| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| Glenwood Springs,
                CO Garfield Co. United States | Mel Ray Rd. / I-70 EB Ramps / Midland Ave. / Riverine Rd. (39.56019, -107.36139) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 46.9595 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2006 | 1 of 2 at Exit 114 on I-70, observed under construction in 2005. ICD estimated from Google Maps linework. | 
| Glenwood Springs,
                CO Garfield Co. United States | Mel Ray Rd. / I-70 WB Ramps / US 6 (39.56142, -107.36127) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 44.1965 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2006 | ICD estimated from Google Maps linework. | 
| Gypsum,
                CO Eagle Co. United States | I-70 Frontage Roads / US 6 (39.65086, -106.95510) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 53.3351 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Colorado Springs,
                CO El Paso Co. United States | Chapel Hills Dr. / Divot Trl. (38.97569, -104.77560) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 29.7116 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2002 | Functional Class: Arterial 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. | 
| 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. | |
| Eagle,
                CO Eagle Co. United States | Eby Creek Rd. / US 6 (39.65630, -106.82500) | Roundabout Existing | All-Way Yield Active Pedestrian Warning (flashing yellow) | 4 Approaches 0 Driveways 40.4579 | Other (At-Grade) Single-Lane | 2001 | Opened July 2001. Highway ref pt. 6-49.67. Previously controlled by two-way stop Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Colorado Springs,
                CO El Paso Co. United States | Chapel Hills Dr. / Royal Pine Dr. (38.98067, -104.77060) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 26.9242 | Other (At-Grade) Single-Lane | 2002 | 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. | 
| Windsor,
                CO Weld Co. United States | Westgate Dr. / Oakmond St. (40.48121, -104.98870) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 48.7680 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2020 | Year Completed estimated (2019-2021). Opened 1999-2004 as single-lane cul-de-sac with south leg and stubs on west and east legs and no evidence of traffic control; the outer portions of circulatory roadway were striped out. Converted to 2x1 roundabout 2019-2021 with addition of north leg. | 
| 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. | 
| 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. | 
| Fort Collins,
                CO Larimer Co. United States | Rigden Pkwy. / Custer Dr. (40.54863, -105.02960) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.9307 | Other (At-Grade) Single-Lane | 2001 | Date estimated. Functional Class: Local ICD estimated from Google Maps linework. | 
| 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. | |
| Fort Collins,
                CO Larimer Co. United States | Stanton Creek Dr. / Tortola Way (40.48999, -105.05430) | Traffic Calming Circle Existing | Unknown Unknown | 3 Approaches 0 Driveways 25.4327 | Other (At-Grade) Single-Lane | Functional Class: Local 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. | 
| 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. | |
| 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. | |
| 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. | |
| 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. | 
| 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. | 
| Loveland,
                CO Larimer Co. United States | Seven Lakes Dr. / Horseshoe Dr. (40.42844, -105.05100) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 20.0011 | Other (At-Grade) Single-Lane | 1996 | 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. | 
| Loveland,
                CO Larimer Co. United States | E. 13th St. / N. Denver Ave. (40.40520, -105.04480) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.7445 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2002 | Southbound approach has two-lane approach with right-turn-only lane; all other approaches are single-lane. Traffic from SuperWalMart and movie theatre go through roundabout to get to NB Denver to get to US 34/Eisenhower. Functional Class: Collector ICD estimated from Google Maps linework. | 
| Fort Collins,
