| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| Edgewater,
                CO Jefferson Co. United States | W 20th Ave. / Benton St. (39.74763, -105.05562) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.4800 | Other (At-Grade) Single-Lane | 2022 | Elliptical shaped. ICD = 100 ft x 85 ft. | 
| Fort Collins,
                CO Larimer Co. United States | Stanton Creek Dr. / St. Thomas Dr. (40.49066, -105.05590) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 24.5241 | Other (At-Grade) Single-Lane | Functional Class: Local ICD estimated from Google Maps linework. | |
| Erie,
                CO Weld Co. United States | CW Bixler Blvd. / Washburn St. (40.06230, -105.05650) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 20.1096 | Other (At-Grade) Unknown | ICD estimated from Google Maps linework. | |
| Longmont,
                CO Boulder Co. United States | Deerwood Dr. / Summer Hawk Dr. (40.17087, -105.05720) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 25.5532 | Other (At-Grade) Single-Lane | 2003 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Seven Lakes Dr. / Madison Ave. (40.42698, -105.05790) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 18.1832 | Other (At-Grade) Single-Lane | 1995 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Longmont,
                CO Boulder Co. United States | Deerwood Dr. / Stardance Cir. (40.16962, -105.06120) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 22.8158 | Other (At-Grade) Single-Lane | 2003 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Finch St. / Finch Pl. (40.38717, -105.06164) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 15.4649 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| 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. | 
| Littleton,
                CO Jefferson Co. United States | S Platte Canyon Rd. / S Kendall Blvd. / W Chatfield Ave. (39.56787, -105.06207) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 31.3029 | Other (At-Grade) Single-Lane | 2018 | Merging right-turn bypass lanes on west and south legs. Year Completed estimated (2017-2018). ICD estimated from Google Maps linework. | 
| Edgewater,
                CO Jefferson Co. United States | W 20th Ave. / Harlan St. (39.74762, -105.06264) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2022 | https://edgewaterecho.com/2022/01/new-roundabout-at-20th-and-harlan-opening-tuesday-february-1/ | 
| Longmont,
                CO Boulder Co. United States | Deerwood Dr. / Windflower Dr. (40.17093, -105.06300) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 25.5532 | Other (At-Grade) Single-Lane | 2003 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Westminster,
                CO Adams Co. United States | Promenade Dr. S. / (TBD) (39.89188, -105.06330) | Traffic Calming Circle Existing | Unknown Unknown | 2 Approaches 0 Driveways 20.1598 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| 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 | Deerwood Dr. / Bluefield Ave. (40.17346, -105.06460) | Traffic Calming Circle Existing | Unknown Unknown | 0 Approaches 0 Driveways 26.4648 | Other (At-Grade) Single-Lane | 2002 | Functional Class: Local ICD estimated from Google Maps linework. | 
| 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). | 
| 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). | 
| Lakewood,
                CO Jefferson Co. United States | Lamar St. / W 14th Ave. (39.73850, -105.06733) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.4800 | Other (At-Grade) Single-Lane | 2014 | Fire station driveway at end of radius on northwest corner. | 
| Loveland,
                CO Larimer Co. United States | Monroe Ave. / E 37th St. (40.43012, -105.06809) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 44.5469 | Other (At-Grade) Single-Lane | 2019 | Opened to traffic October 18, 2019. ICD estimated from Google Maps linework. | 
| Edgewater,
                CO Jefferson Co. United States | Pierce St. / W 24th Ave. (39.75123, -105.07204) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2022 | https://edgewaterecho.com/2022/03/new-roundabout-open-at-24th-avenue-and-pierce-street/ | 
| Denver,
                CO Jefferson Co. United States | S Reed St. / S Pierce Way (39.68087, -105.07380) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.5280 | Other (At-Grade) Single-Lane | 2017 | Year Completed estimated (2017-2018). | 
| Berthoud,
