Roundabouts Database

30066 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
Highlands Ranch, CO
Douglas Co.
United States 		Park Central Dr.
(39.55360, -105.00475) 		Other
Existing 		Unknown
Unknown 		5 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		Parking along circulatory roadway. Pedestrian access to central island.
Meridian Inernational Business Center, CO
Douglas Co.
United States 		Tall Oaks St. / Bristleridge Dr.
(39.53104, -104.82951) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Murphy Creek, CO
Arapahoe Co.
United States 		E Florida Ave.
(39.68958, -104.70061) 		Other
Existing 		Unknown
Unknown 		2 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Littleton, CO
Douglas Co.
United States 		Eagle River St. / Blue River Ave.
(39.50434, -105.03678) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
27.4320 		Other (At-Grade)
Single-Lane 		2017
Littleton, CO
Douglas Co.
United States 		Eagle River St. / Williamsburg St.
(39.50250, -105.03622) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
27.4320 		Other (At-Grade)
Single-Lane 		2017 Year Completed estimated (2017-2018).
Littleton, CO
Douglas Co.
United States 		Middle Fork St. / Garden City Ave.
(39.49889, -105.04348) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
27.4320 		Other (At-Grade)
Single-Lane 		2018 Year Completed estimated (2017-2018).
Littleton, CO
Douglas Co.
United States 		Middle Fork St. / Mt Jackson St.
(39.49687, -105.04533) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
27.4320 		Other (At-Grade)
Single-Lane 		2018 Year Completed estimated (2017-2018).
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.
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
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).
Harvest Park, CO
Larimer Co.
United States 		Old Mill Rd. / County Fair Ln.
(40.51291, -105.02753) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
38.1000 		Other (At-Grade)
Single-Lane 		2003 Painted splitter islands. Year Completed estimated (1999-2005).
Harvest Park, CO
Larimer Co.
United States 		Corbett Dr. / County Fair Ln.
(40.51292, -105.02375) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
38.1000 		Other (At-Grade)
Single-Lane 		2003 Painted splitter islands. Year Completed estimated (1999-2005).
Harvest Park, CO
Larimer Co.
United States 		Corbett Dr. / Rock Creek Dr.
(40.51549, -105.02378) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
38.1000 		Other (At-Grade)
Single-Lane 		2003 Painted splitter islands. Year Completed estimated (1999-2005).
Harvest Park, CO
Larimer Co.
United States 		Rock Creek Dr. / Old Mill Rd.
(40.51549, -105.02751) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
38.1000 		Other (At-Grade)
Single-Lane 		2003 Painted splitter islands. Year Completed estimated (1999-2005).
Brighton, CO
Adams Co.
United States 		Cherry Blossom Dr. / Willow Oak St. / N Golden Eagle Pkwy.
(39.99599, -104.74341) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
30.4800 		Other (At-Grade)
Single-Lane 		2018
Brighton, CO
Adams Co.
United States 		Longs Peak St. / N Golden Eagle Pkwy.
(39.99224, -104.74163) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
30.4800 		Other (At-Grade)
Single-Lane 		2018 South leg stubbed. Year Completed estimated (2018-2019).
Lochbuie, CO
Weld Co.
United States 		Fletcher Ave. / King St.
(40.00386, -104.74235) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Lochbuie, CO
Weld Co.
United States 		Fletcher Ave. / Jewel St.
(40.00385, -104.74486) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands on three legs.
Lochbuie, CO
Weld Co.
United States 		Flatcher Ave. / Freestone St.
(40.00392, -104.74903) 		Other
Existing 		Uncontrolled
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands on side street.
Lochbuie, CO
Weld Co.
United States 		Fletcher Ave. / Cable St.
(40.00339, -104.75180) 		Other
Existing 		Uncontrolled
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter island on side street.
Lochbuie, CO
Weld Co.
United States 		Jade Ave. / Cable St.
(40.00670, -104.75191) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter island on side street.
Brighton, CO
Adams Co.
United States 		Cisne Cir. / Goldfinch St.
(39.98653, -104.74396) 		Other
Existing 		Unknown
Unknown 		3 Approaches
1 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Brighton, CO
Adams Co.
United States 		Killdeer St. / Pelican Ave.
(39.98524, -104.74270) 		Other
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Brighton, CO
Adams Co.
United States 		Park Place Dr. / Donna St.
(39.97846, -104.79810) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane
Dotsero, CO
Eagle Co.