                CO Larimer Co. United States | Silverwood Dr. / Centennial Rd. (40.54545, -105.05120) | Traffic Calming Circle Removed | All-Way Yield None | 4 Approaches 0 Driveways 31.7646 | Other (At-Grade) Single-Lane | Small almost mini-roundabout used for traffic calming measure. People drove through plastic posts, rendering roundabout useless; idea scrapped in less than 6 mo. Functional Class: Collector ICD estimated from Google Maps linework. | |
| Fort Collins,
                CO Larimer Co. United States | Mt. Vernon Ct. / New Bedford Dr. / Ticonderoga Dr. (40.53008, -105.05420) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 25.4175 | Other (At-Grade) Single-Lane | Small almost mini roundabout, not very functional. Has small central island and no splitter islands only haching and road markings. Functional Class: Collector ICD estimated from Google Maps linework. | |
| Colorado Springs,
                CO El Paso Co. United States | Beech Ave. / 1st St. (38.79048, -104.84660) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 42.8219 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Colorado Springs,
                CO El Paso Co. United States | Lake Ave. / Lake Cir. (38.79144, -104.84880) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 23.2724 | Other (At-Grade) Single-Lane | 1995 | Year Completed estimated (before 1999). ICD estimated from Google Maps linework. | 
| Denver,
                CO Denver Co. United States | Chopper Cir. / VIP Parking / 9th St. / Access Rd (39.74721, -105.00810) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 52.3424 | Other (At-Grade) Single-Lane | 1999 | Located at Pepsi Center arena Functional Class: Collector ICD estimated from Google Maps linework. | 
| Colorado Springs,
                CO El Paso Co. United States | Pine Manor Dr. / Stoneglen Dr. (38.96827, -104.76670) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 26.9289 | Other (At-Grade) Single-Lane | 2000 | ICD estimated from Google Maps linework. | 
| Colorado Springs,
                CO El Paso Co. United States | Windjammer Dr. / Brigantine Dr. (38.95401, -104.77020) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 32.5070 | Other (At-Grade) Single-Lane | 1995 | ICD estimated from Google Maps linework. | 
| Colorado Springs,
                CO El Paso Co. United States | Bridle Oaks Dr. / Woodmont Dr. (39.01377, -104.79950) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 64.0311 | Other (At-Grade) Single-Lane | 2005 | ICD estimated from Google Maps linework. | 
| Colorado Springs,
                CO El Paso Co. United States | Sybilla Ln. / (parking lot) (39.01263, -104.81160) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 25.9841 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Colorado Springs,
                CO El Paso Co. United States | Stout Dr. / (parking lot) (39.01775, -104.81250) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 20.4146 | Other (At-Grade) Single-Lane | 2003 | 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. | |
| Boulder,
                CO Boulder Co. United States | Evergreen Ave. / 9th St. (40.03106, -105.28560) | Traffic Calming Circle Existing | Unknown None | 4 Approaches 0 Driveways 16.4609 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Boulder,
                CO Boulder Co. United States | Kings Ridge Blvd. / Edison Ave. (40.03098, -105.23950) | Other Existing | All-Way Yield None | 3 Approaches 0 Driveways 23.7768 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Boulder,
                CO Boulder Co. United States | Kings Ridge Blvd. / Franklin Dr. (40.03237, -105.23960) | Other Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.4342 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Boulder,
                CO Boulder Co. United States | Maxwell Ave. / 6th St. (40.02176, -105.28860) | Traffic Calming Circle Existing | One-Way/Two-Way Stop None | 4 Approaches 0 Driveways 12.8046 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Boulder,
                CO Boulder Co. United States | Pearl St. / 4th St. (40.01571, -105.29050) | Traffic Calming Circle Existing | Unknown None | 4 Approaches 0 Driveways 20.1234 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Boulder,
                CO Boulder Co. United States | Pearl St. / Mid-Block (40.01501, -105.29390) | Traffic Calming Circle Existing | Unknown None | 2 Approaches 0 Driveways 16.4647 | Other (At-Grade) Single-Lane | Facilitates U-turns at west end of Pearl Street ICD estimated from Google Maps linework. | |
| Boulder,
                CO Boulder Co. United States | Pine St. / 15th St. (40.02072, -105.27670) | Traffic Calming Circle Existing | Unknown None | 4 Approaches 0 Driveways 16.4634 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Boulder,