                CO Larimer Co. United States | 1st St. / Mountain Ave. / CR 8-CR 56 (40.30540, -105.07433) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.6997 | Other (At-Grade) Single-Lane | 2010 | Year Completed estimated (2008-2011). ICD estimated from Google Maps linework. | 
| Westminster,
                CO Jefferson Co. United States | Circle Point Rd. (39.89729, -105.07433) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | Pedestrian access to central island. | |
| Fort Collins,
                CO Larimer Co. United States | E Willox Ln. / (parking lots) (40.61064, -105.07447) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.9203 | Other (At-Grade) Single-Lane | 2010 | Year Completed estimated (2009-2011). ICD estimated from Google Maps linework. | 
| 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). | 
| University Park,
                CO Larimer Co. United States | E Laurel St. / Remington St. (40.57810, -105.07559) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.9080 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2015 | Year Completed estimated (2014-2016). | 
| Westminster,
                CO Jefferson Co. United States | Reed St. / Promenade Dr. / (parking lot) (39.88726, -105.07719) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.7403 | Other (At-Grade) Single-Lane | 2004 | Wapiti Circle (statue of small elk herd) installed in center island in 2005 -- https://www.waymarking.com/waymarks/WMDRJH_Wapiti_Circle_Westminster_CO . ICD estimated from Google Maps linework. | 
| Fort Collins,
                CO Larimer Co. United States | College Ave. / Laporte Ave. (40.58899, -105.07720) | Other Removed | Unknown Unknown | 4 Approaches 0 Driveways 26.3021 | Other (At-Grade) Multilane (2 Lane, unspecified) | Functional Class: Arterial ICD estimated from Google Maps linework. | |
| Denver,
                CO Jefferson Co. United States | S Upham St. / S Evans Ave. (39.67841, -105.07776) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 33.5280 | Other (At-Grade) Single-Lane | 2016 | |
| Loveland,
                CO Larimer Co. United States | N Garfield Ave. / W 7th St. (40.39864, -105.07792) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 15.4623 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2016 | ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Harrison Ave. / W 65th St. (40.45845, -105.08018) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.9844 | Other (At-Grade) Single-Lane | 2011 | Right-turn bypass lane on east leg. ICD estimated from Google Maps linework. | 
| Fort Collins,
                CO Larimer Co. United States | Oval Dr. (Howes St. / Plum St. / Isotope Dr. / East Dr. / Music Dr.) (40.57639, -105.08070) | Other Existing | Unknown Unknown | 6 Approaches 0 Driveways 19.0499 | Other (At-Grade) Single-Lane | Functional Class: Local ICD estimated from Google Maps linework. | |
| Lakewood,
                CO Jefferson Co. United States | S. Allison Pkwy. / W. Virginia Ave. (39.70705, -105.08390) | Roundabout Existing | All-Way Yield None | 4 Approaches 1 Driveways 33.9964 | Other (At-Grade) Single-Lane | 2000 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Longmont,
                CO Boulder Co. United States | Harvest Moon Dr. / (parking) / (unknown) (40.15101, -105.08420) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.1480 | Other (At-Grade) Single-Lane | 2023 | Right-turn-only lane and two-lane exit on north leg. Year Completed estimated (2022-2023). | 
| 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. / Saratoga Dr. (39.98211, -105.08539) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | ||
| Lakewood,
                CO Jefferson Co. United States | Allison Pkwy. / Civic Center (39.70906, -105.08630) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 31.2390 | Other (At-Grade) Single-Lane | 1999 | ICD estimated from Google Maps linework. | 
| 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). | 
| 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 | ||
| 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 | |
| Quail,
                CO Boulder Co. United States | Boston Ave. / Junction Dr. (40.14998, -105.09200) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 28.9560 | Other (At-Grade) Single-Lane | 2017 | Year Completed estimated (2016-2017). | 
| Quail,
                CO Boulder Co. United States | Boston Ave. / (parking) (40.15114, -105.09285) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.1000 | Other (At-Grade) Single-Lane | 2006 | Right-turn-only lane on north leg. Year Completed estimated (2005-2006). South leg added 2016-2017. | 
