Roundabouts Database Index

29869 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
Colonial Gardens, MO Boone Co. United States	Rollins Rd. / S Fairview Rd. (38.94681, -92.38090)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 12.0752	Other (At-Grade) Single-lane w/ Traversable Central Island	2013	ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Rollins Rd. / (parking lot entrance) (38.94644, -92.38714)	Roundabout Existing	All-Way Yield Unknown	2 Approaches 1 Driveways 23.2217	Other (At-Grade) Single-Lane	2004	Entrance to parking lot for Bonnie View Nature Sanctuary. ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Rangeline Rd. / I-70 EB Ramps (38.96822, -92.32486)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 31.5719	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2016	ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Grant Ln. / Trailside Dr. / Post Oak Dr. (38.92438, -92.39510)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 16.7249	Other (At-Grade) Single-lane w/ Traversable Central Island	1995	Year Completed estimated (1994-1995). ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	S Scott Blvd. / Vawter School Rd. / S Brushwood Lake Rd. (38.91264, -92.40001)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 34.3846	Other (At-Grade) Single-Lane	2014	ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Hwy KK / S Scott Blvd. / (parking lot entrance) (38.88590, -92.40107)	Roundabout Existing	All-Way Yield Unknown	5 Approaches 0 Driveways 58.5687	Other (At-Grade) Single-Lane	2016	ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Wisteria Ln. / Crape Myrtle Dr. (38.89785, -92.38804)	Traffic Calming Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 19.5196	Other (At-Grade) Single-Lane	2010	ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Cascades Dr. / Marietta Falls Ln. / Vancouver Cir. (38.87294, -92.37750)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 25.1055	Other (At-Grade) Single-Lane	2006	ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	New Town Ave. / Center St. (38.87357, -92.36947)	Traffic Calming Circle Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 18.5965	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Oak Forest, MO Boone Co. United States	Buttonwood Dr. / MO-163 (S Providence Rd) NB Ramps / (frontage road) (38.91363, -92.33413)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 29.7376	Freeway Ramps (Grade-Separated) Single-Lane	2009	ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	E Green Meadows Rd. / Carter Ln. (38.91638, -92.33246)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 1 Driveways 32.5242	Other (At-Grade) Single-Lane	2010	Bing map has this on S Providence Rd, but that's wrong, since Providence Rd is the N-S freeway just to the west. Googlemaps says Carter Ln. ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	E Southampton Dr. / State Farm Pkwy. (38.90095, -92.32656)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 31.6018	Other (At-Grade) Single-Lane	2008	Two approaches stubbed. ICD estimated from Google Maps linework.
Bearfield Plaza, MO Boone Co. United States	S Bearfield Rd. / Chinaberry Dr. / Old US 63 (38.91501, -92.30289)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 25.0906	Other (At-Grade) Single-Lane	2003	Year Completed estimated (1995-2003). ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Bristol Lake Dr. / Braddington Dr. (38.89246, -92.29611)	Traffic Calming Circle Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 22.3098	Other (At-Grade) Single-Lane	2006	fourth approach is now built; see Google satellite view ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Nocona Pkwy. / Kentsfield Ln. (38.89915, -92.28609)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 45.5450	Other (At-Grade) Single-Lane	2014	ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Ponderosa St. / Nocona Pkwy. / Kentsfield Ln. (38.90172, -92.28732)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 44.6139	Other (At-Grade) Single-Lane	2014	ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Ponderosa St. / Philips Farm Rd. (38.90387, -92.29025)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 40.8948	Other (At-Grade) Single-Lane	2014	ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Columbia Gorge Pkwy. / (unknown) (38.92607, -92.25845)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 29.7324	Other (At-Grade) Single-Lane	2007	ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Hwy WW / S Rolling Hills Rd. (38.92866, -92.25605)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 47.2440	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2016
Columbia, MO Boone Co. United States	Hwy Z / E St Charles Rd. (38.97300, -92.20385)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 40.8550	Other (At-Grade) Single-Lane	2014	Year Completed estimated (2013-2015). ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Rangeline Rd. / I-70 WB Ramps (38.96927, -92.32512)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 26.0000	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2016	ICD estimated from Google Maps linework.