                CO Boulder Co. United States | Pine St. / 17th St. (40.02126, -105.27410) | Traffic Calming Circle Existing | Unknown None | 4 Approaches 0 Driveways 10.9755 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Aspen,
                CO Pitkin Co. United States | SR 82 / Maroon Creek Rd. / Castle Creek Rd. (39.19557, -106.84025) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 60.9600 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2000 | |
| Littleton,
                CO Arapahoe Co. United States | Franklin St. / Cherryville Rd. (39.61832, -104.96920) | Traffic Calming Circle Existing | All-Way Yield None | 3 Approaches 0 Driveways 8.2800 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Greenwood Village,
                CO Arapahoe Co. United States | S. Monaco St. / E. Berry Ave. (39.61682, -104.91340) | Traffic Calming Circle Existing | Unknown Unknown | 3 Approaches 0 Driveways 11.9603 | Other (At-Grade) Single-Lane | 1999 | ICD estimated from Google Maps linework. | 
| Greenwood Village,
                CO Arapahoe Co. United States | S. Monaco St. / E. Dorado Ave. (39.61319, -104.91350) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 9.2007 | Other (At-Grade) Single-Lane | 1999 | ICD estimated from Google Maps linework. | 
| Greenwood Village,
                CO Arapahoe Co. United States | S. Monaco St. / E. Dorado Pl. (39.61199, -104.91350) | Traffic Calming Circle Existing | Unknown Unknown | 3 Approaches 0 Driveways 11.0410 | Other (At-Grade) Single-Lane | 1999 | ICD estimated from Google Maps linework. | 
| Greenwood Village,
                CO Arapahoe Co. United States | S. Monaco St. / E. Ida Ave. (39.61082, -104.91350) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 14.7216 | Other (At-Grade) Single-Lane | 1999 | ICD estimated from Google Maps linework. | 
| Greenwood Village,
                CO Arapahoe Co. United States | S. Monaco St. / E. Powers Ave. (39.61501, -104.91350) | Traffic Calming Circle Existing | Unknown Unknown | 4 Approaches 0 Driveways 9.2005 | Other (At-Grade) Single-Lane | 1999 | ICD estimated from Google Maps linework. | 
| Greenwood Village,
                CO Arapahoe Co. United States | S. Monaco St. / E. Prentice Pl. (39.61977, -104.91350) | Traffic Calming Circle Existing | Unknown Unknown | 3 Approaches 0 Driveways 14.7197 | Other (At-Grade) Single-Lane | 1999 | ICD estimated from Google Maps linework. | 
| Greenwood Village,
                CO Arapahoe Co. United States | Peoria St. / Cherry Creek Dr. (39.61015, -104.84800) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 25.7631 | Other (At-Grade) Single-Lane | 2000 | ICD estimated from Google Maps linework. | 
| Golden,
                CO Jefferson Co. United States | Jefferson County Pkwy. / Civic Center (39.72717, -105.19940) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 34.9051 | Other (At-Grade) Single-Lane | 2000 | Feeds parking lot 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. | 
| Northglenn,
                CO Adams Co. United States | Melody Dr. / Kennedy Dr. (39.89222, -104.99270) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.6541 | Other (At-Grade) Single-Lane | 1999 | Roundabout is single-lane except for NB approach with separate RT lane. ICD estimated from Google Maps linework. | 
| Littleton,
                CO Arapahoe Co. United States | Elati St. / Arapahoe Rd. (39.59515, -104.99770) | Traffic Calming Circle Existing | One-Way/Two-Way Stop None | 4 Approaches 0 Driveways 11.0437 | Other (At-Grade) Single-Lane | Functional Class: Collector ICD estimated from Google Maps linework. | |
| Littleton,
                CO Arapahoe Co. United States | Elati St. / Briarwood St. (39.59236, -104.99770) | Traffic Calming Circle Existing | One-Way/Two-Way Stop None | 4 Approaches 0 Driveways 5.5221 | Other (At-Grade) Single-Lane | Functional Class: Collector ICD estimated from Google Maps linework. | |
| Loveland,
                CO Larimer Co. United States | Rocky Mountain Ave. / Foxtrail Dr. (40.40924, -105.00230) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.9231 | Other (At-Grade) Multilane (2 Lane, unspecified) | 1994 | Entrance to shopping center. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Loveland,
                CO Larimer Co. United States | Rocky Mountain Ave. / McWhinney Blvd. (40.41059, -105.00230) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 43.6504 | Other (At-Grade) Multilane (2 Lane, unspecified) | 1994 | Adjacent to shopping center. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Denver,
