Roundabouts Database

29410 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
Kansas City, MO
Platte Co.
United States 		N Serene Ave. / NW Prairie View Rd.
(39.25268, -94.66677) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
29.5950 		Other (At-Grade)
Single-Lane 		2005 ICD estimated from Google Maps linework.
Monserrato, Sardinia
Cagliari
Italy 		Via Riu Mortu / Via Cesare Cabras / Viale Trieste / Via Giuseppe Zuddas
(39.25227, 9.14655) 		Other
Existing 		Other
Unknown 		5 Approaches
0 Driveways
 Other (At-Grade)
Multilane (2 Lane, 2x2 max) 		Mix of stop and yield control on entry.
Catonsville, MD
Baltimore Co.
United States 		Hilltop Cir. / UMBC Blvd.
(39.25178, -76.71442) 		Rotary
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
60.1156 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2015 Lane changes needed for some through movements. ICD estimated from Google Maps linework.
Blue Ash, OH
Hamilton Co.
United States 		Glendale Milford Rd. / Lake Forest Dr. / Summit Pl.
(39.25169, -84.38466) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
50.8671 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2019 ICD estimated from Google Maps linework.
Incline Village, NV
Washoe Co.
United States 		SR 28 (Tahoe Blvd.) / SR 431 (Mt Rose Hwy.)
(39.25146, -119.97321) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
39.7690 		Other (At-Grade)
Single-Lane 		2012 Reduced from two entering lanes (LT only, TH only) on west leg to one lane in 2015-2016. Now single-lane roundabout. ICD estimated from Google Maps linework.
Selargius, Sardinia
Cagliari
Italy 		Via Giuseppe Peretti / Via Araolla / Piazzale Alessandro Ricchi
(39.25098, 9.10911) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
 Other (At-Grade)
Multilane (2 Lane, 2x2 max)
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 		Academy Rd. / Hillsborough Rd. / Chews Vineyard
(39.24993, -76.78913) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
West Friendship, MD
Howard Co.
United States 		Folly Quarter Rd. / Sheppard Ln. / Homewood Rd.
(39.24979, -76.93188) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
33.5280 		Other (At-Grade)
Single-Lane 		2004 Year Completed estimated (2002-2005).
Cagliari, Sardinia
Cagliari
Italy 		Via Giuseppe Peretti / Via Stamira / SS131dir (Circonvallazione Quadrifoglio) Ramps
(39.24951, 9.11493) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
 Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified)
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
Catonsville, MD
Baltimore Co.
United States 		UMBC Blvd. / Research Park Dr.
(39.24874, -76.71580) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
44.3950 		Other (At-Grade)
Single-Lane 		2015 Elliptical shape. ICD estimated from Google Maps linework.
Catonsville, MD
Baltimore Co.
United States 		Research Park Dr.
(39.24868, -76.71406) 		Other
Existing 		Uncontrolled
Unknown 		2 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Montgomery, OH
Hamilton Co.
United States 		Pfeiffer Rd. / Deerfield Rd.
(39.24866, -84.35092) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		2023 https://www.facebook.com/story.php/?story_fbid=602452425250045&id=100064558789263
Kansas City, MO
Clay Co.
United States 		N Sycamore Ave. / N 85th Terr. / Shoal Creek Valley Dr.
(39.24733, -94.48586) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
60.9600 		Other (At-Grade)
Single-Lane 		2002 No truck apron. Year Completed estimated (1997-2003).
Quartucciu, Sardinia
Cagliari
Italy 		Via delle Serre / Via Segre
(39.24684, 9.16501) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
 Other (At-Grade)
Multilane (2 Lane, 2x1 max)
Kansas City, MO
Clay Co.
United States 		NE Shoal Creek Valley Dr. / (unknown)
(39.24673, -94.47459) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2020
Liberty, MO
Clay Co.
United States 		N Stewart Rd. / College St. / Conistor Ln. / (parking)
(39.24629, -94.45100) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2002 Year Completed estimated (1997-2003).
Liberty, MO
Clay Co.