Zionsville, IN Boone Co. United States	Ford Rd. / Bloor Ln. (39.95703, -86.27903)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 28.3800	Other (At-Grade) Single-Lane	2015	ICD estimated from Google Maps linework.
Zionsville, IN Boone Co. United States	Whitestown Rd. / Ford Rd. / Mulberry St. / Pleasant View Rd. (39.96447, -86.28292)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.6154	Other (At-Grade) Single-Lane	2017	Yield-controlled right-turn bypass lane on west leg. ICD estimated from Google Maps linework.
Whitestown, IN Boone Co. United States	Main St. / Central Blvd. (39.95261, -86.34519)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 44.8616	Other (At-Grade) Multilane (2 Lane, unspecified)	2007	ICD estimated from Google Maps linework.
Whitestown, IN Boone Co. United States	Main St. / Mills Dr. (39.95116, -86.34507)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 54.9338	Other (At-Grade) Multilane (2 Lane, unspecified)	2007	ICD estimated from Google Maps linework.
Whitestown, IN Boone Co. United States	Whitestown Pkwy. / S Indianapolis Rd. (39.94596, -86.35860)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 61.3474	Other (At-Grade) Multilane (2 Lane, unspecified)	2018	http://youarecurrent.com/2018/02/23/roundabout-construction-to-begin-in-april-at-whitestown-parkway-indianapolis-road/ ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Vandiver Dr. / Parker St. (38.97104, -92.31310)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 61.2841	Other (At-Grade) Single-Lane	2018	ICD estimated from Google Maps linework.
Zionsville, IN Boone Co. United States	Michigan Rd. (US 421) / West Base Line Rd. (40.04096, -86.28524)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 40.2318	Other (At-Grade) Single-Lane	2015	Merge-type right-turn bypass lanes on north and south legs. ICD estimated from Google Maps linework.
Union, KY Boone Co. United States	Sweet Harmony Ln. / Dawns Light (38.95298, -84.67487)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 49.2256	Other (At-Grade) Single-Lane	2007	Year Completed estimated (2006-2008). ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Forum Blvd. / Green Meadows Rd. (38.91311, -92.35373)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 22.3034	Other (At-Grade) Multilane (2 Lane, unspecified)	2019	https://www.youtube.com/watch?v=HiB5NQzLK9w. Completed October 2019. ICD estimated from Google Maps linework.
Hebron, KY Boone Co. United States	N Bend Rd. (KY 237) / Cardinal Way / Park and Ride Dr. (39.09299, -84.71405)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 38.0048	Other (At-Grade) Single-Lane	2009	http://local.nixle.com/alert/290390/ ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Bass Ave. / S Williams St. (38.94899, -92.31709)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 27.8651	Other (At-Grade) Single-Lane	2011	ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Business Loop 70 / I-70 WB On-Ramp (38.96647, -92.35328)	Roundabout Existing	All-Way Yield Unknown	2 Approaches 1 Driveways 35.2871	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2016	Replaced older roundabout that was built in 1996. ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Business Loop 70 / I-70 EB Ramps / Interstate 70 Dr. SW (38.96640, -92.35032)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 46.4304	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2016	ICD estimated from Google Maps linework.
Columbia, MO Boone Co. United States	Business Loop 70 / I-70 WB Ramps / Creasy Springs Rd. (38.96655, -92.35241)	Roundabout Removed	All-Way Yield Unknown	5 Approaches 0 Driveways 94.7178	Freeway Ramps (Grade-Separated) Single-Lane	1996	First roundabout in Missouri by Missouri DOT. Originally built in 1996 per article: https://www.voxmagazine.com/news/all-about-roundabouts-in-columbia/article_93724b2b-8b20-5228-b4de-315c5c3d2004.html. Replaced with roundabout to immediate west. ICD estimated from Google Maps linework.
Negotin, Centralna Srbija Bor District Serbia	SR 33 (Zelena Pijaca - Ulica Age Rogožinarevića) / Ulica Jovana Dinkića / Ulica Srbe Jovanovića (44.23323, 22.52986)	Roundabout Existing	All-Way Yield None	4 Approaches 1 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Löttorp, Kalmar County Borgholm Sweden	Rte 136 / Löttorpsvägen (57.16442, 17.01357)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 26.5516	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Borne, Overijssel Borne Netherlands	N743 / Deuringerweg (52.30344, 6.76110)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 54.7731	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Kew, VIC Boroondara Australia	SR 21 (Princess St.) / Willsmere Rd. / Eglinton St. / Willis St. / Main Dr. (-37.79910, 145.03025)	Roundabout Existing	All-Way Yield Metering Signal	6 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)		Metering signal on north leg. Pedestrian signal on south leg.
Balwyn, VIC Boroondara Australia	Belmore Rd. / Union Rd. / Kalonga Rd. (-37.80424, 145.10134)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Bossier City, LA Bossier Par. United States	W 1st St. / Spears St. (32.52108, -93.73971)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 32.2256	Other (At-Grade) Single-Lane	2013	ICD estimated from Google Maps linework.
Bossier City, LA Bossier Par. United States	W 1st St. / Margaritaville Way / Colquitt St. (32.52193, -93.73982)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 30.2112	Other (At-Grade) Single-Lane	2013	ICD estimated from Google Maps linework.
Bossier City, LA Bossier Par. United States	US 79-US 80 (E Texas St.) / Old Benton Rd. (32.52639, -93.73056)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown	2020	Year Completed estimated (2019-2021).
Bossier City, LA Bossier Par. United States	Walter O. Bigby Carriageway / Hamilton Rd. (32.52940, -93.72630)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 53.3400	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2024	https://www.shreveporttimes.com/story/news/local/2024/10/01/walter-o-bigby-carriageway-opens-in-bossier-city/75455416007/
Bossier City, LA Bossier Par. United States	Walter O. Bigby Carriageway / Shed Rd. (32.53213, -93.72376)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 60.9600	Other (At-Grade) Multilane (2 Lane, 2x2 max)	2024	https://www.shreveporttimes.com/story/news/local/2024/10/01/walter-o-bigby-carriageway-opens-in-bossier-city/75455416007/
Troutville, VA Botetourt Co. United States	US 11-US 220 / I-81 NB Ramps / Cloverdale Rd. Connector (37.39049, -79.90025)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 55.0369	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2017	ICD estimated from Google Maps linework.
Tumba, Stockholm County Botkyrka Sweden	Tumbavägen / Sedelvägen (59.20192, 17.82574)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 24.4605	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Tumba, Stockholm County Botkyrka Sweden	Tumbavägen / Munkhättevägen (59.20049, 17.82692)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 20.7923	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Grödinge, Stockholm County Botkyrka Sweden	Rte 258 / E20 Ramps / Sankt Botvids väg / Tumbakopplet (59.24028, 17.83454)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 76.3533	Freeway Ramps (Grade-Separated) Single-Lane		ICD estimated from Google Maps linework.
Norsborg, Stockholm County Botkyrka Sweden	Segersbyvägen / Kumla gårdsväg (59.23676, 17.83537)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 28.7118	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Tumba, Stockholm County Botkyrka Sweden	Rte 258 / Tumbavägen / Tuna gårdsväg (59.21458, 17.82988)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 40.3449	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Norsborg, Stockholm County Botkyrka Sweden	Rte 259 / E18 WB Ramps / Botkyrkaladen / Fågelviksvägen (59.25263, 17.85326)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 40.2999	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)		ICD estimated from Google Maps linework.
Norsborg, Stockholm County Botkyrka Sweden	Rte 259 / Hallundavägen / E4-E20 EB Ramps (59.25142, 17.85925)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 42.1332	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)		ICD estimated from Google Maps linework.
Norsborg, Stockholm County Botkyrka Sweden	Fittjavägen / (parking lot) (59.25233, 17.86353)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 14.0440	Other (At-Grade) Single-lane w/ Traversable Central Island		ICD estimated from Google Maps linework.
Norsborg, Stockholm County Botkyrka Sweden	Rte 259 / Fittjavägen (59.25016, 17.86504)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 38.4709	Other (At-Grade) Multilane (2 Lane, unspecified)		ICD estimated from Google Maps linework.
Norsborg, Stockholm County Botkyrka Sweden	Fittjavägen / Tegelbruksvägen / (parking lot) (59.25080, 17.86532)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 29.3106	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Tullinge, Stockholm County Botkyrka Sweden	Flottiljvägen / Rullstensvägen / Kanslivägen (59.18849, 17.91650)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 22.6349	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Marseille, Provence-Alpes-Côte d'Azur Bouches-du-Rhône France	Rond-Point Alain Savary (43.24610, 5.39494)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Marseille, Provence-Alpes-Côte d'Azur Bouches-du-Rhône France	Chemin du Roy d'Espagne / Boulevard de l'Océan / Rue Floralia (43.24166, 5.39710)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Marseille, Provence-Alpes-Côte d'Azur Bouches-du-Rhône France	Chemin du Roy d'Espagne / Rue Capitaine Jean Crosia / Allée Emmanuel Chabrier (43.23528, 5.39908)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Marseille, Provence-Alpes-Côte d'Azur Bouches-du-Rhône France	Rond-Point Robert Bouvier (43.25250, 5.42188)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Marseille, Provence-Alpes-Côte d'Azur Bouches-du-Rhône France	Rue Pierre Doize / Rue François Mauriac (43.27035, 5.42318)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Marseille, Provence-Alpes-Côte d'Azur Bouches-du-Rhône France	Place de Saint-Tronc (43.27227, 5.42854)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Multilane (2 Lane, unspecified)
Marseille, Provence-Alpes-Côte d'Azur Bouches-du-Rhône France	Rue du Professeur Roger Luccioni / Rue André Audoli (43.27300, 5.43095)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Marseille, Provence-Alpes-Côte d'Azur Bouches-du-Rhône France	Traverse Chevalier / Rue du Professeur Roger Luccioni (43.27314, 5.43143)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Allauch, Provence-Alpes-Côte d'Azur Bouches-du-Rhône France	D4A (Avenue Jean Giono) / D44G (Avenue de Provence) / Chemin du Guéridon (43.33178, 5.48650)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Allauch, Provence-Alpes-Côte d'Azur Bouches-du-Rhône France	D4A (Avenue Jean Giono) / D44F (43.33570, 5.47722)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Allauch, Provence-Alpes-Côte d'Azur Bouches-du-Rhône France	D4B (Avenue du 7ème Régiment de Tirailleurs Algériens) / D44F (43.33813, 5.47424)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Allauch, Provence-Alpes-Côte d'Azur Bouches-du-Rhône France	D4A / Avenue du Général de Gaulle (43.33943, 5.48429)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Allauch, Provence-Alpes-Côte d'Azur Bouches-du-Rhône France	D4A / Chemin de Caguerasset / Chemin du Capitaine Guyonnet / Route du Clau (43.34948, 5.48750)	Roundabout Existing	All-Way Yield Unknown	6 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Allauch, Provence-Alpes-Côte d'Azur Bouches-du-Rhône France	Place Mouren (43.35605, 5.48678)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Allauch, Provence-Alpes-Côte d'Azur Bouches-du-Rhône France	D908 / Avenue Salvador Allende (43.35433, 5.48476)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Upper Clover Basin, CO Boulder Co. United States	Mountain Dr. / Boundary Pl. (40.14560, -105.17468)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2015	Year Completed estimated (2014-2015).
Lower Clover Basin, CO Boulder Co. United States	Portico Ln. / Portico Pl. (40.13727, -105.17304)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		No splitter islands on two legs.
East Side, CO Boulder Co. United States	E 21st Ave. / Alpine St. (40.19588, -105.08752)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2005	Year Completed estimated (2004-2005).
Upper Clover Basin, CO Boulder Co. United States	Clover Basin Dr. / Eagan Way / Eagan Cir. (40.14043, -105.16769)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2014
Lafayette, CO Boulder Co. United States	Casper Dr. / Saratoga Dr. (39.98211, -105.08539)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Lafayette, CO Boulder Co. United States	Cheyenne Dr. / Saratoga Dr. (39.98066, -105.08535)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Lafayette, CO Boulder Co. United States	Casper Dr. / Cody Ct. (39.98213, -105.08776)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown
Erie, CO Boulder Co. United States	Erie Pkwy. / 119th St. (40.03679, -105.07454)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2008	Right-turn-only lane on south leg. Year Completed estimated (2008-2010).
Erie, CO Boulder Co. United States	Jasper Rd. / Lombard St. (40.05485, -105.06504)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 33.5280	Other (At-Grade) Single-Lane	2021	Year Completed estimated (2020-2021).
Longmont, CO Boulder Co. United States	Sundance Dr. / Galapagos Pl. (40.20011, -105.06468)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2016	Year Completed estimated (2016-2017).
Longmont, CO Boulder Co. United States	Sundance Dr. / Tyrrhenian Dr. (40.20202, -105.06468)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2016	Year Completed estimated (2016-2017).
Longmont, CO Boulder Co. United States	Sundance Dr. / Tyrrhenian Cir. (40.19784, -105.06451)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2016	Year Completed estimated (2016-2017).
Longmont, CO Boulder Co. United States	Sundance Dr. / Twilight Dr. (40.19529, -105.06175)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2016	Initial construction without splitter islands 1999-2002. Splitter islands added 2016-2017.
Longmont, CO Boulder Co. United States	S Martin St. / Bountiful Ave. (40.14740, -105.08831)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2017
Lafayette, CO Boulder Co. United States	Roser Dr. / Crater Lake Ln. / Murphy Creek Dr. (39.99879, -105.13387)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2009	Year Completed estimated (2008-2010).
Louisville, CO Boulder Co. United States	Roser Dr. / W Hecla Dr. / Paschal Dr. (39.99411, -105.13074)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 33.5280	Other (At-Grade) Single-Lane	2011
Louisville, CO Boulder Co. United States	E Hecla Dr. / Snowberry Ln. (39.99167, -105.12415)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2008	Year Completed estimated (2007-2008).
Louisville, CO Boulder Co. United States	E Hecla Dr. / Golden Eagle Way / Rose Ct. (39.99337, -105.12375)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2008	Year Completed estimated (2007-2008).
Superior, CO Boulder Co. United States	McCaslin Blvd. / Main St. (39.95173, -105.16511)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 51.2711	Other (At-Grade) Multilane (2 Lane, unspecified)	2017	West leg stubbed for future. ICD estimated from Google Maps linework.
Superior, CO Boulder Co. United States	Main St. / Gateway Dr. (39.95169, -105.16353)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2017	Elliptical shape.
Superior, CO Boulder Co. United States	McCaslin Blvd. / Coalton Rd. (39.92872, -105.16582)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 31.1393	Other (At-Grade) Single-Lane	2009	ICD estimated from Google Maps linework.
Boulder, CO Boulder Co. United States	Cherryvale Rd. / Oreg St. (40.01320, -105.21292)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 26.5272	Other (At-Grade) Single-Lane	2015	ICD estimated from Google Maps linework.
Superior, CO Boulder Co. United States	5th Ave. / Center Dr. (39.95764, -105.17190)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 31.1262	Other (At-Grade) Single-Lane	1999	Serves Costco and Target as part of 750,000 square foot shopping center. Functional Class: Local ICD estimated from Google Maps linework.
Boulder, CO Boulder Co. United States	St. Johns St. / New Haven Ct. (Hampton Circle) (40.04742, -105.24740)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 25.5996	Other (At-Grade) Single-Lane	1997	ICD estimated from Google Maps linework.
Boulder, CO Boulder Co. United States	Arapahoe Ave. / 4th St. (40.01294, -105.29160)	Traffic Calming Circle Existing	One-Way/Two-Way Stop None	3 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Boulder, CO Boulder Co. United States	Arapahoe Ave. / 5th St. (40.01295, -105.28920)	Traffic Calming Circle Existing	One-Way/Two-Way Stop None	3 Approaches 0 Driveways	Other (At-Grade) Single-Lane
Boulder, CO Boulder Co. United States	Balsam Ave. / 14th St. (40.02675, -105.27840)	Traffic Calming Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 16.4619	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Boulder, CO Boulder Co. United States	Balsam Ave. / 15th St. (40.02675, -105.27660)	Traffic Calming Circle Existing	All-Way Yield None	4 Approaches 0 Driveways 8.2310	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.