|
City,
State County Country |
Intersection (Lat, Lng) |
Type Status |
Control Type / Other Control Type | Approaches / Driveways |
Functional Class / LaneType |
Year Completed | Comments |
|---|---|---|---|---|---|---|---|
|
Avon,
CO Eagle 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 |
Freeway Ramps Multilane (2 Lane) |
1997 | Highway ref. pt. 70-166.62. Raindrop-shaped central island. |
|
Avon,
CO Eagle United States |
Avon Rd./I-70 EB Ramps (39.63683, -106.52170) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
1997 | Highway ref. pt. 70-166.62. Previously controlled by two-way stop |
|
Ritchie,
MD Prince Georges United States |
Ritchie-Marlboro Rd./I-95 SB Ramps (38.86894, -76.84738) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2001 | |
|
Ritchie,
MD Prince Georges United States |
Ritchie-Marlboro Rd./I-95 NB Ramps (38.86824, -76.84158) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2001 | |
|
Ellicott City,
MD Howard United States |
MD 103/MD 100 WB Ramps (39.20846, -76.78294) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
1998 | Opened November 1998. |
|
Ellicott City,
MD Howard United States |
MD 103/MD 100 EB Ramps (39.20733, -76.78243) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
1998 | Opened November 1998. |
|
Ellicott City,
MD Howard United States |
Snowden River Pkwy./MD 100 WB Ramps (39.21233, -76.79544) |
Roundabout Existing |
All-Way Yield Metering Signal |
3 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
1998 | Opened November 1998. Metering signal on Snowden River Pkwy approach. |
|
Ellicott City,
MD Howard United States |
MD 104 (Waterloo Rd.)/MD 100 WB Ramps (39.22470, -76.80600) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
1999 | |
|
Arcata,
CA Humboldt United States |
Guintoli Ln./US 101 NB Ramps (40.90492, -124.08510) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2005 | |
|
Kingston,
NY Ulster United States |
I-587/Rte. 28/I-87/Washington Ave. (41.94362, -74.02840) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2000 | A 600 ft diameter traffic circle was replaced by 200 ft diameter roundabout. At Exit 19 from I-87. I-587 terminates in roundabout. |
|
Green Bay,
WI Brown United States |
W. Mason St. (STH 32-STH 54)/US 41 NB Ramps (44.52415, -88.08103) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (3+ Lane) |
2012 | Series of 3 roundabouts. Opened August 31, 2012. |
|
Topeka,
KS Shawnee United States |
46th St./US 75 Ramps (39.12934, -95.71959) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2002 | Roundabout under structure as part of single-point interchange. Elliptical roundabout. Original intersection was at grade. Completed November 2002. |
|
Lewisville,
NC Forsyth United States |
Concord Church Rd./US 421 SB Ramp/Williams Rd. (36.08978, -80.43072) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2000 | Solved capacity problem. Previously controlled by one-way stop |
|
Anchorage,
AK Anchorage United States |
Dowling Rd./New Seward Hwy SB Ramps (61.16636, -149.85780) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2004 | Previously controlled by one-way stop |
|
Anchorage,
AK Anchorage United States |
Dowling Rd./New Seward Hwy NB Ramps (61.16637, -149.85520) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2004 | Spiral striping. |
|
De Pere,
WI Brown United States |
Scheuring Rd. (CTH F)/US 41 NB Ramps (44.43074, -88.10989) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2011 | Series of 6 roundabouts. Opened September 2011. Circular central island. |
|
Topeka,
KS Shawnee United States |
Rice Rd./I-70 WB Ramps/Sycamore Dr. (39.03610, -95.62310) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2000 | Part of a major realignment of I-70 and K-4. Sycamore Drive is one way with two westbound lanes (into the roundabout). Partial cloverleaf AB interchange type. Completed October 2000. |
|
Topeka,
KS Shawnee United States |