United States 		College St. / N Blue Jay Dr.
(39.24628, -94.44898) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2005
Kansas City, MO
Clay Co.
United States 		N Booth Ave. / NE Shoal Creek Valley Dr. / Commercial Dr.
(39.24626, -94.47674) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
44.1960 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2020 Yield-controlled right-turn bypass lane on west leg. Year Completed estimated (2020-20210.
Ellicott City, MD
Howard Co.
United States 		Nightingale Ct. / Academy Rd.
(39.24564, -76.79297) 		Other
Existing 		Unknown
Unknown 		2 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown
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
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.
Liberty, MO
Clay Co.
United States 		S Stewart Rd. / (parking)
(39.24344, -94.45337) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
33.5277 		Other (At-Grade)
Single-Lane 		2016 Add-lane right-turn bypass lane on south leg.
Blue Ash, OH
Hamilton Co.
United States 		Plainfield Rd. / Parkview Dr.
(39.24335, -84.39561) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
18.4993 		Other (At-Grade)
Single-Lane 		2018 http://www.blueash.com/departments/public_works/roundabout_safety.php ICD estimated from Google Maps linework.
Kansas City, MO
Clay Co.
United States 		NE 82nd Terr. / N Booth Ave.
(39.24250, -94.47752) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
53.3400 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2008 South leg stubbed.
Cagliari, Sardinia
Cagliari
Italy 		Via Edward Jenner / (connector to SS131dir)
(39.24238, 9.11694) 		Other
Existing 		All-Way Stop
Unknown 		3 Approaches
0 Driveways
 Other (At-Grade)
Multilane (2 Lane, unspecified)
Clarksburg, MD
Montgomery Co.
United States 		Granite Rock Rd. / Grand Elm St.
(39.24126, -77.26647) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Blue Ash, OH
Hamilton Co.
United States 		Malsbary Rd. / Alliance Rd.
(39.23916, -84.38188) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
34.2258 		Other (At-Grade)
Single-Lane 		2017 http://www.blueash.com/departments/public_works/roundabout_safety.php ICD estimated from Google Maps linework.
Kings Beach, CA
Placer Co.
United States 		N Lake Blvd. / Bear Ave. / Brook Ave. / (beach parking)
(39.23681, -120.02465) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
24.0514 		Other (At-Grade)
Single-Lane 		2014 ICD estimated from Google Maps linework.
Clarksburg, MD
Montgomery Co.
United States 		Saint Clair Rd. / Timber Creek Ln. / Brewers Tavern Terrace / (unknown)
(39.23680, -77.27531) 		Other
Existing 		Unknown
Unknown 		5 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Kings Beach, CA
Placer Co.
United States 		N Lake Blvd. / Coon St.
(39.23589, -120.02207) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
29.6021 		Other (At-Grade)
Single-Lane 		2014 ICD estimated from Google Maps linework.
Grass Valley, CA
Nevada Co.
United States 		Sierra College Dr. / Litton Dr. / Robert Ross Way
(39.23445, -121.05200) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
32.3780 		Other (At-Grade)
Single-Lane 		2003 ICD estimated from Google Maps linework.
Grass Valley, CA
Nevada Co.
United States 		Olympia Park Cir. / (parking lot)
(39.23248, -121.03766) 		Roundabout
Existing 		All-Way Yield
None 		2 Approaches
1 Driveways
22.8600 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2014 All paint, no raised islands. Opened November 2014. Previously, Olympia Park Circle made a gentle 90-degree curve. Traffic entering from stop-controlled driveway had trouble making left turn as they had to proceed 60 feet to reach the safety of centerline without knowing if approaching vehicle on their left was going to enter the driveway or curve left in front of them. Now about 50% of driveway exits cheat across the central island, but it works just fine. After six years with no raised islands, a central island was built on 3 Nov 2020: 20 feet in diameter, 4 inches high, designed for asphalt but built with PCC.
Clarksville, MD
Howard Co.
United States 		Northern Bell Way / Bee Frances Way / Catherine Close Rd.
