City,
State County Country |
Intersection (Lat, Lng) |
Type Status |
Control Type / Other Control Type | Approaches / Driveways / ICD (m) |
Functional Class / LaneType |
Year Completed | Comments |
---|---|---|---|---|---|---|---|
Hillsboro,
VA Loudoun Co. United States |
Charles Town Pike (Rte 9) / Stony Point Rd. (39.20016, -77.72763) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 1 Driveways 0.0000 |
Other (At-Grade) Single-Lane |
2021 | https://www.washingtonpost.com/transportation/2021/07/23/virginia-hillsboro-walkable-roads-loudoun/ |
Columbia,
MD Howard Co. United States |
Stevens Forest Rd. / Farewell Rd. / Night Street Hill (39.20114, -76.84781) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 27.4320 |
Other (At-Grade) Single-lane w/ Traversable Central Island |
2019 | |
Manhattan,
KS Riley Co. United States |
Kimball Ave. / Grand Mere Pkwy. (39.20168, -96.63786) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 32.3931 |
Other (At-Grade) Single-Lane |
2000 | Completed 3/2000. Built as part of new Colbert Hills Golf Course. Fatal crash January 31, 2010. 11861-05. Functional Class: Collector ICD estimated from Google Maps linework. |
Cagliari,
Sardinia Cagliari Italy |
Viale Poetto / Via Campioni d'Italia 1969-70 / Via Amerigo Vespucci / Viale San Bartolomeo (39.20178, 9.14142) |
Roundabout Existing |
All-Way Yield Unknown |
3 Approaches 0 Driveways |
Unknown Multilane (2 Lane, 2x1 max) |
Via Amerigo Vespucci is one-way entering; Viale San Bartolomeo is one-way exiting. | |
Winchester,
VA Frederick Co. United States |
Campus Blvd. / SR 37 SB Ramps (39.20215, -78.19348) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 41.1480 |
Freeway Ramps (Grade-Separated) Single-Lane |
2015 | Right-turn merging bypass lane on east leg. Truck apron much wider than circulatory roadway. Year Completed estimated (2013-2017). |
Parkville,
MO Platte Co. United States |
N Nevada Ave. / Thousand Oaks Pl. (39.20318, -94.74726) |
Other Existing |
Unknown Unknown |
4 Approaches 0 Driveways 0.0000 |
Other (At-Grade) Single-Lane |
||
Germantown,
MD Montgomery Co. United States |
Crystal Rock Dr. / Century Blvd. (39.20326, -77.27356) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 48.7680 |
Other (At-Grade) Multilane (2 Lane, 2x2 max) |
2015 | Striping added 2019-2021. Inconsistent lane use markings between entry and circulatory roadway. |
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 |
||
Cagliari,
Sardinia Cagliari Italy |
Viale Armando Diaz / Via Campioni d'Italia 1969-70 / Via dei Salinieri / Via Generale Stefano Cagna / Via della Pineta (39.20491, 9.13802) |
Roundabout Existing |
All-Way Yield Unknown |
5 Approaches 0 Driveways |
Other (At-Grade) Multilane (2 Lane, 2x1 max) |
||
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. |
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 |
||
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. / Stardrift Dr. (39.20560, -77.25039) |
Other Existing |
Unknown Unknown |
4 Approaches 0 Driveways 0.0000 |
Other (At-Grade) Unknown |
||
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. |
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. |
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 | |
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 |
||
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 |
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. |
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. |
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 |
||
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. | |
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. |
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. |
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. |
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 |
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. |
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 | |
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 |
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. |
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. | |
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 |
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). |
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). |
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. | |
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. |
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). |
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. |
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. |
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. |
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 | |
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) |
||
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. |
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. |
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. |
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. |
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 |
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. |
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. |
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 |
||
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. |
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 | |
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. |
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. |
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/ |
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) |
||
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 | |
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 |
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 |
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. |
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 | |
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 |
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. |
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 |
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. |
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) / (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. |
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 | |
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 |
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). |
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. |
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) |
||
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 |
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. |
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. |
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 |
||
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. |
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. |
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. |
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. / 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. |
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. |
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. | |
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) |
||
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. |
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. |
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. |
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. |
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 | |
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 |
||
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. |
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 | |
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). |
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 | |
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 |
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). |
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 |
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 |
||
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. |
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 |