Rice Rd./I-70 EB Ramps/Cyprus Drive (39.03190, -95.62320) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2000 | Part of a major realignment of I-70 and K-4. Cyprus Drive is One Way Eastbound (away from the roundabout). Partial cloverleaf AB interchange type. Completed October 2000. |
|
Green Bay,
WI Brown United States |
W. Mason St. (STH 32-STH 54)/US 41 SB Ramps (44.52418, -88.08284) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (3+ Lane) |
2012 | Series of 3 roundabouts. Opened August 31, 2012. |
|
St. George,
UT Washington United States |
E. Brigham Rd./I-15 NB Ramps (37.05939, -113.58350) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2006 | Raindrop-shaped interchange terminal. |
|
Richland,
WA Benton United States |
Steptoe Dr./SR 240 EB Ramps/Columbia Park Trl. (46.23893, -119.24546) |
Roundabout Existing |
All-Way Yield Metering Signal |
5 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2007 | 5th leg is on-ramp to SR 240. Opened November 2007. According to local news (link below) they started metering the traffic on the westbound Columbia Park Trail approach in 2018. It only turns on when traffic coming off the freeway gets backed up. https://97rockonline.com/tri-cities-roundabout-gets-new-metered-traffic-light-wait-what/ |
|
Scaggsville,
MD Howard United States |
MD 216/US 29 SB Ramps (39.14562, -76.90418) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2001 | Series of 4 roundabouts. |
|
Scaggsville,
MD Howard United States |
MD 216/US 29 NB Ramps/Ice Crystal Dr. (39.14476, -76.89799) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2001 | Series of 4 roundabouts. |
|
Millington,
MD Kent United States |
MD 291/US 301 SB Ramps (39.26463, -75.86641) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
1999 | Opened August 1999. |
|
Millington,
MD Kent United States |
MD 291/US 301 NB Ramps (39.26386, -75.86260) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
1999 | Opened August 1999. |
|
Phoenix,
AZ Maricopa United States |
Happy Valley Rd./I-17 SB Ramps (33.71301, -112.12000) |
Roundabout Existing |
All-Way Yield None |
5 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2002 | Revised 2005. |
|
Frisco,
CO Summit United States |
SH 9/I-70 WB Ramps (39.59339, -106.09700) |
Roundabout Existing |
All-Way Yield None |
5 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2000 | Highway ref. pt. 70-202.35. |
|
Gig Harbor,
WA Pierce United States |
Borgen Blvd./SR 16 SB Ramps (47.35868, -122.61610) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2004 | Opened March 2004. |
|
De Pere,
WI Brown United States |
Scheuring Rd. (CTH F)/US 41 SB Ramps (44.43050, -88.11402) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2011 | Series of 6 roundabouts. Opened September 2011. |
|
Arcata,
CA Humboldt United States |
Guintoli Ln./US 101 SB Ramps (40.90400, -124.08920) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2005 | |
|
Newton,
KS Harvey United States |
Broadway St./I-135 Ramps (38.05000, -97.32250) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2003 | Single-point interchange. Near roundabout interchange at I-135/1st Street. Roundabout completed January 2002, ramps from I-135 to the roundabout reopened March 2002. Eliptical structure incorporating both NB and SB ramps. Previously controlled by one-way stop |
|
Gig Harbor,
WA Pierce United States |
Borgen Blvd./SR 16 NB Ramps/Burnham Dr. (47.35843, -122.61260) |
Roundabout Existing |
All-Way Yield None |
6 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2001 | Oval shaped central island. 6 legged configuration includes a on-ramp (outbound)leg. Central island is used as a roadway storm detention pond. Completed Summer/Fall 2001. Previously controlled by one-way stop |
|
Kaukauna,
WI Outagamie United States |
CTH J/US 41 SB Ramps (44.30645, -88.24948) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2010 | Opened October 11, 2010. |