(39.23232, -76.97091) 		Other
Existing 		Unknown
Unknown 		3 Approaches
1 Driveways
0.0000 		Other (At-Grade)
Single-Lane
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.
Kansas City, MO
Clay Co.
United States 		NE Flintlock Rd / NE 76th St
(39.23094, -94.47007) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
57.3581 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2013 ICD estimated from Google Maps linework.
Blue Ash, OH
Hamilton Co.
United States 		Plainfield Rd. / Peppermill Ln. / Reed-Hartman Hwy.
(39.23083, -84.39482) 		Roundabout
Existing 		All-Way Yield
Rectangular Rapid Flashing Beacon (RRFB) 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2023 RRFB on all four legs. https://www.blueash.com/departments/public_works/hunt_plainfield.php
Quartu Sant’Elena, Sardinia
Cagliari
Italy 		SP17 / SP17ter / Viale Europa / Via Flume
(39.23079, 9.22086) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
 Other (At-Grade)
Multilane (2 Lane, 2x2 max)
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.
Clarksville, MD
Howard Co.
United States 		Linden Church Rd. / MD 32 NB Ramps
(39.22942, -76.97263) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
39.6240 		Freeway Ramps (Grade-Separated)
Single-Lane 		2013 Year Completed estimated (2011-2014).
Clarksville, MD
Howard Co.
United States 		Watkins Bridge Ln. / Holly Creek Ln.
(39.22939, -76.94583) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
30.4800 		Other (At-Grade)
Single-Lane 		2010
Clarksville, MD
Howard Co.
United States 		Preakness Circle Ln. / Watkins Bridge Ln.
(39.22880, -76.94308) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
1 Driveways
30.4800 		Other (At-Grade)
Single-Lane 		2010
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.
Blue Ash, OH
Hamilton Co.
United States 		Hunt Rd. / Plainfield Rd.
(39.22691, -84.39426) 		Roundabout
Existing 		All-Way Yield
Rectangular Rapid Flashing Beacon (RRFB) 		4 Approaches
0 Driveways
53.0352 		Other (At-Grade)
Multilane (2 Lane, 2x2 max) 		2023 https://www.wcpo.com/news/local-news/hamilton-county/blue-ash/blue-ash-police-new-roundabout-while-confusing-some-is-reducing-crashes
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.
Clarksville, MD
Howard Co.
United States 		Running Fence Ln. / Preakness Circle Ln.
(39.22640, -76.94374) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
30.4800 		Other (At-Grade)
Single-Lane 		2010
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.
Blue Ash, OH
Hamilton Co.
United States 		Hunt Rd. / (parking)
(39.22578, -84.39828) 		Roundabout
Existing 		All-Way Yield
Rectangular Rapid Flashing Beacon (RRFB) 		3 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2022 Opened February 2, 2022. https://www.blueash.com/departments/public_works/hunt_plainfield.php
Snowmass Village, CO
Pitkin Co.
United States 		Brush Creek Rd. / Highline Rd.
(39.22541, -106.92049) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
1 Driveways
38.1000 		Other (At-Grade)
Single-Lane 		2006
Kansas City, MO
Platte Co.
United States 		MO-45 (Tom Watson Pkwy.) / NW Brink-Myer Rd.
(39.22507, -94.75656) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
45.3352 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2017 ICD estimated from Google Maps linework.
Kansas City, MO
Platte Co.
United States 		NW 72nd St. / NW Waukomis Dr. / N Green Hills Rd.
(39.22505, -94.62750) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
34.2327 		Other (At-Grade)
Single-Lane 		2012 Streetview car went through just after completion while two approaches were still blocked off. ICD estimated from Google Maps linework.
Kansas City, MO
Platte Co.
United States 		NW 72nd St. / N Overland Dr.
(39.22495, -94.64044) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		2020 https://www.kcmo.gov/Home/Components/FacilityDirectory/FacilityDirectory/53/360?npage=2
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
Quartu Sant’Elena, Sardinia
Cagliari
Italy 		Viale Lungomare del Golfo / Viale Cristoforo Colombo / (parking)
(39.22372, 9.19555) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
1 Driveways
 Other (At-Grade)
Multilane (2 Lane, 2x1 max)
Montgomery, OH
Hamilton Co.