United States 		Colorado River Rd. / US 6 / I-70 Frontage Rd. / I-70 WB On-Ramp
(39.64841, -107.06570) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
45.7200 		Freeway Ramps (Grade-Separated)
Single-Lane 		2013 Year Completed estimated (2011-2015).
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
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
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
Weld Co.
United States 		Colliers Blvd. / Colliers Pkwy. / Orion Cir.
(40.04713, -105.03536) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2014 Year Completed estimated (2013-2014).
Thornton, CO
Adams Co.
United States 		Elizabeth Circle
(39.98312, -104.95660) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown 		Pedestrian access to central island.
Thornton, CO
Adams Co.
United States 		E 142nd Dr. / Adams St. / St Paul St.
(39.95444, -104.94953) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
33.5280 		Other (At-Grade)
Single-Lane 		2006
Thornton, CO
Adams Co.
United States 		E 138th Ave. / Jersey St.
(39.94800, -104.91939) 		Other
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown
Thornton, CO
Adams Co.
United States 		E 138th Ave. / Lilac St.
(39.94771, -104.91419) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Unknown
Thornton, CO
Adams Co.
United States 		E 141st Ave. / Forest St.
(39.95341, -104.92769) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
32.0040 		Other (At-Grade)
Single-Lane 		2017 Year Completed estimated (2015-2017).
Thornton, CO
Adams Co.
United States 		E 145th Ave. / Fairfax Dr.
(39.95991, -104.92845) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
33.5280 		Other (At-Grade)
Single-Lane 		2019 Year Completed estimated (2018-2019).
Thornton, CO
Adams Co.
United States 		E 122nd Ave. / Roslyn St.
(39.91776, -104.90064) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
41.1480 		Other (At-Grade)
Single-Lane 		2006 Year Completed estimated (2005-2006).
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/
Castle Rock, CO
Douglas Co.
United States 		E Montaine Cir. / Quarry Mesa Dr.
(39.32630, -104.85197) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
42.6720 		Other (At-Grade)
Single-Lane 		2023
Black Forest, CO
El Paso Co.
United States 		SR 50 (Walker Rd.) / Jane Lundeen Dr.
(39.09974, -104.76828) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
54.8637 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2023 Double left turn on south leg. Right-turn-only on west leg.
Colorado Springs, CO
El Paso Co.
United States 		Meridian Sol Dr. / Swingline Rd.
(38.93013, -104.60820) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
39.6240 		Other (At-Grade)
Single-Lane 		2022 Elliptical shaped. ICD = 130 ft x 105 ft.
Colorado Springs, CO
El Paso Co.
United States 		Meadow Brook Pkwy. / Newt Dr.
(38.84432, -104.69242) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
27.4317 		Other (At-Grade)
Single-Lane 		2023
Fort Collins, CO
Larimer Co.
United States 		E Mulberry Street Frontage Rd. / Greenfield Dr.
(40.58247, -105.01497) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2024
Timnath, CO
Larimer Co.
United States 		Buss Grove Rd. (CR 40) / Timnath Pkwy.
(40.53741, -104.97702) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
57.9120 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2024
Timnath, CO
Larimer Co.
United States 		2nd Ave. / Signal Tree Dr.
(40.52405, -104.97700) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
39.6240 		Other (At-Grade)
Single-Lane 		2020
Timnath, CO
Larimer Co.
United States 		Weitzel St. / Swetsville Zoo Rd.
(40.51930, -104.98815) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
48.7680 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2022 Year Completed estimated (2021-2023).
Greeley, CO
Weld Co.
United States 		W F St. / N 35th Ave.
(40.44090, -104.73501) 		Roundabout
Existing 		All-Way Yield
At-grade Rail Crossing Signals/Gates (controlling approach only) 		4 Approaches
0 Driveways
38.1000 		Other (At-Grade)
Single-Lane 		2022 Right-turn-only lane and two-lane exit on south leg. At-grade rail crossing approximately 260 feet to north. Year Completed estimated (2021-2023).
Greeley, CO
Weld Co.
United States 		W C St. / N 35th Ave.
(40.43739, -104.73495) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
47.2440 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2022 Year Completed estimated (2021-2023).
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)
Estes Park, CO
Larimer Co.
United States 		US 36 (N Saint Vrain Ave.) / Community Dr.
(40.37449, -105.49980) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
48.7680 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2022 Year Completed estimated (2019-2024).
Estes Park, CO
Larimer Co.
United States 		US 36 / US 34 Business / Crags Dr.
(40.37248, -105.52360) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2022 Elliptical shaped. Replaced two two-way stop-controlled intersections. ICD = 120 ft x 95 ft. Year Completed estimated (2019-2024).