| Quail,
                CO Boulder Co. United States | Boston Ave. (S. Martin St.) / (parking) (40.15350, -105.09292) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2007 | Oval shaped. ICD = 170 feet x 130 feet. Northbound left-turn-only lane signed but not marked on approach. Year Completed estimated (2006-2007). | 
| Berthoud,
                CO Larimer Co. United States | N Berthoud Pkwy. / Grand Market Ave. / Urban Pl. (40.33801, -105.09346) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 44.6078 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2018 | Year Completed estimated (2018-2019). ICD estimated from Google Maps linework. | 
| Berthoud,
                CO Larimer Co. United States | N Berthoud Pkwy. / Woodcock St. (40.34689, -105.09527) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 36.4098 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2017 | Fourth approach stubbed. Year Completed estimated (2016-2017). ICD estimated from Google Maps linework. | 
| Fort Collins,
                CO Larimer Co. United States | W Vine Dr. / N Shields St. (40.59630, -105.09579) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 37.1817 | Other (At-Grade) Single-Lane | 2015 | Streetview shows it under construction in Jul 2015. ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Taft Farms Pl. / Rangeland Ave. (40.44756, -105.09726) | Traffic Calming Circle Existing | All-Way Yield None | 3 Approaches 0 Driveways 59.0775 | Other (At-Grade) Single-Lane | 2005 | ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Redmesa Ave. / Egnar St. (40.44530, -105.10048) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 25.9080 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2020 | |
| Fort Collins,
                CO Larimer Co. United States | US 287-SR 14 / US 287 Business (40.62610, -105.10657) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 59.8267 | Other (At-Grade) Single-Lane | 2019 | https://www.coloradoan.com/story/news/2019/05/13/highway-287-construction-project-north-fort-collins-cdot/1189772001/ ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Glen Isle Dr. / Buckingham Cir. (40.43580, -105.10680) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 64.5421 | Other (At-Grade) Single-Lane | 1997 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Lakewood,
                CO Jefferson Co. United States | W Dartmouth Pl. / W Cornell Pl. / (high school access) (39.66034, -105.10813) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 31.2611 | Other (At-Grade) Single-Lane | 2006 | https://www.denverpost.com/2006/08/03/on-the-side-84/ . ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Glen Isle Dr. / Glendale Dr. (40.43433, -105.11460) | Other Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 27.4320 | Other (At-Grade) Single-Lane | 1995 | No splitter islands on side street. | 
| Fort Collins,
                CO Larimer Co. United States | W Vine Dr. / N Taft Hill Rd. (40.59652, -105.11480) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 31.7403 | Other (At-Grade) Single-Lane | 2007 | Year Completed estimated (2006-2007). ICD estimated from Google Maps linework. | 
| Fort Collins,
                CO Larimer Co. United States | N Taft Hill Rd. / CR 70 / CR 19 (40.75500, -105.11504) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 1 Driveways 37.0933 | Other (At-Grade) Single-Lane | 2015 | Year Completed estimated (2014-2016). ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Wilson Ave. / Melissa Dr. (40.37793, -105.11596) | Traffic Calming Circle Existing | All-Way Yield None | 3 Approaches 0 Driveways 17.2867 | Other (At-Grade) Single-Lane | 2005 | Year Completed estimated (2004-2005). ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Rodin Dr. / Da Vinci Dr. (40.44219, -105.11912) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.9080 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2020 | |
| Loveland,
                CO Larimer Co. United States | New Castle Dr. / Tabernash Dr. (40.42599, -105.12010) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 24.5477 | Other (At-Grade) Single-Lane | 2000 | ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Tacanecy Dr. / Marcy Dr. (40.39230, -105.12140) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 29.1082 | Other (At-Grade) Single-Lane | 1995 | ICD estimated from Google Maps linework. | 
| 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). | 
| 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). | 
| Loveland,