United States 		US 22 (Montgomery Rd.) / SR 126 (Ronald Reagan Cross Country Hwy.)
(39.22308, -84.35643) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Multilane (3+ Lane) 		2021 Previously a grade-separated freeway interchange. https://m.facebook.com/CityofMontgomeryOhio/videos/352303629903240/
Stephenson, VA
Frederick Co.
United States 		Northumberland Dr. / Churndash Way / Patchwork Dr.
(39.22289, -78.09317) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2017 No pavement markings or splitter islands as of October 2017.
Liberty, MO
Clay Co.
United States 		Liberty Dr / Flintrock Rd
(39.22231, -94.46337) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
40.7108 		Other (At-Grade)
Single-Lane 		2013 ICD estimated from Google Maps linework.
Kansas City, MO
Clay Co.
United States 		Searcy Creek Pkwy. / NE Shoal Creek Pkwy.
(39.22229, -94.50338) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
77.7240 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2008
Grass Valley, CA
Nevada Co.
United States 		E. Main St. / Idaho-Maryland Rd. / SR 20 WB Ramps
(39.22168, -121.05380) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
39.6240 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2008 Yield-controlled right-turn bypass lane on north leg with very shallow angle. Left-turn-only lane on east leg.
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
Clarksburg, MD
Montgomery Co.
United States 		Cabin Branch Ave. / Skimmer St.
(39.22020, -77.28435) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
45.7200 		Other (At-Grade)
Multilane (2 Lane, 2x2 max) 		2016 Year Completed estimated (2015-2017). Striping added 2019-2021.
Kansas City, MO
Platte Co.
United States 		MO-45 (Tom Watson Pkwy.) / NW Union Chapel Rd. (MO K)
(39.21999, -94.73524) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
55.5165 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2010 ICD estimated from Google Maps linework.
Chestertown, MD
Kent Co.
United States 		MD 20 / MD 291 / (parking lot)
(39.21863, -76.07913) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
47.1899 		Other (At-Grade)
Single-Lane 		2015 ICD estimated from Google Maps linework.
Kansas City, MO
Platte Co.
United States 		NW Union Chapel Rd. / NW Brink-Meyer Rd.
(39.21830, -94.73579) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
28.6842 		Other (At-Grade)
Single-Lane 		2011 ICD estimated from Google Maps linework.
Clarksburg, MD
Montgomery Co.
United States 		Little Seneca Pkwy. / Cabin Branch Ave.
(39.21654, -77.28310) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
45.7200 		Other (At-Grade)
Multilane (2 Lane, 2x2 max) 		2016 Year Completed estimated (2016-2017). Striping added 2019-2021.
Clarksburg, MD
Montgomery Co.
United States 		Broadway Ave. / Little Seneca Pkwy.
(39.21646, -77.28540) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
45.7200 		Other (At-Grade)
Multilane (2 Lane, 2x2 max) 		2016 Year Completed estimated (2015-2017). Striping added 2019-2021.
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.
Cagliari, Sardinia
Cagliari
Italy 		Via Lungo Saline / Via dell'Idrovora
(39.21551, 9.17084) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
 Other (At-Grade)
Multilane (2 Lane, 2x1 max)
Clarksville, MD
Howard Co.
United States 		Highland Rd. / Triadelphia Mill Rd.
(39.21551, -76.97698) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2008
Sycamore Township, OH
Hamilton Co.
United States 		Plainfield Rd. / Sycamore Rd.
(39.21534, -84.39192) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
37.9388 		Other (At-Grade)
Single-Lane 		2019 ICD estimated from Google Maps linework.
Columbia, MD
Howard Co.
United States 		Harpers Farm Rd. / Campus Dr.
(39.21534, -76.88023) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
31.4614 		Other (At-Grade)
Single-Lane 		2003 Originally had 4 legs. ICD estimated from Google Maps linework.