Johnstown, CO
Weld Co.
United States 		SH 60 / Gateway Cir.
(40.33527, -104.98559) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
59.4360 		Other (At-Grade)
Multilane (2 Lane, 2x2 max) 		2024 Primary access to large travel and fuel center. Year Completed estimated (2023-2024).
La Salle, CO
Weld Co.
United States 		CR 44 / US 85 SB Ramps
(40.30821, -104.74948) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
53.3400 		Freeway Ramps (Grade-Separated)
Single-Lane 		2024 https://www.9news.com/article/traffic/us-85-colorado-new-interchange/73-2b7e4e5d-a889-4452-8d39-477c814991d0
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).
Lochbuie, CO
Adams Co.
United States 		E 168th Ave. / Frontage Rd.
(40.00051, -104.71769) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
51.8160 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2020 Ellipitcal shaped. ICD = 170 ft x 140 ft.
Broomfield, CO
Adams Co.
United States 		W 122nd Ave. / N Park Centre Dr.
(39.92089, -105.01002) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2002 North leg stubbed. Year Completed estimated (2001-2003).
Thornton, CO
Adams Co.
United States 		Washington Center Pkwy. / Lafayette St.
(39.91876, -104.97204) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
45.7200 		Other (At-Grade)
Single-Lane 		2002 Year Completed estimated (1999-2002).
Thornton, CO
Adams Co.
United States 		Riverdale Rd. / Quebec St.
(39.91040, -104.90320) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
35.0520 		Other (At-Grade)
Single-Lane 		2018
Westminster, CO
Adams Co.
United States 		W 117th Ave. / Quitman St.
(39.90885, -105.04229) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2005
Aurora, CO
Arapahoe Co.
United States 		Copperleaf Blvd. / Radcliff Pkwy.
(39.63537, -104.72624) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
54.8640 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2022 Year Completed estimated (2022-2023).
Evergreen, CO
Clear Creek Co.
United States 		US 40 / Homestead Rd. / I-70 WB Entrance Ramp
(39.72195, -105.40944) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
0.0000 		Freeway Ramps (Grade-Separated)
Single-Lane 		2024 Through bypass lane on east leg. Year Completed estimated (2023-2024). https://www.codot.gov/projects/i70floydhill/earlyprojects.
(unincorporated), CO
Jefferson Co.
United States 		US 40 / CR 65 / I-70 WB Exit Ramp
(39.71621, -105.39166) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
0.0000 		Freeway Ramps (Grade-Separated)
Single-Lane 		2024 Year Completed estimated (2023-2024). https://www.codot.gov/projects/i70floydhill/earlyprojects.
Pueblo, CO
Pueblo Co.
United States 		Walking Stick Blvd. / 47th St. / Vision Hills Pkwy.
(38.32430, -104.58110) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
54.8640 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2021
Edwards, CO
Eagle Co.
United States 		US 6 / Hillcrest Dr.
(39.65388, -106.62911) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		2024 https://www.eaglecounty.us/news_detail_T24_R433.php.
Montrose, CO
Montrose Co.
United States 		Niagara Rd. / Hillcrest Dr.
(38.46724, -107.85663) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		2024 https://www.montrosepress.com/hillcrest-and-niagara-roundabout-opens/image_bc92464a-3aea-11ef-be15-b79f08cef2a5.html
Montrose, CO
Montrose Co.
United States 		Grand Ave. / N 9th St.
(38.48349, -107.88856) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2012 Year Completed estimated (2011-2012).
Breckenridge, CO
Summit Co.
United States 		N Park Ave. / Watson Ave.
(39.48470, -106.04887) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2022 https://www.townofbreckenridge.com/live/watson-roundabout
Greeley, CO
Weld Co.
United States 		N 35th Ave. / W O St. / CR 64
(40.45520, -104.73479) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
67.0560 		Other (At-Grade)
Single-Lane 		2022 Merging right-turn bypass lanes on all legs. Designed with striped out outer portion of circulatory roadway for future expansion to outside. Year Completed estimated (2021-2023).
Fountain, CO
El Paso Co.
United States 		Santa Fe Ave. / S Charter Oak Ranch Rd.
(38.67148, -104.71481) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
48.7680 		Other (At-Grade)
Single-Lane 		2023 Painted splitter island on west leg. https://www.codot.gov/news/2023/may/mamsip-charter-oak-ranch-road-completed
Timnath, CO
Larimer Co.
United States 		Club Dr. / Innovate Pl.
(40.52134, -104.95463) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
53.3400 		Other (At-Grade)
Multilane (2 Lane, 2x2 max) 		2008 Year Completed estimated (2006-2010).
Timnath, CO
Larimer Co.
United States 		Signal Tree Dr. / Timinath Trail Rd.
(40.52143, -104.97703) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
39.6240 		Other (At-Grade)
Single-Lane 		2015 Year Completed estimated (2014-2015).
Timnath, CO
Larimer Co.
United States 		Signal Tree Dr. / Stone Fly Dr.
(40.51928, -104.97637) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
39.6240 		Other (At-Grade)
Single-Lane 		2019 South leg stubbed. Year Completed estimated (2017-2019).
Windsor, CO
Weld Co.
United States 		CO 257 / Pointe Plaza Dr.
(40.47823, -104.88905) 		Roundabout
Existing 		All-Way Yield
At-grade Rail Crossing Signals/Gates (controlling approach only) 		4 Approaches
0 Driveways
45.7200 		Other (At-Grade)
Single-Lane 		2019 At-grade rail crossing located 370 feet to south. Year Completed estimated (2018-2019).
Windsor, CO
Larimer Co.
United States 		Crystal Downs Dr. / Vernazza Way
(40.45625, -104.97811) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
33.5280 		Other (At-Grade)
Single-Lane 		2017 Year Completed estimated (2016-2017).
Berthoud, CO
Weld Co.
United States 		CO 56 / I-25 SB Ramps
(40.30636, -104.98169) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
0.0000 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, 2x1 max) 		2021 https://www.codot.gov/news/2021/november-2021/co56-i25-reopens-early
Berthoud, CO
Weld Co.
United States 		CO 56 / I-25 NB Ramps
(40.30632, -104.97848) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
0.0000 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, 2x2 max) 		2021 https://www.codot.gov/news/2021/november-2021/co56-i25-reopens-early
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
Frederick, CO
Weld Co.
United States 		Colorado Blvd. / 5th St.
(40.09868, -104.94236) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
54.8640 		Other (At-Grade)
Single-Lane 		2016 Striped out inside circulating lane and inside entry lanes on north and south legs, with evidence of vehicle paths traveling over striped circulatory roadway area. Year Completed estimated (2015-2017).
Frederick, CO
Weld Co.
United States 		Aggregate Blvd. / Wyndham Hill Pkwy.
(40.09242, -104.99890) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
54.8640 		Other (At-Grade)
Single-Lane 		2006 Right-turn-only lanes on north and south legs. Striped out portions of circulatory roadway.
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).
Broomfield, CO
Broomfield Co.
United States 		W 169th Ave. / Palisade Pkwy.
(40.00437, -104.99443) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
42.6720 		Other (At-Grade)
Single-Lane 		2014
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).
Thornton, CO
Adams Co.
United States 		E 162nd Ave. / Grant St. / (parking)
(39.98980, -104.98308) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
48.7680 		Other (At-Grade)
Single-Lane 		2007
Thornton, CO
Adams Co.
United States 		E 163rd Ave. / Elizabeth St.
(39.99121, -104.95523) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
33.5280 		Other (At-Grade)
Single-Lane 		2017 Year Completed estimated (2017-2018).
Brighton, CO
Adams Co.
United States 		Longs Peak St. / N 46th Ave.
(39.99462, -104.75972) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
33.5280 		Other (At-Grade)
Single-Lane 		2021
Brighton, CO
Adams Co.
United States 		Longs Peak St. / Silo Ct.
(39.99463, -104.75777) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
33.5280 		Other (At-Grade)
Single-Lane 		2022 Year Completed estimated (2021-2022).
Brighton, CO
Adams Co.
United States 		Longs Peak St. / Baler Ct.
(39.99464, -104.75476) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
33.5280 		Other (At-Grade)
Single-Lane 		2022 Year Completed estimated (2021-2022).
Brighton, CO
Adams Co.
United States 		Longs Peak St. / Bowie Dr. / N 46th Ave.
(39.99239, -104.75969) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
33.5280 		Other (At-Grade)
Single-Lane 		2021 2022 or earlier (SV)
Brighton, CO
Adams Co.
United States 		156th Ave. / 157th Ave. / Syracuse Way
(39.97989, -104.89921) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
38.1000 		Other (At-Grade)
Single-Lane 		2018 Year Completed estimated (2018-2019).
Thornton, CO
Adams Co.
United States 		Grant St. / E 146th Ave. / (parking)
(39.96090, -104.98184) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
60.9600 		Other (At-Grade)
Multilane (2 Lane, 2x2 max) 		2018 Year Completed estimated (2018-2019).