                CO Larimer Co. United States | Rio Blanco Ave. / Parlin St. (40.41231, -105.12560) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 25.4621 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Nucla Ave. / Parlin St. / Parlin Ct. (40.41230, -105.12657) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 24.5527 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Tiger Ave. / Angora Dr. (40.37680, -105.12750) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 28.2050 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Columbine,
                CO Jefferson Co. United States | S. Simms St. / W. Quincy Ave. (39.63865, -105.12860) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 34.0301 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2002 | ICD estimated from Google Maps linework. | 
| Columbine,
                CO Jefferson Co. United States | S. Simms St. / Nelson St. (39.64159, -105.12910) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 38.6271 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2003 | Right turn bypass lanes on three legs. ICD estimated from Google Maps linework. | 
| 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 | |
| Berthoud,
                CO Larimer Co. United States | CR 8 / CR 21 (40.30512, -105.13134) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.1480 | Other (At-Grade) Single-Lane | 2023 | https://www.larimer.gov/sites/default/files/2023-safety-report-final-20240806.pdf (page 20) | 
| Fort Collins,
                CO Larimer Co. United States | Tierra Ln. / Saddle Ridge Condominiums (40.57545, -105.13140) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 28.1217 | Other (At-Grade) Single-Lane | Functional Class: Local ICD estimated from Google Maps linework. | |
| Loveland,
                CO Larimer Co. United States | W 1st St. / Crestone Dr. / CR 21 (40.39286, -105.13140) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 26.0604 | Other (At-Grade) Single-Lane | 2020 | https://nextdoor.com/agency-post/co/loveland/city-of-loveland/residents-advised-to-plan-alternate-route-for-2-week-closure-at-1st-street-crestone-dr-163995294/ | 
| Loveland,
                CO Larimer Co. United States | Crestone Dr. / Foothills Dr. (40.39717, -105.13149) | Other Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 24.3840 | Other (At-Grade) Single-Lane | 1997 | Painted splitter islands; unmarked pedestrian crossings along circulatory roadway. | 
| Broomfield,
                CO Adams Co. United States | Zang St. / (parking lot #2) (39.92641, -105.13170) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 35.7199 | Other (At-Grade) Single-Lane | 2001 | Serves commercial development. ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Monte Vista Dr. East / W. 22nd St. (40.41451, -105.13180) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 24.5519 | Other (At-Grade) Single-Lane | 2000 | ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Monte Vista Dr. West / W. 22nd St. (40.41449, -105.13290) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 26.3706 | Other (At-Grade) Single-Lane | 2000 | ICD estimated from Google Maps linework. | 
| Littleton,
                CO Jefferson Co. United States | S Union Ct. / S Ida Ave. (39.61175, -105.13316) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 34.0433 | Other (At-Grade) Single-Lane | 2006 | ICD estimated from Google Maps linework. | 
| Broomfield,
                CO Adams Co. United States | Zang St. / (parking lot #1) (39.92782, -105.13320) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 36.6350 | Other (At-Grade) Single-Lane | 2001 | Serves commercial development. ICD estimated from Google Maps linework. | 
| Fort Collins,
                CO Larimer Co. United States | Cuerto Ln. / (unknown) (40.57718, -105.13330) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 26.3067 | Other (At-Grade) Single-Lane | 2005 | Functional Class: Local ICD estimated from Google Maps linework. | 
| 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). | 
| Loveland,
                CO Larimer Co. United States | Scenic Dr. / Foothills Dr. (40.39674, -105.13522) | Other Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 24.3840 | Other (At-Grade) Single-Lane | 1998 | Painted splitter islands; unmarked pedestrian crossings along circulatory roadway. | 
| Loveland,
                CO Larimer Co. United States | Scenic Dr. / Lookout Dr. (40.39773, -105.13528) | Other Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 24.3840 | Other (At-Grade) Single-Lane | 1998 | Painted splitter islands; unmarked pedestrian crossings along circulatory roadway. | 
