estimated (2016-2018).
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.
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.
Blacksburg, VA Montgomery Co. United States	Washington St. / Campus Dr. / Stadium Rd. (37.22169, -80.42204)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 62.7690	Other (At-Grade) Single-Lane	2005	On the campus of Virginia Tech. ICD estimated from Google Maps linework.
Lower Frederick Township, PA Montgomery Co. United States	SR 29 (Gravel Pike) / SR 73 (Big Rd.) (40.27733, -75.48040)	Roundabout Existing	All-Way Yield None	3 Approaches 3 Driveways 46.4703	Other (At-Grade) Single-Lane	2008	Asphalt construction. Design for future multilane retrofit. Previously controlled by flashing beacon Functional Class: Principal Arterial ICD estimated from Google Maps linework.
Montgomery, AL Montgomery Co. United States	Washington Ave. / S. Bainbridge St. (32.37648, -86.30121)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 18.1560	Other (At-Grade) Single-Lane	2008	Opened July 2008. ICD estimated from Google Maps linework.
Montgomery, AL Montgomery Co. United States	S. Ripley St. / Washington Ave. (32.37658, -86.29808)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 14.1213	Other (At-Grade) Single-Lane	2008	Opened April 2008. ICD estimated from Google Maps linework.
Montgomery, AL Montgomery Co. United States	University Dr. / East Dr. / (parking lot) (32.36779, -86.17373)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 41.3593	Other (At-Grade) Single-Lane	2010	Entrance to Auburn University Montgomery (AUM). Year completed estimated (2008-2011). ICD estimated from Google Maps linework.
Miamisburg, OH Montgomery Co. United States	Austin W Blvd. / Automation Way (39.59850, -84.24378)	Roundabout Existing	All-Way Yield None	2 Approaches 0 Driveways 44.1728	Other (At-Grade) Single-Lane	2011	ICD estimated from Google Maps linework.
Kettering, OH Montgomery Co. United States	Forrer Blvd. / Madison St. (39.71565, -84.14854)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 51.4476	Other (At-Grade) Multilane (2 Lane, unspecified)	1996	ICD estimated from Google Maps linework.
Silver Spring, MD Montgomery Co. United States	Gist Ave. / Woodbury Dr. (38.98948, -77.02294)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Clarksville, TN Montgomery Co. United States	Needmore Rd. / N Whitfield Rd. (36.58403, -87.33613)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2024	https://clarksvillenow.com/local/rhonda-the-roundabout-has-public-debut-city-of-clarksville-adjusting-signage-signal-timing/
Magnolia, TX Montgomery Co. United States	Magnolia Ridge Blvd. / Jewett Meadow Dr. / Rogerdale River Dr. (30.21121, -95.73470)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (2 Lane, 2x1 max)
Gaithersburg, MD Montgomery Co. United States	Perry Pkwy. / (parking) (39.14899, -77.21048)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 47.2440	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2004	Year Completed estimated (2002-2005).
Redland, MD Montgomery Co. United States	Columbus Ave. / Gramercy Blvd. (39.12362, -77.16494)	Other Existing	All-Way Stop Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
King Farm, MD Montgomery Co. United States	Pleasant Circle (39.11623, -77.17518)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown		Pedestrian access to central island.
Potomac, MD Montgomery Co. United States	10600 Morning Field Dr. / Sunny Brooke Ln. / Sunny Brooke Pl. (39.07423, -77.21561)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Potomac, MD Montgomery Co. United States	Broad Green Dr. / Clagett Farm Dr. (39.04566, -77.19669)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Potomac, MD Montgomery Co. United States	Larkmeade Ln. / Bells Ridge Dr. (39.03483, -77.16775)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Derwood, MD Montgomery Co. United States	Achille Ln. / Heartwood Dr. (39.12925, -77.11543)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Derwood, MD Montgomery Co. United States	Heartwood Dr. (39.13239, -77.11434)	Other Existing	Unknown Unknown	2 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Derwood, MD Montgomery Co. United States	Coppelia Dr. / Toboggan Ln. (39.13566, -77.11938)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Olney, MD Montgomery Co. United States	Martins Dairy Cir. / Old Baltimore Rd. (39.13345, -77.07382)	Other Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Painted splitter islands.
Wheaton, MD Montgomery Co. United States	Park Vista Dr. / Wintergate Dr. / Longmeade Crossing Dr. (39.10755, -77.05340)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2020	Painted splitter islands added 2020.
Ashton, MD Montgomery Co. United States	Harbour Town Dr. / Grand Cypress Ct. (39.13205, -77.00407)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Woodbourne-Hyde Park, OH Montgomery Co. United States	Mad River Rd. / W Alex Bell Rd. (39.65510, -84.19420)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2022	https://www.whio.com/news/local/washington-twp-roundabout-set-open-within-next-week/JEWIGLMTEBBDXJ3PZ2QO3ILVQ4/
Montgomery, AL Montgomery Co. United States	Taylor Lakes Pkwy. / Towering Oaks Dr. (32.31210, -86.19300)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Montgomery, AL Montgomery Co. United States	Monument Park Dr. / Chastain Park Dr. / Morning Side Park Dr. (32.30911, -86.14268)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 44.1960	Other (At-Grade) Single-Lane	2010	Year Completed estimated (2008-2011).
