Roundabouts Database Index

29411 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
Highlands/Perkins, LA East Baton Rouge Par. United States	L'Auberge Ave. / River Rd. (east) (30.34668, -91.14825)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 53.5957	Other (At-Grade) Single-Lane	2011	ICD estimated from Google Maps linework.
Burlington, IA Des Moines Co. United States	West Ave. / W Burlington Ave. (40.80061, -91.15269)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 37.0678	Other (At-Grade) Single-Lane	2017	Merging right-turn bypass lane on east leg. ICD estimated from Google Maps linework.
Highlands/Perkins, LA East Baton Rouge Par. United States	L'Auberge Ave. / River Rd. (west) (30.34725, -91.15325)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 1 Driveways 53.5954	Other (At-Grade) Single-Lane	2011	ICD estimated from Google Maps linework.
Warrenton, MO Warren Co. United States	W Veterans Memorial Pkwy / Booneslick Rd. (38.81902, -91.16957)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 37.2215	Other (At-Grade) Single-Lane	2018	ICD estimated from Google Maps linework.
Baton Rouge, LA East Baton Rouge Par. United States	Dalrymple Dr. / Isaac Cline Dr. / W Lakeshore Dr. (30.41647, -91.17170)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 24.7188	Other (At-Grade) Single-Lane	2013	ICD estimated from Google Maps linework.
Warrenton, MO Warren Co. United States	Laguna Linda Ln. / I-70 WB Ramps (38.82099, -91.17761)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 43.7340	Freeway Ramps (Grade-Separated) Single-Lane	2018	ICD estimated from Google Maps linework.
Warrenton, MO Warren Co. United States	Laguna Linda Ln. / W Veterans Memorial Pkwy. / I-70 EB Ramps (38.81933, -91.17764)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 40.9435	Freeway Ramps (Grade-Separated) Single-Lane	2018	Elliptical shape. ICD estimated from Google Maps linework.
Baton Rouge, LA East Baton Rouge Par. United States	N Stadium Rd. / Field House Dr. (30.41398, -91.18246)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2006	On campus of Louisiana State University.
Baton Rouge, LA East Baton Rouge Par. United States	Capitol Access Rd. / Capitol Lake Dr. (30.45808, -91.18278)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 38.1000	Other (At-Grade) Single-Lane	2016
Bowling Green, MO Pike Co. United States	US 61 Business / Sharry St. / Town Center Dr. / (unknown) (39.33272, -91.18290)	Roundabout Existing	All-Way Yield None	5 Approaches 0 Driveways 57.2748	Other (At-Grade) Single-Lane	2009	Year Completed estimated (2007-2009). ICD estimated from Google Maps linework.
Baton Rouge, LA East Baton Rouge Par. United States	Capitol Lake Rd. / Capitol Access Rd. (30.45818, -91.18621)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 38.1000	Other (At-Grade) Single-Lane	2016
Bowling Green, MO Pike Co. United States	US 61 Business / MO 161 / Court St (39.33344, -91.19504)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 45.7200	Other (At-Grade) Single-Lane	2022	https://www.modot.org/roundabout-bowling-green
La Crosse, WI La Crosse Co. United States	STH 35 / Sunnyside Rd. (43.74798, -91.20032)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 41.1480	Other (At-Grade) Single-Lane	2022	https://www.wizmnews.com/2022/04/06/100-people-show-to-meeting-on-wisconsin-dots-hwy-35-roundabout-plan-in-la-crosse/
La Crosse, WI La Crosse Co. United States	US 14-US 61 / STH 35 (43.75183, -91.20088)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown	2022	https://www.news8000.com/construction-wrapping-up-on-roundabout-in-southern-la-crosse-road-fully-opens/
Onalaska, WI La Crosse Co. United States	E Main St. / Green Coulee Rd. (43.88407, -91.20926)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (2 Lane, unspecified)	2021	https://www.news8000.com/new-two-lane-roundabout-opens-in-onalaska/
Baker/Zachary Area, LA East Baton Rouge Par. United States	Mt Pleasant-Zachary Rd. / Americana Blvd. (30.65121, -91.21301)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 53.4282	Other (At-Grade) Multilane (2 Lane, unspecified)	2015	date: https://www.theadvocate.com/baton_rouge/news/communities/zachary/article_1ecf0c49-f41b-581b-8a13-8b434793f15e.html ICD estimated from Google Maps linework.
Onalaska, WI La Crosse Co. United States	Sand Lake Rd. / Riders Club Rd. (43.90548, -91.22078)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 50.7692	Other (At-Grade) Single-Lane	2011	ICD estimated from Google Maps linework.
La Crosse, WI La Crosse Co. United States	Farnam St. / 20th St. S (43.79786, -91.22690)	Traffic Calming Circle Existing	Other Unknown	4 Approaches 0 Driveways 12.0687	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
La Crosse, WI La Crosse Co. United States	King St. / 19th St. S (43.81013, -91.22819)	Traffic Calming Circle Existing	Other Unknown	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
La Crosse, WI La Crosse Co. United States	US 14-US 61 (South Ave.) / Ward Ave. / East Ave. S (43.78321, -91.22927)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2023	https://lacrossetribune.com/news/local/new-south-avenue-roundabouts-open-as-17m-reconstruction-project-wraps-up-in-la-crosse/article_9285b35e-87d1-11ee-82a8-4b70d01b1787.html
La Crosse, WI La Crosse Co. United States	US 14-US 61 (South Ave.) / 16th St. S / Castle Pl. (43.78518, -91.23212)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown	2023	https://lacrossetribune.com/news/local/new-south-avenue-roundabouts-open-as-17m-reconstruction-project-wraps-up-in-la-crosse/article_9285b35e-87d1-11ee-82a8-4b70d01b1787.html
Onalaska, WI La Crosse Co. United States	Sand Lake Rd. / County Hwy OT (43.92355, -91.23538)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways	Other (At-Grade) Single-Lane	2019
La Crosse, WI La Crosse Co. United States	US 14-US 61 (South Ave.) / West Ave. / Weston St. (43.79077, -91.24001)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown	2023	https://lacrossetribune.com/news/local/new-south-avenue-roundabouts-open-as-17m-reconstruction-project-wraps-up-in-la-crosse/article_9285b35e-87d1-11ee-82a8-4b70d01b1787.html
Onalaska, WI La Crosse Co. United States	STH 35 / Riders Club Rd. / Sunset Vista Rd. (43.90711, -91.24497)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 43.0236	Other (At-Grade) Single-Lane	2016	ICD estimated from Google Maps linework.
Onalaska, WI La Crosse Co. United States	STH 35 / Mason St. (43.90999, -91.24578)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 41.3007	Other (At-Grade) Single-Lane	2016	ICD estimated from Google Maps linework.
La Crosse, WI La Crosse Co. United States	Cass St / 7th St. S (43.80876, -91.24707)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 44.8184	Other (At-Grade) Single-Lane	2017	ICD estimated from Google Maps linework.
Holmen, WI La Crosse Co. United States	S Main St. / Gaarder Rd. (43.95575, -91.25784)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 51.8160	Other (At-Grade) Single-Lane	2020	Elliptical shaped. ICD = 170 ft x 150 ft. Previous Control Type was stop-controlled on north, east, and south legs and uncontrolled on west leg. https://www.facebook.com/VillageofHolmen/posts/the-welcome-to-holmen-monument-and-the-new-maingaarder-roundabout-was-officially/1734935679978065/
Holmen, WI La Crosse Co. United States	McHugh Rd. / Briggs Rd. (43.97023, -91.28046)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2023	https://www.wxow.com/news/holmen-roundabout-construction-complete/article_3c823e00-36e1-11ee-8b3f-5b98b9378dcb.html
Lafayette, WI Chippewa Co. United States	CTH X / CR J (44.92409, -91.32223)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 33.8254	Other (At-Grade) Single-Lane	2013	Year Completed estimated (2011-2014). ICD estimated from Google Maps linework.
Chippewa Falls, WI Chippewa Co. United States	Parkland Dr. / Wissota Green Blvd. (44.95308, -91.35039)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 28.7371	Other (At-Grade) Single-Lane	2006	Functional Class: Local ICD estimated from Google Maps linework.
Chippewa Falls, WI Chippewa Co. United States	Parkland Dr. / Cottage Ln. (44.95369, -91.35110)	Traffic Calming Circle Existing	All-Way Yield None	3 Approaches 0 Driveways 22.8600	Other (At-Grade) Single-Lane	2006	ICD estimated from Google Earth.
Chippewa Falls, WI Chippewa Co. United States	STH 178 / CTH S (44.96615, -91.36333)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 37.1807	Other (At-Grade) Single-Lane	2009	Right turn bypass lanes on two corners. Opened October 2009. ICD estimated from Google Maps linework.
West Branch, IA Cedar Co. United States	W Main St / Herbert Hoover Hwy / Johnson Cedar Rd. NE (41.67115, -91.36629)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 45.7200	Other (At-Grade) Single-Lane	2023	On boundary between Cedar County and Johnson County and on western city limit of West Branch, IA. South leg is gravel road. https://www.anderson-bogert.com/projects/herbert-hoover-highway-and-johnson-cedar-road-roundabout/
Chippewa Falls, WI Chippewa Co. United States	Chippewa Crossing Blvd. / Alexander St. (44.92215, -91.37238)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 47.3572	Other (At-Grade) Multilane (2 Lane, unspecified)	2010	ICD estimated from Google Maps linework.
Chippewa Falls, WI Chippewa Co. United States	STH 124 / STH 29 (44.92093, -91.38065)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 54.9694	Other (At-Grade) Multilane (2 Lane, unspecified)	2009	Right-turn bypass lanes on all three legs. ICD estimated from Google Maps linework.
Chippewa Falls, WI Chippewa Co. United States	STH 124 / CTH S (44.96735, -91.38851)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 44.7849	Other (At-Grade) Single-Lane	2005	Opened October 2005. ICD estimated from Google Maps linework.
Chippewa Falls, WI Chippewa Co. United States	STH 124 / BUS 29 (44.93498, -91.39065)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 35.5100	Other (At-Grade) Multilane (2 Lane, unspecified)	2009	Opened October 2009. ICD estimated from Google Maps linework.
Chippewa Falls, WI Chippewa Co. United States	CTH S / CTH Q (44.96605, -91.40759)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020	https://www.youtube.com/watch?v=1HzMVyhNqWY
Altoona, WI Eau Claire Co. United States	Baumbach Way / Hong St. (44.79151, -91.41359)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2021
Eau Claire, WI Eau Claire Co. United States	STH 53 / Old Town Hall Rd. / Scully Rd. (44.76384, -91.41872)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 47.4875	Other (At-Grade) Multilane (2 Lane, unspecified)	2008	Opened October 2008. ICD estimated from Google Maps linework.
Mount Vernon, IA Linn Co. United States	US-30 SE / IA-1(1st Ave S) (41.91563, -91.42243)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 186.6343	Other (At-Grade) Multilane (2 Lane, unspecified)	2013	ICD estimated from Google Maps linework.
Mount Vernon, IA Linn Co. United States	US-30 E / 10th Ave S (41.91643, -91.42947)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 40.8813	Other (At-Grade) Single-Lane	2013	ICD estimated from Google Maps linework.
Iowa City, IA Johnson Co. United States	Herbert Hoover Hwy. NE / I-80 WB Ramps (41.67198, -91.44380)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Single-Lane	2022	Previous intersection was entrance ramp only. https://www.news.iowadot.gov/newsandinfo/2022/06/eastbound-i-80-ramps-at-herbert-hoover-highwayjohnson-county-road-f-44-exit-249-in-johnson-county-to.html
Hannibal, MO Marion Co. United States	Shinn Ln. / Hospital Dr. (39.71048, -91.44390)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 161.7046	Other (At-Grade) Single-Lane	2018	https://www.whig.com/20180527/hannibals-shinn-lane-to-close-tuesday-for-roundabout-work ICD estimated from Google Maps linework.
Iowa City, IA Johnson Co. United States	Herbert Hoover Hwy. SE / I-80 EB Ramps (41.67099, -91.44629)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Freeway Ramps (Grade-Separated) Single-Lane	2022	Previous intersection was exit ramp only. https://www.news.iowadot.gov/newsandinfo/2022/06/eastbound-i-80-ramps-at-herbert-hoover-highwayjohnson-county-road-f-44-exit-249-in-johnson-county-to.html
Eau Claire, WI Eau Claire Co. United States	CR Q (North Crossing-Olson Dr.) / Black Ave. / Princeton Crossing (44.83396, -91.44714)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 48.2768	Other (At-Grade) Multilane (2 Lane, unspecified)	2013	ICD estimated from Google Maps linework.
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
Altoona, WI Eau Claire Co. United States	Blue Stem Blvd. / Front Porch Pl. (44.82143, -91.45639)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 33.8858	Other (At-Grade) Single-Lane	2016	https://www.google.com/maps/d/viewer?mid=1kRgB04jjoXd6tLLe0r20FJoxJMI&ll=44.820497288186075%2C-91.45543828018646&z=16. ICD estimated from Google Maps linework.