| Loveland,
                CO Larimer Co. United States | Rossum Dr. / Mariana Hills Cir. / Mariana Ridge Ct. (40.40225, -105.14134) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | 2017 | |
| Littleton,
                CO Jefferson Co. United States | S Zang St. / Robert Easton Park (39.60735, -105.14731) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 27.6044 | Other (At-Grade) Single-Lane | 2006 | 3rd leg added around 2012, Built for future 4th Leg. ICD estimated from Google Maps linework. | 
| Lakewood,
                CO Jefferson Co. United States | Arbutus Dr. / W. 2nd Pl. (39.71649, -105.14750) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 27.5609 | Other (At-Grade) Single-Lane | 2001 | Functional Class: Collector ICD estimated from Google Maps linework. | 
| Superior,
                CO Boulder Co. United States | Rock Creek Pkwy. / 88th St. (39.93764, -105.14780) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 47.6187 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2004 | ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Rossum Dr. / Cedar Valley Dr. / St. Andrews Dr. (40.40005, -105.14791) | Traffic Calming Circle Existing | All-Way Yield None | 4 Approaches 0 Driveways 20.0096 | Other (At-Grade) Single-Lane | No splitter islands. Completed before 1999. ICD estimated from Google Maps linework. | |
| Lakewood,
                CO Jefferson Co. United States | Arbutus Dr. / Red Rocks Community College (39.71903, -105.14840) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.7465 | Other (At-Grade) Single-Lane | 2001 | Functional Class: Collector ICD estimated from Google Maps linework. | 
| Arvada,
                CO Jefferson Co. United States | W 87th Pkwy. / Beech St. (39.85567, -105.15060) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 31.1725 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Cedar Valley Dr. / Deer Meadow Dr. (40.40159, -105.15175) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 27.2852 | Other (At-Grade) Single-Lane | 2003 | Year Completed estimated (1999-2004). ICD estimated from Google Maps linework. | 
| Whisper Creek,
                CO Jefferson Co. United States | W 87th Dr. / W 87th Terrace (39.85449, -105.15278) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Dakota Ridge,
                CO Jefferson Co. United States | W Belleview Ave. / Quincy Ave. (39.62415, -105.15506) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2007 | Right-turn bypass lanes on north and east legs. | 
| Applewood,
                CO Jefferson Co. United States | W. 32nd Ave. / Eldridge St. (39.76180, -105.15660) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 29.3790 | Other (At-Grade) Single-Lane | 2005 | North leg serves golf course parking lot. ICD estimated from Google Maps linework. | 
| Arvada,
                CO Jefferson Co. United States | Ellis St. / W 89th Loop / W 89th Pl. (39.85736, -105.15782) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 34.8391 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Whisper Creek,
                CO Jefferson Co. United States | W 87th Dr. / W 87th Ln. (39.85326, -105.15802) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Arvada,
                CO Jefferson Co. United States | W 87th Pkwy. / Ellis St. (39.85537, -105.15826) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 32.0895 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Arvada,
                CO Jefferson Co. United States | W 87th Dr. / W 87th Pkwy. / W 88th Loop (39.85512, -105.16070) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.0896 | Other (At-Grade) Single-Lane | 2008 | 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. / 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 | 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. | 
| 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 | |
| Lakewood,
                CO Jefferson Co. United States | S Indiana St. / W Wesley Ave. (39.67204, -105.16890) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 33.0944 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Arvada,
                CO Jefferson Co. United States | W 66th Ave. / W 66th Dr. (39.81516, -105.17026) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.6867 | Other (At-Grade) Single-Lane | 2007 | Located 35 feet from adjacent stop-controlled intersection. No buffers between sidewalk and circulatory roadway. ICD estimated from Google Maps linework. |