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.
Clarksburg, MD
Montgomery Co.
United States 		Clarksburg Rd. / W Old Baltimore Rd.
(39.21396, -77.29731) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
42.6720 		Other (At-Grade)
Single-Lane 		2019 Year Completed estimated (2019-2020).
Gladstone, MO
Clay Co.
United States 		NE Antioch Rd. / NE Pleasant Valley Rd.
(39.21369, -94.53468) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
34.2382 		Other (At-Grade)
Single-Lane 		2018 https://www.linecreekloudmouth.com/blog/street-improvements/ ICD estimated from Google Maps linework.
Parkville, MO
Platte Co.
United States 		National Dr. / Ridge Rd.
(39.21333, -94.70781) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
49.9696 		Other (At-Grade)
Single-Lane 		Functional Class: Local ICD estimated from Google Maps linework.
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).
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).
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.
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.
Elkridge, MD
Howard Co.
United States 		Elkridge Crossing Way / Doctor Patel Dr.
(39.21091, -76.72512) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
31.4634 		Other (At-Grade)
Single-Lane 		2007 East leg stubbed for future. ICD estimated from Google Maps linework.
Manhattan, KS
Riley Co.
United States 		Gary Ave. / Candlewood Dr.
(39.21087, -96.61885) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
21.2841 		Other (At-Grade)
Single-Lane 		1997 Considered to be the First Modern Roundabout in the State of Kansas. Previously controlled by two-way stop Functional Class: Collector ICD estimated from Google Maps linework.
Elkridge, MD
Howard Co.
United States 		Toomey Ln. / Fairlee Rd.
(39.21083, -76.71160) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
2 Driveways
27.4320 		Other (At-Grade)
Single-Lane 		2002
Snowmass Village, CO
Pitkin Co.
United States 		Brush Creek Rd. / Wood Rd. / Kearns Rd.
(39.21053, -106.94725) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
27.7620 		Other (At-Grade)
Single-Lane 		2016 Right-turn bypass lane on south leg. ICD estimated from Google Maps linework.
Parkville, MO
Platte Co.
United States 		MO 45 (Tom Watson Pkwy.) / National Dr.
(39.21016, -94.70027) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
48.1210 		Other (At-Grade)
Single-Lane 		2000 Functional Class: Arterial ICD estimated from Google Maps linework.
Snowmass Village, CO
Pitkin Co.
United States 		Wood Rd. / Carriage Way
(39.21000, -106.94756) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
40.7179 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2016 ICD estimated from Google Maps linework.
Kansas City, MO
Platte Co.
United States 		Lewis St. / (parking access)
(39.20966, -94.68484) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
21.2845 		Other (At-Grade)
Single-Lane 		2005 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.
Elkridge, MD
Howard Co.
United States 		Toomey Ln. / Clements Ln.
(39.20950, -76.71291) 		Other
Existing 		Unknown
Unknown 		2 Approaches
4 Driveways
0.0000 		Other (At-Grade)
Unknown 		No splitter islands.
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
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.
Columbus, IN
Bartholomew Co.
United States 		11th St. / Lindsey St. / Brown St.
(39.20836, -85.92443) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
44.4206 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2008 At-grade rail crossing on west leg (flashers, no gates). ICD estimated from Google Maps linework.
Kansas City, MO
Platte Co.
United States 		NW 62nd Terrace / NW Prairie View Rd. / N Chatham Ave.
(39.20831, -94.64319) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
48.7680 		Freeway Ramps (Grade-Separated)
Single-Lane 		2021 https://www.kcmo.gov/Home/Components/FacilityDirectory/FacilityDirectory/95/360
Kansas City, MO
Platte Co.
United States 		N Nevada Ave. / NW 62nd Pl.
(39.20830, -94.74611) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
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 		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.
Claycomo, MO
Clay Co.
United States 		Ford Motor Plant No 4 Rd. / (parking)
(39.20602, -94.47845) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
45.7200 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2013 Year Completed estimated (2012-2013). Reconfiguration of factory entrance and parking circulation.
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
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
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