|
Columbia,
MO Boone United States |
Business Loop 70/I-70 WB Ramps/Creasy Springs Rd. (38.96655, -92.35241) |
Roundabout Removed |
All-Way Yield Unknown |
5 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
1996 | First roundabout in Missouri by Missouri DOT. Originally built in 1996 per article: https://www.voxmagazine.com/news/all-about-roundabouts-in-columbia/article_93724b2b-8b20-5228-b4de-315c5c3d2004.html. Replaced with roundabout to immediate west. |
|
Carson City,
NV Carson City United States |
Arrowhead Dr./I-580 SB Ramp (39.19810, -119.77540) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2002 | Future SB on-ramp for Carson City Freeway (I-580). Overpass and roundabouts completed in 2002; freeway ramps completed ~2005. |
|
Carson City,
NV Carson City United States |
Arrowhead Dr./I-580 NB Ramps/Imus Rd. (39.19840, -119.77380) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2002 | NB off-ramp for Carson City Freeway (I-580) and extension of Imus Road. Overpass and roundabouts completed in 2002. |
|
Sterling Heights,
MI Macomb United States |
Van Dyke Ave. (M-53)/18 1/2 Mile Rd. (42.60148, -83.03119) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2005 | Completed June 2005. |
|
Avon,
CO Eagle United States |
William J Post Blvd./I-70 WB Ramps (39.62759, -106.49460) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2003 | |
|
Avon,
CO Eagle United States |
William J Post Blvd./I-70 EB Ramps (39.62714, -106.49610) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2003 | |
|
Hanover,
MD Anne Arundel United States |
Arundel Mills Blvd./MD 295 NB Ramps (39.15573, -76.74459) |
Roundabout Removed |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2002 | |
|
Hanover,
MD Anne Arundel United States |
Arundel Mills Blvd./MD 295 SB Ramps (39.15677, -76.74617) |
Roundabout Removed |
All-Way Yield None |
2 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2002 | |
|
Jessup,
MD Howard United States |
Canine Rd./MD 32 EB Ramps (39.10101, -76.76953) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2001 | |
|
Truckee,
CA Nevada United States |
Hwy 89/I-80 EB Ramps (39.32243, -120.20770) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2005 | |
|
Kaukauna,
WI Outagamie United States |
CTH J/US 41 NB Ramps (44.30463, -88.24939) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2010 | Opened October 11, 2010. |
|
Advance,
NC Davie United States |
NC 801/I-40 EB Ramps (36.00655, -80.44083) |
Roundabout Removed |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2002 | Developer-built "temporary" intersection fix. Previously controlled by one-way stop |
|
St. George,
UT Washington United States |
E. Brigham Rd./I-15 SB Ramps/Pioneer Rd. (37.05999, -113.58560) |
Roundabout Existing |
All-Way Yield None |
6 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2006 | Combines interchange ramps and frontage road. |
|
Newton,
KS Harvey United States |
First St./I-135 Ramps (38.04250, -97.32240) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways |
Freeway Ramps Single-Lane |
2003 | Single-point interchange. Previously controlled by one-way stop |
|
Truckee,
CA Nevada United States |
Hwy 89/I-80 WB Ramps (39.32386, -120.20760) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2005 | |
|
Acoma Indian Reservation,
NM McKinley United States |
SH 30/I-40 WB Ramps (35.07505, -107.56110) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways |
Freeway Ramps Unknown |
2010 | Series of 3 roundabouts |
|
Chattanooga,
TN Hamilton United States |
SR 153 NB Ramps/Lake Resort Dr. (35.10986, -85.22842) |
Roundabout Existing |
All-Way Yield Unknown |
3 Approaches 0 Driveways |
Freeway Ramps Multilane (2 Lane) |
2006 | At new intersection with new bridge and alignment of Lake Resort Drive. Former intersection was ~800 to the south. Non-symetric design. Some motions have two lanes. Previously controlled by signal |