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.
Altoona, WI Eau Claire Co. United States	Meadowlark Ln. / Front Porch Pl. (44.82051, -91.46056)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 38.1222	Other (At-Grade) Single-Lane	2016	https://www.google.com/maps/d/viewer?mid=1kRgB04jjoXd6tLLe0r20FJoxJMI&ll=44.82028420322557%2C-91.46035208710174&z=16. ICD estimated from Google Maps linework.
Eau Claire, WI Eau Claire Co. United States	Golf Rd. / Rudolph Rd. (44.77115, -91.47843)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.4590	Other (At-Grade) Single-Lane	2007	Opened September 2007. ICD estimated from Google Maps linework.
Iowa City, IA Johnson Co. United States	American Legion Rd. / S Scott Blvd. / Muscatine Ave. (41.64977, -91.48288)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2021	https://www.facebook.com/CityofIowaCity/posts/228146692693035
Eau Claire, WI Eau Claire Co. United States	State St. / E Lexington Blvd. (44.79197, -91.49592)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 39.6240	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2019	Merging right-turn bypass lane on east leg. W Lexington Blvd meets State St just south of the roundabout and is controlled by a stop sign. https://www.eauclairewi.gov/our-city/construction-projects/future-projects/state-street
Eau Claire, WI Eau Claire Co. United States	State St. / MacArthur Ave. (44.78927, -91.49616)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-lane w/ Traversable Central Island	2019	https://www.eauclairewi.gov/our-city/construction-projects/future-projects/state-street
Eau Claire, WI Eau Claire Co. United States	State St. / Hamiton Ave. (44.78565, -91.49619)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-lane w/ Traversable Central Island	2019	Opened October 25, 2019. https://www.eauclairewi.gov/our-city/construction-projects/future-projects/state-street
Eau Claire, WI Eau Claire Co. United States	N Oxford Ave. / Platt St. (44.81844, -91.50956)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 32.0040	Other (At-Grade) Single-Lane	2021	https://www.leadertelegram.com/news/local/working-on-a-roundabout/article_12847177-9b6d-5af1-b66e-a448bf25543c.html
Iowa City, IA Johnson Co. United States	Sycamore St. SE / McCollister Blvd. (41.62554, -91.51193)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 41.1480	Other (At-Grade) Single-Lane	2015	Year Completed estimated (2014-2016). Initially constructed with north and south legs, plus driveway to east. West leg added 2017-2019.
Iowa City, IA Johnson Co. United States	Sycamore St. / Lehman Ave. (41.62058, -91.51211)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 42.6720	Other (At-Grade) Single-Lane	2015	Year Completed estimated (2014-2016).
Eau Claire, WI Eau Claire Co. United States	Hendrickson Dr. / Heights Dr. / University Dr. / Frontage Rd. (44.79457, -91.51466)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 40.6819	Other (At-Grade) Single-Lane	2005	Opened August 2005. ICD estimated from Google Maps linework.
Iowa City, IA Johnson Co. United States	Grand Ave. / S. Grand Ave. (41.65855, -91.54559)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 23.2000	Other (At-Grade) Single-Lane	2007	On University of Iowa school campus. Functional Class: Local ICD estimated from Google Maps linework.
Eau Claire, WI Eau Claire Co. United States	Sherwood Blvd. / Rosewood Ln. (44.81739, -91.55963)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 28.8050	Other (At-Grade) Single-Lane	2007	Opened September 2007. ICD estimated from Google Maps linework.
Coralville, IA Johnson Co. United States	E. 9th St. / Quarry Rd. (41.68176, -91.55988)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 36.5714	Other (At-Grade) Multilane (2 Lane, unspecified)	2006	Opened August 15, 2006. ICD estimated from Google Maps linework.
Coralville, IA Johnson Co. United States	E 9th St. / E 2nd Ave. (41.68169, -91.56306)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020	https://www.coralville.org/887/E-9th-Street
Coralville, IA Johnson Co. United States	E 7th St. / E 2nd Ave. (41.67892, -91.56378)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 43.7092	Other (At-Grade) Single-Lane	2019	Opened to traffic August 2019. East leg will re-open October 2019; north leg open to traffic summer 2020. ICD estimated from Google Maps linework.
Coralville, IA Johnson Co. United States	1st Ave. / Holiday Rd. (41.69276, -91.56655)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 33.8896	Other (At-Grade) Multilane (2 Lane, unspecified)	2002	Opened September 1, 2002. Previously controlled by one-way stop Functional Class: Collector ICD estimated from Google Maps linework.
Coralville, IA Johnson Co. United States	(unknown) / (unknown) (41.72647, -91.56882)	Unknown Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown	2023
Coralville, IA Johnson Co. United States	N Liberty Rd. NE / Forevergreen Rd. (41.72584, -91.57089)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2022	https://www.johnsoncountyiowa.gov/news/secondary-roads/2022-04-21/construction-north-liberty-and-forevergreen-roads-roundabout-begins
Marion, IA Linn Co. United States	29th Ave. / 35th St. (42.05043, -91.57448)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 22.1714	Other (At-Grade) Single-lane w/ Traversable Central Island	2016	Year Completed estimated (2016-2017). ICD estimated from Google Maps linework.
North Liberty, IA Johnson Co. United States	North Liberty Rd. NE / Dubuque St. NE (41.73359, -91.57568)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 42.7807	Other (At-Grade) Single-Lane	2016	https://northlibertyiowa.org/2016/09/26/trail-closure-on-dubuque-street-trail-roundabout-nearing-completion/# ICD estimated from Google Maps linework.
Marion, IA Linn Co. United States	35th St. / Tower Terrace Rd. (42.06130, -91.57655)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 31.9213	Other (At-Grade) Multilane (2 Lane, unspecified)	2011	Fourth leg is stubbed for future expansion. ICD estimated from Google Maps linework.
Coralville, IA Johnson Co. United States	12th Av. / Holiday Rd. (41.69491, -91.58287)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 21.4032	Other (At-Grade) Single-lane w/ Traversable Central Island	2015	Year Completed estimated (2014-2016). ICD estimated from Google Maps linework.
Marion, IA Linn Co. United States	7th Ave. / (future road) / (future road) (42.03286, -91.58364)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 44.3550	Other (At-Grade) Multilane (2 Lane, unspecified)	2016	Elliptical shape. ICD estimated from Google Maps linework.
Marion, IA Linn Co. United States	6th Ave. / 15th St. (42.03243, -91.59397)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane	2019	Year Completed estimated (2018-2019).
Coralville, IA Johnson Co. United States	12th Ave. / Forevergreen Rd. (41.72284, -91.59520)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 32.9823	Other (At-Grade) Single-Lane	2005	http://www.coralville.org/mod/press/documents/12th%20Ave%2011-18-05.pdf. Opened November 16, 2005. ICD estimated from Google Maps linework.
Iowa City, IA Johnson Co. United States	Kennedy Pkwy. / Meadowlark Dr. (41.66899, -91.59541)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 28.5492	Other (At-Grade) Single-Lane	2006	In new residential development. Functional Class: Local ICD estimated from Google Maps linework.
North Liberty, IA Johnson Co. United States	N Front St. / N Bend Dr. (41.75695, -91.59798)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 47.2199	Other (At-Grade) Single-Lane	2019	Completed September 2019. The adjacent dead-end road to the west has been extended up to connect with Front Street at a 90-degree angle across from the existing commercial entrance drive on the east side of Front Street. In the NW quadrant of the roundabout, the farm field site has been redeveloped as a new elementary school. ICD estimated from Google Maps linework.
North Liberty, IA Johnson Co. United States	N Front St. / Penn St. (41.75206, -91.59801)	Roundabout Existing	All-Way Yield None	4 Approaches 2 Driveways 32.0763	Other (At-Grade) Single-Lane	2019	Completed Fall 2019. ICD estimated from Google Maps linework.
Marion, IA Linn Co. United States	10th St. / 10th Ave. / Central Ave. (42.03629, -91.59934)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-lane w/ Traversable Central Island	2021	https://www.cityofmarion.org/Home/Components/News/News/6547/
Coralville, IA Johnson Co. United States	Ridgeway Dr / University Ct (41.71577, -91.59998)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 36.5520	Other (At-Grade) Single-Lane	2013	ICD estimated from Google Maps linework.
Coralville, IA Johnson Co. United States	University Ct / University Pkwy (41.71383, -91.60093)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 36.5531	Other (At-Grade) Single-Lane	2013	ICD estimated from Google Maps linework.
Marion, IA Linn Co. United States	7th Ave. / 7th St. (42.03326, -91.60272)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 39.0322	Other (At-Grade) Multilane (2 Lane, unspecified)	2016	ICD estimated from Google Maps linework.
Coralville, IA Johnson Co. United States	Holiday Rd. / Corridor Way (41.69709, -91.60332)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.3202	Other (At-Grade) Single-Lane	2007	ICD estimated from Google Maps linework.
Coralville, IA Johnson Co. United States	Heartland Dr. / Russell Dr. (41.70007, -91.61160)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 41.9113	Other (At-Grade) Multilane (2 Lane, unspecified)	2013	ICD estimated from Google Maps linework.
Coralville, IA Johnson Co. United States	Oakdale Blvd. / Jones Blvd. (41.70758, -91.61387)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 37.4483	Other (At-Grade) Single-Lane	2015	Year Completed estimated (2014-2016). ICD estimated from Google Maps linework.
Coralville, IA Johnson Co. United States	Commerce Dr. / Commercial Park (41.69560, -91.61393)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.2389	Other (At-Grade) Single-Lane	2014	ICD estimated from Google Maps linework.
Marion, IA Linn Co. United States	Alburnett Rd / Tower Terrace (42.05859, -91.61401)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 39.9034	Other (At-Grade) Multilane (2 Lane, unspecified)	2013	ICD estimated from Google Maps linework.
Winona, MN Winona Co. United States	CSAH 17 / CSAH 15 (44.02020, -91.61581)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 35.2123	Other (At-Grade) Single-Lane	2012	Right-turn bypass lanes on west and east legs. ICD estimated from Google Maps linework.
Marion, IA Linn Co. United States	County Home Rd. / Alburnett Rd. (42.09450, -91.61904)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 45.7200	Other (At-Grade) Single-Lane	2020	Year Completed estimated (2019-2020).
Winona, MN Winona Co. United States	STH 43 (Mankato Ave. - E Sarnia St.) / Mankato Ave. (44.03717, -91.62173)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown	2022	https://www.dot.state.mn.us/d6/projects/hwy43/index.html
Winona, MN Winona Co. United States	STH 43 (Mankato Ave.) / Frontenac Dr. / Parks Ave. (44.03525, -91.62177)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown	2022	https://www.dot.state.mn.us/d6/projects/hwy43/index.html
Winona, MN Winona Co. United States	STH 43 (Mankato Ave.) / Riverbend Rd. (44.03299, -91.62216)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown	2022	Entrance to Winona Health hospital. https://www.dot.state.mn.us/d6/projects/hwy43/index.html
Winona, MN Winona Co. United States	US 14-US 61 / STH 43 (44.02956, -91.62216)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2022	https://www.youtube.com/watch?v=xA9c17OwsGk
North Liberty, IA Johnson Co. United States	St. Andrews Dr. / Alexander Way (41.73776, -91.62789)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 42.6717	Other (At-Grade) Single-Lane	2020
North Liberty, IA Johnson Co. United States	Kansas Ave. / St. Andrews Dr. (41.73785, -91.63707)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 47.2440	Other (At-Grade) Single-Lane	2019
Laddonia, MO Audrain Co. United States	US 54 / MO 19 / CR J (39.28073, -91.64373)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 54.8640	Other (At-Grade) Single-Lane	2022	https://www.modot.org/node/27038
Maryville, IA Fayette Co. United States	IA 3 / IA 187 (42.68763, -91.64565)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.5057	Other (At-Grade) Single-Lane	2009	Rural ICD estimated from Google Maps linework.
Tiffin, IA Johnson Co. United States	E Marengo Rd. (US 6) / Park Rd. (41.70604, -91.64711)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 53.3400	Other (At-Grade) Single-Lane	2019	Designed for expansion to two-lane roundabout. Year Completed estimated (2019-2020).
Marion, IA Linn Co. United States	County Home Rd. / C Ave. Extension (42.09487, -91.64848)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2021	https://cbs2iowa.com/news/local/county-home-road-reopens-in-linn-county-after-improvement-project
Laddonia, MO Audrain Co. United States	US 54 / MO 19 / Hwy BB (39.16323, -91.64907)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 54.8640	Other (At-Grade) Single-Lane	2019	https://www.modot.org/roundabouts-us-route-54
Cedar Rapids, IA Linn Co. United States	Tower Rd. SW / Training Rd. (41.91459, -91.65437)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 33.7725	Other (At-Grade) Multilane (2 Lane, unspecified)	2011	Year Completed estimated (2010-2011). ICD estimated from Google Maps linework.