Travilah, MD Montgomery Co. United States	Marwood Hill Dr. / Rivers Bend Ln. (39.03022, -77.23432)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane
Gaithersburg, MD Montgomery Co. United States	Upshire Circle (39.11353, -77.22397)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Olney, MD Montgomery Co. United States	Wickham Rd. / Broom Dr. (39.15708, -77.09362)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Olney, MD Montgomery Co. United States	Martins Dairy Cir. / Gooseneck Terrace (39.13176, -77.07439)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Germantown, MD Montgomery Co. United States	Milestone Manor Ln. / Manor View Cir. / Milestone Manor Ct. (39.20854, -77.24868)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Germantown, MD Montgomery Co. United States	Milestone Manor Ln. / Stardrift Dr. (39.20560, -77.25039)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Germantown, MD Montgomery Co. United States	Milestone Manor Ln. / Emerald Dr. (39.20479, -77.25262)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Germantown, MD Montgomery Co. United States	Milestone Manor Ln. / Royal Crown Dr. (39.20518, -77.25877)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Germantown, MD Montgomery Co. United States	Pickering Dr. / Pickering Pl. (39.18854, -77.27173)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Germantown, MD Montgomery Co. United States	Club Hill Dr. / Thackery Pl. (39.18531, -77.27012)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Germantown, MD Montgomery Co. United States	Kildale Hills Terrace / Galway Bay Cir. (39.17826, -77.27643)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Chevy Chase, MD Montgomery Co. United States	Rosemary Circle [Rosemary St. / Hillcrest Pl. / Stanford St.] (38.97789, -77.08055)	Other Existing	All-Way Stop Unknown	5 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Parking along circulatory roadway.
Mount Sterling, KY Montgomery Co. United States	Indian Mound Dr. / Spencer Pike (38.05454, -83.91678)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2022	Year Completed estimated (2021-2022).
New Florence, MO Montgomery Co. United States	MO 19 / Tree Farm Rd. / I-70 EB Ramps (38.89821, -91.45624)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Single-Lane	2023	https://www.modot.org/node/35298
New Florence, MO Montgomery Co. United States	MO 19 / Booneslick Rd. / I-70 WB Ramps (38.90090, -91.45707)	Roundabout Existing	All-Way Yield None	5 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Single-Lane	2023	https://www.modot.org/node/35298 Combined freeway interchange with at-grade intersection. Previously, the interchange was stop controlled and the intersection had traffic lights.
Conroe, TX Montgomery Co. United States	Harpers Way / Preserve Way (30.19869, -95.44163)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 28.9560	Other (At-Grade) Single-Lane	2022	Single-stage pedestrian crossings.
Conroe, TX Montgomery Co. United States	Preserve Way / Harpers Trace (30.19433, -95.42699)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 42.6720	Other (At-Grade) Single-Lane	2019	Year Completed estimated (2018-2019).
Conroe, TX Montgomery Co. United States	Preserve Way / Bayou Oaks Dr. (30.19425, -95.42220)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 38.1000	Other (At-Grade) Single-Lane	2021	Single-stage pedestrian crossings. Year Completed estimated (2020-2022).
Conroe, TX Montgomery Co. United States	Harpers Trace / Harpers School Rd. (30.20566, -95.42716)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 42.6720	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2015	Year Completed estimated (2015-2016).
Shenandoah, TX Montgomery Co. United States	Vision Park Blvd. / Grogans Mill Rd. (30.18988, -95.46596)	Roundabout Existing	All-Way Yield None	2 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2009	Right-turn-only arrows at entries.
Montgomery, TX Montgomery Co. United States	Noble Greens Blvd. / Bungalow Dr. (30.28008, -95.56863)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Montgomery, TX Montgomery Co. United States	Bonterra Blvd. / Mountain Laurel Dr. / S Claret Cup Ln. (30.28166, -95.54889)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 42.6720	Other (At-Grade) Single-Lane	2013	No truck apron. Year Completed estimated (2011-2015).
Montgomery, TX Montgomery Co. United States	Central Pine St. / Crest Sights Dr. (30.29200, -95.55637)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 47.2440	Other (At-Grade) Single-Lane	2020	No truck apron. Year Completed estimated (2020-2021).
Magnolia, TX Montgomery Co. United States	Cimarron Creek Blvd. / Tolby Creek Ln. / Winding Pass Ln. / Ute Creek Ln. (30.21509, -95.59255)	Roundabout Existing	All-Way Stop Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Magnolia, TX Montgomery Co. United States	Tall Oaks Way / W Border Oaks Dr. (30.21417, -95.66748)	Other Existing	Unknown Unknown	4 Approaches 1 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Magnolia, TX Montgomery Co. United States	Audubon Pkwy. / Audubon Trace (30.22075, -95.71643)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 73.1520	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2021	Year Completed estimated (2020-2022).
Clarksville, TN Montgomery Co. United States	Henry Place Blvd. / Bandera Dr. (36.60740, -87.38149)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2013
Limerick, PA Montgomery Co. United States	Swamp Pike / Lewis Rd. / W Arcadia Dr. (40.23457, -75.52624)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 44.1960	Other (At-Grade) Single-Lane	2020	https://patch.com/pennsylvania/limerick/swamp-pike-reopens-limerick-township
Silver Spring, MD Montgomery Co. United States	Woodmoor Dr. / Lexington Dr. (39.02215, -77.00818)	Other Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Potomac, MD Montgomery Co. United States	Old Seven Locks Rd. / Quarry Manor Terrace (38.99371, -77.16028)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Bethesda, MD Montgomery Co. United States	Boxwood Rd. / Spangler Ave. (38.94781, -77.10888)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
Bethesda, MD Montgomery Co. United States	Tournay Rd. / Spangler Ave. (38.94811, -77.11053)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.
(unincorporated), MD Montgomery Co. United States	Travilah Rd. / Turkey Foot Rd. / Hanson Farm Dr. (39.07993, -77.25560)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 33.5280	Other (At-Grade) Single-Lane	2020	Painted splitter islands. Year Completed estimated (2019-2020).
Germantown, MD Montgomery Co. United States	Crossview Rd. / Autumn Crest Rd. (39.16717, -77.30075)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands.