Roundabouts Database Index

29411 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
Tucson, AZ Pima Co. United States	W Hardy Rd. / N Camino de Anza / N Calle Buena Vista / N Northern Ave. (32.36640, -110.97874)	Roundabout Existing	All-Way Yield None	5 Approaches 0 Driveways 44.3863	Other (At-Grade) Single-Lane	2010	ICD estimated from Google Maps linework.
Nogales, AZ Santa Cruz Co. United States	SR 189 (N Mariposa Rd.) / Target Range Rd. (31.34754, -110.96447)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 65.5320	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2021	Yield-controlled right-turn bypass lanes on south and east legs. https://azdot.gov/adot-news/roundabout-opens-target-range-road
Tucson, AZ Pima Co. United States	E Tucson Marketplace Blvd. / (parking lot) (32.18277, -110.94868)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 48.5196	Other (At-Grade) Multilane (2 Lane, unspecified)	2011	ICD estimated from Google Maps linework.
Armington, MT Cascade Co. United States	US 87-SR 200 / US 89 / (parking) (47.34909, -110.89673)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2022	Year Completed estimated (2022-2023). https://www.youtube.com/watch?v=7jSH18jbyKc
Tucson, AZ Pima Co. United States	E Southpoint Rd. / E Outlook Dr. (32.14272, -110.84836)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Speed bumps in circulatory roadway.
Tucson, AZ Pima Co. United States	E Outlook Dr. / S McCulloch Dr. (32.14387, -110.84575)	Other Existing	Unknown Unknown	2 Approaches 2 Driveways 0.0000	Other (At-Grade) Single-Lane		Speed bumps in circulatory roadway.
Tucson, AZ Pima Co. United States	E Southpoint Rd. / S McCulloch Dr. (32.14076, -110.84515)	Other Existing	Unknown Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Speed bumps in circulatory roadway.
Tucson, AZ Pima Co. United States	Kolb Rd. / E Territory Dr. (32.30652, -110.84391)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2022	Metal art in central island.
Tucson, AZ Pima Co. United States	E Southpoint Rd. / S McRae Pl. (32.14260, -110.84237)	Other Existing	Unknown Unknown	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane		Speed bumps in circulatory roadway.
Jackson, WY Teton Co. United States	Gros Ventre Junction (US-26 / US 89 / US 191 / Golf Course Rd / Gros Ventre Rd) (43.57420, -110.73327)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 38.9371	Other (At-Grade) Single-Lane	2018	Under construction summer 2018. https://www.nps.gov/grte/planyourvisit/gros-ventre-roundabout.htm The Gros Ventre intersection on US Hwy 26/89/191 has an average daily traffic volume of approximately 14,200 vehicles and almost 200 bicycle riders during the summer season. ICD estimated from Google Maps linework.
Jackson, WY Teton Co. United States	US 89 / US 191 (43.32233, -110.73067)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 38.2307	Other (At-Grade) Single-Lane	2012	Year Completed estimated (2009-2013). ICD estimated from Google Maps linework.
Medicine Hat, AB Division 1 Canada	College Dr. / College Dr. (50.01654, -110.68389)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 35.0000	Other (At-Grade) Single-Lane	2008	Year Completed estimated (2005-2010).
Medicine Hat, AB Division 1 Canada	2 Ave. SE / 8 St. SE (50.03145, -110.68217)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-lane w/ Traversable Central Island	2024	https://medicinehatnews.com/news/local-news/2024/10/04/hurry-before-the-snow-city-road-construction-nears-finish-line-as-fall-weather-arrives/
Medicine Hat, AB Division 1 Canada	College Dr. SE / (parking) (50.01817, -110.68204)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 34.0000	Other (At-Grade) Single-Lane	2007	Year Completed estimated (2005-2009).
Bonnyville No 87, AB Alberta Canada	AB Hwy 55 / AB Hwy 892 (54.45699, -110.48469)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 43.0454	Other (At-Grade) Single-Lane	2012	ICD estimated from Google Maps linework.
Sierra Vista, AZ Cochise Co. United States	Smith Ave. / Winrow Ave. / Cushing St. (31.55504, -110.36013)	Rotary Existing	All-Way Yield None	4 Approaches 0 Driveways 60.9600	Other (At-Grade) Single-Lane	1992	On base of Fort Huachuca. No truck apron. Very little speed control on east leg. Year Completed estimated (1985-1992).
Sierra Vista, AZ Cochise Co. United States	Derum St. / Rucker St. / Smith Ave. / Winrow Rd. (31.55118, -110.34837)	Rotary Existing	All-Way Yield None	4 Approaches 0 Driveways 60.9600	Other (At-Grade) Single-Lane	2011	On base of Fort Huachuca. No truck apron.
Sierra Vista, AZ Cochise Co. United States	Rucker St. / Cooney St. / Jeffords St. (31.55599, -110.34628)	Other Existing	All-Way Stop None	4 Approaches 0 Driveways 36.5760	Other (At-Grade) Single-Lane	2010	Stop line at each entry. Pedestrian crossings within circulatory roadway.
Sierra Vista, AZ Cochise Co. United States	Jeffords St. / Cushing St. (31.55698, -110.33997)	Other Existing	All-Way Stop None	4 Approaches 0 Driveways 37.7952	Other (At-Grade) Single-Lane	2010	Stop line at each entry. Pedestrian crossings within circulatory roadway.
Sierra Vista, AZ Cochise Co. United States	E Golden Acres Dr. / Canyon de Flores (31.50212, -110.25097)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 60.9600	Other (At-Grade) Multilane (2 Lane, unspecified)	2014	ADOT truck turnaround. Year Completed estimated (2013-2015).
Oljato-Monument Valley, UT San Juan Co. United States	US 163 / Monument Valley Rd. (37.00424, -110.17341)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2019	https://www.nhonews.com/news/2018/jun/19/oljato-community-breaks-ground-roundabout-road-nav/
Show Low, AZ Navajo Co. United States	W Sugar Pine Way / S Torreon Loop (34.24261, -110.08372)	Other Existing	Unknown Unknown	3 Approaches 1 Driveways 39.6240	Other (At-Grade) Single-Lane	2007	No splitter islands on two legs. One leg of the intersection is a private community access point.
Show Low, AZ Navajo Co. United States	S Summit Trl. / W Sugar Pine Way / Spirea Ln. (34.24039, -110.07928)	Other Existing	All-Way Yield None	4 Approaches 0 Driveways 31.0896	Other (At-Grade) Single-Lane	2007	No splitter islands on two legs, and diverging double yellow lines on two legs.
Show Low, AZ Navajo Co. United States	S Summit Trl. / Falling Leaf Rd. (34.23781, -110.07255)	Other Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2007	No splitter islands on two legs, and diverging double yellow lines on two legs.
Show Low, AZ Navajo Co. United States	S Summit Trl. / (parking) (34.23113, -110.06795)	Other Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2007	No splitter islands on two legs, and diverging double yellow lines on two legs.
Bisbee, AZ Cochise Co. United States	Bisbee Rd. / SR 80 / SR 92 (31.42830, -109.89230)	Rotary Existing	All-Way Yield None	4 Approaches 0 Driveways 104.9686	Other (At-Grade) Single-Lane		ICD estimated from Google Maps linework.
Thatcher, AZ Graham Co. United States	W Golf Course Rd. / Hoopes Ave. / S Robinson Ave. (32.80760, -109.76289)	Roundabout Existing	All-Way Yield None	5 Approaches 0 Driveways 62.2373	Other (At-Grade) Single-Lane	2017	http://leagueaz.org/connection/2018/0218/thatcher.html ICD estimated from Google Maps linework.
Thatcher, AZ Graham Co. United States	W Church St. / N High School Ave. (32.84581, -109.75898)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020	https://gilaherald.com/church-street-roundabout-open-for-business/
Safford, AZ Graham Co. United States	N 8th Ave. / Safford Bryce Rd. / Airport Rd. (32.85769, -109.71607)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020	https://gilaherald.com/graham-county-roundabout-working-well/
Burnside, AZ Apache Co. United States	US 191 / AZ 264 (35.75473, -109.62710)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 54.8640	Other (At-Grade) Single-Lane	2009	Right-turn bypass lane. Elliptical shaped. ICE = 180 ft x 160 ft.
Maeser, UT Uintah Co. United States	Main St. / Aggie Blvd. (40.45562, -109.56693)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 54.8640	Other (At-Grade) Multilane (2 Lane, unspecified)	2009	Year Completed estimated (2009-2011).
Chinle, AZ Apache Co. United States	Navajo Rte 27 / Navajo Rte 7 (36.15072, -109.55430)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Multilane (2 Lane, unspecified)	2021	https://www.nhonews.com/news/2021/jan/19/11-miles-navajo-route-27-paved-between-chinle-and-/
Red Lodge, MT Carbon Co. United States	US 212 (Broadway Ave.) / 3rd St. (45.19487, -109.24681)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 40.3987	Other (At-Grade) Single-Lane	2015	ICD estimated from Google Maps linework.
Fruita, CO Mesa Co. United States	CO-340 / Raptor Rd. (39.15351, -108.73813)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 47.2337	Other (At-Grade) Multilane (2 Lane, unspecified)	2009	ICD estimated from Google Maps linework.
Fruita, CO Mesa Co. United States	CO-340 / I-70 EB Ramps / I-70 Frontage Rd. (39.15470, -108.73769)	Roundabout Existing	All-Way Yield Active Pedestrian Warning (flashing yellow)	4 Approaches 0 Driveways 40.7499	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2009	ICD estimated from Google Maps linework.
Fruita, CO Mesa Co. United States	Aspen Ave. / Mesa St. (Park Square) (39.15884, -108.73360)	Other Existing	Unknown Unknown	0 Approaches 0 Driveways 77.7908	Other (At-Grade) Unknown		Completed 1940? ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	Ironwood Dr. / Woodcreek Dr. (45.81641, -108.67716)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2003
Billings, MT Yellowstone Co. United States	Central Ave. / 56th St. W (45.76970, -108.65917)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2022	https://www.mdt.mt.gov/pubinvolve/56thRoundabouts/
Billings, MT Yellowstone Co. United States	King Ave. W / S 56th St. W (45.75516, -108.65895)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2022	https://www.yourbigsky.com/local-news-2/billings-king-ave-56th-st-w-reopened/
Grand Junction, CO Mesa Co. United States	Broadway / Redlands Pkwy. (39.07812, -108.63467)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 41.7214	Other (At-Grade) Multilane (2 Lane, unspecified)	2018	ICD estimated from Google Maps linework.
Grand Junction, CO Mesa Co. United States	G Rd. / 23rd Rd. (39.10632, -108.62669)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane	2011	Specifically designed for over-length, WB-110 trucks.
Billings, MT Yellowstone Co. United States	King Ave. / St. Vincent Way (45.75520, -108.62260)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.9990	Other (At-Grade) Multilane (2 Lane, unspecified)	2009	Previously controlled by two-way stop Functional Class: Principal Arterial ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	St Mary Way / Marillac St. / Henry Chapple St. (45.75672, -108.62191)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 39.9980	Other (At-Grade) Single-Lane	2013	One approach stubbed out. ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	Henry Chapple St. / St Vincent Way (45.75948, -108.61935)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 36.6630	Other (At-Grade) Single-Lane	2013	One approach stubbed out. ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	Shiloh Rd. / Grand Ave. (45.78407, -108.61760)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 39.1455	Other (At-Grade) Multilane (2 Lane, unspecified)	2009	Series of 8 roundabouts. Fatal crash 2012. 11861-05. Functional Class: Principal Arterial ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	Shiloh Rd. / Broadwater Ave. (45.77685, -108.61760)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 44.9815	Other (At-Grade) Multilane (2 Lane, unspecified)	2009	Series of 8 roundabouts. Functional Class: Principal Arterial ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	Shiloh Rd. / Central Ave. (45.76963, -108.61760)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 53.3183	Other (At-Grade) Multilane (2 Lane, unspecified)	2010	Series of 8 roundabouts. Functional Class: Principal Arterial ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	Shiloh Rd. / Monad Rd. (45.76236, -108.61760)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 46.6596	Other (At-Grade) Multilane (2 Lane, unspecified)	2010	Series of 8 roundabouts. Previously controlled by two-way stop Functional Class: Principal Arterial ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	Shiloh Rd. / King Ave. (45.75507, -108.61760)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 58.3321	Other (At-Grade) Multilane (2 Lane, unspecified)	2010	Series of 8 roundabouts. Functional Class: Principal Arterial ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	Shiloh Rd. / (Local Access) (45.74776, -108.61750)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 37.5041	Other (At-Grade) Multilane (2 Lane, unspecified)	2010	Series of 8 roundabouts. Main access to construction materials facility (600+ trucks per day). Previously controlled by two-way stop Functional Class: Principal Arterial ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	Shiloh Rd. / Hesper Rd. (45.74060, -108.61740)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 43.3436	Other (At-Grade) Multilane (2 Lane, unspecified)	2009	Series of 8 roundabouts. Functional Class: Principal Arterial ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	Shiloh Rd. / Zoo Dr. (45.73609, -108.61740)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 41.6799	Other (At-Grade) Multilane (2 Lane, unspecified)	2009	Series of 8 roundabouts. Previously controlled by two-way stop Functional Class: Principal Arterial ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	Shiloh Crossing Blvd. / Olympic Blvd. (45.75216, -108.61570)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 34.1677	Other (At-Grade) Single-Lane	2009	Functional Class: Local ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	King Ave. / Olympic Blvd. (45.75507, -108.61360)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.1658	Other (At-Grade) Multilane (2 Lane, unspecified)	2008	Near Kohl's retail shopping center. Previously controlled by one-way stop Functional Class: Arterial ICD estimated from Google Maps linework.
West End, MT Yellowstone Co. United States	Central Ave. / S 38th St. W (45.76969, -108.61240)	Roundabout Existing	All-Way Yield Pedestrian Hybrid Beacon (PHB, HAWK)	4 Approaches 0 Driveways 47.2440	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2019
Billings, MT Yellowstone Co. United States	Grand Ave. / 38th St. W (45.78400, -108.61111)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 44.9757	Other (At-Grade) Multilane (2 Lane, unspecified)	2017	Fourth leg stubbed. ICD estimated from Google Maps linework.
Grand Junction, CO Mesa Co. United States	24 Rd. / I-70 WB Ramps (39.11454, -108.60820)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 40.7732	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2006	ICD estimated from Google Maps linework.
Grand Junction, CO Mesa Co. United States	24 Rd. / I-70 EB Ramps (39.11333, -108.60820)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 37.0672	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2006	ICD estimated from Google Maps linework.
Grand Junction, CO Mesa Co. United States	24 Rd. / G Rd. (39.10637, -108.60819)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 45.7200	Other (At-Grade) Single-Lane	2023	https://www.westernslopenow.com/news/local-news/the-artist-for-the-24-rd-roundabout-is-picked/
West End, MT Yellowstone Co. United States	Central Ave. / S 36th St. W (45.76949, -108.60726)	Roundabout Existing	All-Way Yield Pedestrian Hybrid Beacon (PHB, HAWK)	4 Approaches 0 Driveways 47.2440	Other (At-Grade) Multilane (2 Lane, 2x1 max)	2019
Billings, MT Yellowstone Co. United States	Grand Ave. / 36th St. W (45.78403, -108.60541)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 50.8058	Other (At-Grade) Multilane (2 Lane, unspecified)	2018	Year Completed estimated (2015-2019). ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	MT Hwy 3 / Zimmerman Trl. (45.80647, -108.59981)	Roundabout Existing	All-Way Yield Unknown	3 Approaches 0 Driveways 44.1250	Other (At-Grade) Single-Lane	2018	ICD estimated from Google Maps linework.
Grand Junction, CO Mesa Co. United States	G Rd. / 24 1 / 2 Rd. (39.10635, -108.59870)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 34.2905	Other (At-Grade) Single-Lane	2005	ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	Meadow View Dr. / Meadow View Dr. (45.78325, -108.59372)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 28.9560	Other (At-Grade) Single-Lane	2017	South leg stubbed. Year Completed estimated (2015-2018).
Grand Junction, CO Mesa Co. United States	G Rd. / 25th Rd. (39.10636, -108.58940)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 30.5834	Other (At-Grade) Single-Lane	2002	ICD estimated from Google Maps linework.
Grand Junction, CO Mesa Co. United States	Independent Ave. / Sams Club entrance (39.08170, -108.58310)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 33.3754	Other (At-Grade) Single-Lane	2003	Serves commercial development parking lot. ICD estimated from Google Maps linework.
Grand Junction, CO Mesa Co. United States	Park Dr. / Meander Dr. / Meander Ct. (39.09085, -108.57322)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 30.4800	Other (At-Grade) Single-Lane	2009	Year Completed estimated (2006-2011).
Grand Junction, CO Mesa Co. United States	Grand Ave. / N 1st St. / SR 340 (Broadway) / I-70 Business Loop (39.07031, -108.57097)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Unknown	2022	https://www.codot.gov/news/2021/august-2021/1st-street-roundabout-project-enters-new-phase
Grand Junction, CO Mesa Co. United States	Colorado Ave. / S. 2nd St. (39.06636, -108.56950)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 25.9643	Other (At-Grade) Single-Lane	2002	ICD estimated from Google Maps linework.
Grand Junction, CO Mesa Co. United States	Main St. / 7th St. (39.06731, -108.56104)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 26.8912	Other (At-Grade) Single-Lane	2007	ICD estimated from Google Maps linework.
Grand Junction, CO Mesa Co. United States	Horizon Dr. / 12th St. (39.10165, -108.55234)	Roundabout Existing	All-Way Yield None	4 Approaches 1 Driveways 39.6240	Other (At-Grade) Single-Lane	1998	Bicycle-only (bike-only) driveway into circulatory roadway in northeast quadrant, leading into bicycle (bike) roundabout.
Grand Junction, CO Mesa Co. United States	Main St. / N 13th St. / S 13th St. (39.06731, -108.55072)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-lane w/ Traversable Central Island	2023	https://www.gjsentinel.com/news/western_colorado/mini-roundabout-installed-at-13th-and-main/article_bbcc8188-a4fb-11ee-bc44-b755269e8d08.html
Grand Junction, CO Mesa Co. United States	Horizon Dr. / I-70 EB Ramps / Horizon 70 Ct. (39.11140, -108.54051)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 50.0420	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2015	ICD estimated from Google Maps linework.
Grand Junction, CO Mesa Co. United States	Horizon Dr. / I-70 WB Ramps (39.11215, -108.53938)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 50.0415	Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified)	2015	ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	Hwy 3 / 27th St. / Airport Rd. (45.80209, -108.53540)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 45.7937	Other (At-Grade) Multilane (2 Lane, unspecified)	2009	Located at Billings airport. Functional Class: Principal Arterial ICD estimated from Google Maps linework.
Grand Junction, CO Mesa Co. United States	Falcon Way / Sunstrand Way (39.12315, -108.53169)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2009	Year Completed estimated (2006-2011).
Grand Junction, CO Mesa Co. United States	Horizon Dr. / H Rd. / Eagle Dr. (39.11827, -108.52976)	Roundabout Existing	All-Way Yield Unknown	4 Approaches 0 Driveways 60.2299	Other (At-Grade) Multilane (2 Lane, unspecified)	2009	Year Completed estimated (2006-2011). Slight elliptical shape. Right-turn bypass lane on west leg. ICD estimated from Google Maps linework.
Grand Junction, CO Mesa Co. United States	Aviators Way / Eagle Dr. (39.11972, -108.52625)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 39.6240	Other (At-Grade) Single-Lane	2009	Year Completed estimated (2006-2011).
Bozeman, MT Yellowstone Co. United States	Bench Blvd. / Hilltop Rd. / Yellowstone River Rd. (45.81289, -108.46580)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 34.1305	Other (At-Grade) Single-Lane	2013	Right-turn-only lane on south leg. ICD estimated from Google Maps linework.
Billings, MT Yellowstone Co. United States	Old US 312 / Five Mile Rd. (45.86957, -108.42768)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020	https://www.mdt.mt.gov/pubinvolve/billingsbypass/fmr.shtml
Billings, MT Yellowstone Co. United States	Five Mile Rd. / Mary St. / (Billings Bypass) (45.84863, -108.42492)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 54.8640	Other (At-Grade) Single-Lane	2021	https://www.yourbigsky.com/local-news-2/billings-bypass-project-roundabout-opening-on-november-24/
Mancos, CO Montezuma Co. United States	Ruins Rd. / (entrance to visitor center) / (service road) (37.33917, -108.41185)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2023	Entrance to Mesa Verde National Park. Year Completed estimated (2020-2023). Previous control was mix of stop and uncontrolled movements.
Farmington, NM San Juan Co. United States	W Main St. / Auburn Ave. (36.72905, -108.21064)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020
Farmington, NM San Juan Co. United States	W Main St. / Behrend Ave. (36.72906, -108.20803)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020	https://www.facebook.com/downtownfarmingtonnm/videos/main-st-phase-2-reopened-to-vehicles-on-november-24th-2020/170344904783299/
Farmington, NM San Juan Co. United States	Main St. / Orchard Ave. (36.72905, -108.20540)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 0.0000	Other (At-Grade) Single-Lane	2020	Oblong shaped. https://durangoherald.com/articles/332836
Farmington, NM San Juan Co. United States	E Main St. / S Miller Ave. (36.72910, -108.20333)	Roundabout Existing	All-Way Yield None	3 Approaches 1 Driveways 0.0000	Other (At-Grade) Single-Lane	2020
Farmington, NM San Juan Co. United States	Foothills Dr. / Rinconada St. (36.79144, -108.13909)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane	2017	Year Completed estimated (2015-2019).
Parachute, CO Garfield Co. United States	Old Hwy 6 / I-70 WB Ramps (39.42982, -108.07610)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 51.8160	Freeway Ramps (Grade-Separated) Single-Lane	2012
Parachute, CO Garfield Co. United States	Old Hwy 6 / I-70 EB Ramps / (unknown) (39.42828, -108.07440)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 57.9120	Freeway Ramps (Grade-Separated) Single-Lane	2012
Telluride, CO San Miguel Co. United States	CO-145 / CO-145 Spur (37.95036, -107.87135)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 37.6712	Other (At-Grade) Single-Lane	2013	Through bypass lane along top of T-intersection. Year Completed estimated (2011-2014). ICD estimated from Google Maps linework.
Durango, CO La Plata Co. United States	Florida Rd. / Riverview Dr. (37.28319, -107.86900)	Roundabout Existing	All-Way Yield None	3 Approaches 0 Driveways 30.4086	Other (At-Grade) Single-Lane	2010	ICD estimated from Google Maps linework.
Montrose, CO Montrose Co. United States	Ogden Rd. / Woodgate Rd. (38.45096, -107.86297)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 32.7365	Other (At-Grade) Single-Lane	2011	Year Completed estimated (2011-2012). ICD estimated from Google Maps linework.
Durango, CO La Plata Co. United States	CR 238 / Fort Lewis Dr. / College Dr. (37.27940, -107.85940)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 42.7643	Other (At-Grade) Single-Lane	2007	ICD estimated from Google Maps linework.
Montrose, CO Montrose Co. United States	Miami Rd. / Hillcrest Dr. (38.48179, -107.85677)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways	Other (At-Grade) Single-Lane	2019	https://www.cityofmontrose.org/701/Miami-Hillcrest-Roundabout-Project
Montrose, CO Montrose Co. United States	S Hillcrest Dr. / Sunnyside Rd. (38.47450, -107.85663)	Roundabout Existing	All-Way Yield None	4 Approaches 0 Driveways 15.8954	Other (At-Grade) Single-Lane	2016	date: https://www.cityofmontrose.org/CivicAlerts.aspx?AID=1235 ICD estimated from Google Maps linework.
Durango, CO La Plata Co. United States	Jenkins Ranch Rd. / Molas Dr. (37.28099, -107.85550)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 28.5089	Other (At-Grade) Single-Lane	2004	ICD estimated from Google Maps linework.
Durango, CO La Plata Co. United States	Jenkins Ranch Rd. / Ophir Dr. (37.28321, -107.85120)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 26.6075	Other (At-Grade) Single-Lane	2004	ICD estimated from Google Maps linework.
Durango, CO La Plata Co. United States	Jenkins Ranch Rd. / Lizard Head (south) (37.28605, -107.84710)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 24.7061	Other (At-Grade) Single-Lane	2004	ICD estimated from Google Maps linework.
Durango, CO La Plata Co. United States	Jenkins Ranch Rd. / Lizard Head (north) (37.28920, -107.84310)	Roundabout Existing	Unknown Unknown	3 Approaches 0 Driveways 27.5556	Other (At-Grade) Single-Lane	2004	ICD estimated from Google Maps linework.
Durango, CO La Plata Co. United States	Jenkins Ranch Rd. / Kennebec Dr. (37.29216, -107.84010)	Roundabout Existing	Unknown Unknown	4 Approaches 0 Driveways 23.7539	Other (At-Grade) Single-Lane	2003	ICD estimated from Google Maps linework.