                CO Denver Co. United States | E. Lowry Blvd. / N. Uinta Way (39.71986, -104.89070) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 50.5258 | Other (At-Grade) Multilane (2 Lane, unspecified) | 1998 | ICD estimated from Google Maps linework. | 
| Denver,
                CO Denver Co. United States | E. Lowry Blvd. / Yosemite St. (39.72373, -104.88400) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 51.4416 | Other (At-Grade) Multilane (2 Lane, unspecified) | 1998 | ICD estimated from Google Maps linework. | 
| Frisco,
                CO Summit Co. United States | SH 9 / I-70 WB Ramps (39.59339, -106.09700) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 34.0524 | Freeway Ramps (Grade-Separated) Single-Lane | 2000 | Highway ref. pt. 70-202.35. ICD estimated from Google Maps linework. | 
| Golden,
                CO Jefferson Co. United States | S. Golden Rd. / Johnson Rd. / 16th St. (39.74207, -105.20060) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 37.6526 | Other (At-Grade) Multilane (2 Lane, unspecified) | 1998 | Documented in 2002 ITE District 6 Annual Meeting Compendium of Papers. Serves retail shopping corridor. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Golden,
                CO Jefferson Co. United States | S. Golden Rd. / Lunnonhaus Dr. (39.74062, -105.19840) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.0040 | Other (At-Grade) Multilane (2 Lane, unspecified) | 1998 | Documented in 2002 ITE District 6 Annual Meeting Compendium of Papers. Serves retail shopping corridor. Small two-lane roundabout but with nontraversable central island. | 
| Golden,
                CO Jefferson Co. United States | S. Golden Rd. / Utah St. (39.73919, -105.19620) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 23.8782 | Other (At-Grade) Multilane (2 Lane, unspecified) | 1998 | Documented in 2002 ITE District 6 Annual Meeting Compendium of Papers. Serves retail shopping corridor. Previously controlled by two-way stop Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Golden,
                CO Jefferson Co. United States | S. Golden Rd. / Ulysses St. (39.73771, -105.19390) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.5734 | Other (At-Grade) Single-Lane | 1998 | Documented in 2002 ITE District 6 Annual Meeting Compendium of Papers. Serves retail shopping corridor. Main entrance to shopping center. Functional Class: Arterial 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. | 
| Loveland,
                CO Larimer Co. United States | McWhinney Blvd. / Hahns Peak Dr. / Grays Peak Dr. (40.41048, -105.01140) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 71.6280 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2002 | |
| Greeley,
                CO Weld Co. United States | Promontory Cir. / W. 16th St. (40.41505, -104.85090) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.6720 | Other (At-Grade) Multilane (2 Lane, 2x2 max) | 2004 | 4 roundabouts in series; 6 in vicinity. | 
| Greeley,
                CO Weld Co. United States | Promontory Cir. / Con Agra Dr. (40.41138, -104.85200) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 42.6720 | Other (At-Grade) Multilane (2 Lane, 2x2 max) | 2004 | 4 roundabouts in series; 6 in vicinity. | 
| Loveland,
                CO Larimer Co. United States | Plum Creek Dr. / Piney River Dr. (40.41253, -105.01850) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 29.0994 | Other (At-Grade) Single-Lane | 2001 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Greeley,
                CO Weld Co. United States | Promontory Cir. / W 11th St. (40.41889, -104.84990) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 44.1960 | Other (At-Grade) Multilane (2 Lane, 2x2 max) | 2004 | 4 roundabouts in series; 6 in vicinity. | 
| Greeley,
                CO Weld Co. United States | W 18th St. / Promontory Cir. / (parking) (40.41203, -104.85840) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 42.6720 | Other (At-Grade) Multilane (2 Lane, 2x2 max) | 2004 | Part of 6 in vicinity. | 
| Greeley,
                CO Weld Co. United States | Promontory Cir. / W 18th St. (40.40869, -104.85120) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 42.6717 | Other (At-Grade) Multilane (2 Lane, 2x2 max) | 2004 | 4 roundabouts in series; 6 in vicinity. | 
| Bayfield,
                CO La Plata Co. United States | CR 501 / Bayfield Center Dr. (37.23393, -107.60191) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 41.1480 | Other (At-Grade) Single-Lane | 2001 | Bayfield Center Drive is a new roadway. Completed Fall 2001. | 
| Greeley,
                CO Weld Co. United States | Promontory Cir. / W 16th St. / (parking) (40.41524, -104.85540) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.6720 | Other (At-Grade) Multilane (2 Lane, 2x2 max) | 2004 | Part of 6 in vicinity. | 
| (unincorporated),
                CO Douglas Co. United States | Ridgegate Pkwy. / Ridgegate Cir. / Commons St. (39.53187, -104.88300) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 53.4267 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2006 | Part of transit-oriented development near future light-rail station ICD estimated from Google Maps linework. | 
| (unincorporated),
                CO Douglas Co. United States | Ridgegate Pkwy. / Ridgegate Cir. / Park Meadows Blvd. (39.52945, -104.87450) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 54.3498 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2006 | Part of transit-oriented development near future light-rail station 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 | Wilson Gulch Dr. / Three Springs Blvd. (37.23339, -107.82310) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 51.8160 | Other (At-Grade) Multilane (2 Lane, 2x2 max) | 2006 | |
| 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. | 
| 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. | 
| Durango,
                CO La Plata Co. United States | (Mercy Regional Medical Center ring road) / (unknown) (37.23677, -107.82050) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 34.2308 | Other (At-Grade) Single-Lane | 2006 | 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. | 
| 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. | 
| Vail,
                CO Eagle Co. United States | Vail Rd. / I-70 WB Ramps / North Frontage Rd. / Spraddle Cr. Rd. (39.64477, -106.37770) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.5760 | Other (At-Grade) Multilane (2 Lane, unspecified) | 1995 | Raindrop-shaped central island. | 
| Vail,
                CO Eagle Co. United States | Vail Rd. / I-70 EB Ramps / South Frontage Rd. (39.64355, -106.37810) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 59.4360 | Other (At-Grade) Multilane (2 Lane, 2x2 max) | 1995 | Completed October 1995. Circular central island. | 
| Vail,
                CO Eagle Co. United States | Chamonix Rd. / I-70 WB Ramps / North Frontage Rd. (39.62828, -106.42120) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 45.7200 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max) | 1997 | |
| Vail,
                CO Eagle Co. United States | Chamonix Rd. / I-70 EB Ramps / South Frontage Rd. (39.62753, -106.42020) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 45.7200 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x1 max) | 1997 | |
| Avon,
                CO Eagle Co. United States | Avon Rd. / I-70 WB Ramps (39.63782, -106.52080) | Roundabout Existing | All-Way Yield Active Pedestrian Warning (flashing yellow) | 3 Approaches 0 Driveways 42.6720 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max) | 1997 | Highway ref. pt. 70-166.62. Raindrop shaped. | 
| Avon,
                CO Eagle Co. United States | Avon Rd. / I-70 EB Ramps (39.63683, -106.52170) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 44.1960 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max) | 1997 | Highway ref. pt. 70-166.62. Raindrop shaped. | 
| Avon,
                CO Eagle Co. United States | Avon Rd. / Beaver Creek Blvd. (39.63528, -106.52220) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 68.5800 | Other (At-Grade) Multilane (2 Lane, 2x2 max) | 1997 | Right-turn-only lane on north leg. Elliptical shaped. Skewed intersection. ICD = 225 ft x 160 ft. | 
| Avon,
                CO Eagle Co. United States | Avon Rd. / Benchmark Rd. (39.63425, -106.52220) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Multilane (2 Lane, 2x2 max) | 1997 | Originally had raindrop shape with locked gate access across south leg for emergency vehicles only. Redesigned and reopened May 2007 with full access. 21442 | 
| Avon,
                CO Eagle Co. United States | Avon Rd. / US 6 (39.63110, -106.52260) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Multilane (2 Lane, 2x2 max) | 1997 | Highway ref. pt. 6-170.04. Right-turn-only lane on east leg. | 
| Nederland,
                CO Boulder Co. United States | SH 72 / SH 119 / 2nd St. / Bridge St. (39.96261, -105.51030) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 23.8006 | Other (At-Grade) Single-Lane | 1995 | Opened June 1995. Previously controlled by two-way stop Functional Class: Arterial 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. |