|
City,
State County Country |
Intersection (Lat, Lng) |
Type Status |
Control Type / Other Control Type | Approaches / Driveways / ICD (m) |
Functional Class / LaneType |
Year Completed | Comments |
|---|---|---|---|---|---|---|---|
|
Ellicott City,
MD Howard Co. United States |
MD 104 (Waterloo Rd.) / MD 100 WB Ramps (39.22470, -76.80600) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 45.7200 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max) |
1999 | |
|
Topeka,
KS Shawnee Co. United States |
Rice Rd. / I-70 WB Ramps / Sycamore Dr. (39.03610, -95.62310) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 44.5293 |
Freeway Ramps (Grade-Separated) 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. ICD estimated from Google Maps linework. |
|
Topeka,
KS Shawnee Co. United States |
Rice Rd. / I-70 EB Ramps / Cyprus Drive (39.03190, -95.62320) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 52.8817 |
Freeway Ramps (Grade-Separated) 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. ICD estimated from Google Maps linework. |
|
Green Bay,
WI Brown Co. 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 45.9811 |
Freeway Ramps (Grade-Separated) Multilane (3+ Lane) |
2012 | Series of 3 roundabouts. Opened August 31, 2012. ICD estimated from Google Maps linework. |
|
Green Bay,
WI Brown Co. 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 43.4266 |
Freeway Ramps (Grade-Separated) Multilane (3+ Lane) |
2012 | Series of 3 roundabouts. Opened August 31, 2012. ICD estimated from Google Maps linework. |
|
Arcata,
CA Humboldt Co. United States |
Guintoli Ln. / US 101 SB Ramps (40.90400, -124.08920) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 39.7180 |
Freeway Ramps (Grade-Separated) Single-Lane |
2005 | ICD estimated from Google Maps linework. |
|
Arcata,
CA Humboldt Co. United States |
Guintoli Ln. / US 101 NB Ramps (40.90492, -124.08510) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 34.3015 |
Freeway Ramps (Grade-Separated) Single-Lane |
2005 | ICD estimated from Google Maps linework. |
|
Kingston,
NY Ulster Co. United States |
I-587 / Rte 28 / I-87 Ramps / Washington Ave. (41.94362, -74.02840) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 60.9600 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max) |
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. |
|
Anchorage,
AK Anchorage United States |
C St. / O'Malley EB Ramps (61.12273, -149.88630) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 53.3400 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x1 max) |
2006 | |
|
Newton,
KS Harvey Co. United States |
Broadway St. / I-135 Ramps (38.05000, -97.32250) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 45.1441 |
Freeway Ramps (Grade-Separated) 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 ICD estimated from Google Maps linework. |
|
Topeka,
KS Shawnee Co. United States |
46th St. / US 75 Ramps (39.12934, -95.71959) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 124.9680 |
Freeway Ramps (Grade-Separated) Single-Lane |
2002 | Roundabout under structure as part of single-point interchange. Elliptical shaped. ICD = 410 ft x 270 ft. Original intersection was at grade. Completed November 2002. |
|
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 35.1352 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2004 | Previously controlled by one-way stop ICD estimated from Google Maps linework. |
|
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 38.0151 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2004 | Spiral striping. ICD estimated from Google Maps linework. |
|
Lewisville,
NC Forsyth Co. 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 29.9191 |
Freeway Ramps (Grade-Separated) Single-Lane |
2000 | Solved capacity problem. Previously controlled by one-way stop ICD estimated from Google Maps linework. |
|
St. George,
UT Washington Co. United States |
E. Brigham Rd. / I-15 NB Ramps (37.05939, -113.58350) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 42.8889 |
Freeway Ramps (Grade-Separated) Single-Lane |
2006 | Raindrop-shaped interchange terminal. ICD estimated from Google Maps linework. |
|
Scaggsville,
MD Howard Co. United States |
MD 216 / US 29 SB Ramps (39.14562, -76.90418) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 53.7228 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2001 | Series of 4 roundabouts. ICD estimated from Google Maps linework. |
|
Scaggsville,
MD Howard Co. 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 53.7234 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2001 | Series of 4 roundabouts. ICD estimated from Google Maps linework. |
|
Millington,
MD Kent Co. United States |
MD 291 / US 301 SB Ramps (39.26463, -75.86641) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 31.4393 |
Freeway Ramps (Grade-Separated) Single-Lane |
1999 | Opened August 1999. ICD estimated from Google Maps linework. |
|
Millington,
MD Kent Co. United States |
MD 291 / US 301 NB Ramps (39.26386, -75.86260) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 28.6656 |
Freeway Ramps (Grade-Separated) Single-Lane |
1999 | Opened August 1999. ICD estimated from Google Maps linework. |
|
Gig Harbor,
WA Pierce Co. United States |
Borgen Blvd. / SR 16 NB Ramps / Burnham Dr. (47.35843, -122.61260) |
Roundabout Existing |
All-Way Yield None |
6 Approaches 0 Driveways 47.7339 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
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 ICD estimated from Google Maps linework. |
|
Richland,
WA Benton Co. 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 49.5635 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2007 | 5th leg is on-ramp to SR 240. Opened November 2007. Lane configuration reduced in 2016. Modified in 2018 to add metering signal. 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/ 21442 |
|
St. George,
UT Washington Co. 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 78.1526 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2006 | Combines interchange ramps and frontage road. ICD estimated from Google Maps linework. |
|
Advance,
NC Davie Co. United States |
NC 801 / I-40 EB Ramps (36.00655, -80.44083) |
Roundabout Removed |
All-Way Yield None |
3 Approaches 0 Driveways 17.3907 |
Freeway Ramps (Grade-Separated) Single-Lane |
2002 | Developer-built "temporary" intersection fix. Previously controlled by one-way stop ICD estimated from Google Maps linework. |
|
Phoenix,
AZ Maricopa Co. United States |
Happy Valley Rd. / I-17 NB Ramps (33.71291, -112.11477) |
Roundabout Removed |
All-Way Yield None |
4 Approaches 0 Driveways 64.0077 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2020 | Initially constructed 2002, revised 2005. Removed in 2020, replaced with diverging diamond interchange: https://www.youtube.com/watch?v=Xgcxmf9UYWw. https://azdot.gov/adot-blog/requiem-roundabouts-least-ones-happy-valley-road 21442 |
|
Phoenix,
AZ Maricopa Co. United States |
Happy Valley Rd. / I-17 SB Ramps (33.71292, -112.12019) |
Roundabout Removed |
All-Way Yield None |
3 Approaches 0 Driveways 62.4840 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2020 | Initially constructed 2002, revised 2005. Removed in 2020, replaced with diverging diamond interchange: https://www.youtube.com/watch?v=Xgcxmf9UYWw. https://azdot.gov/adot-blog/requiem-roundabouts-least-ones-happy-valley-road 21442 |
|
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. |
|
Gig Harbor,
WA Pierce Co. United States |
Borgen Blvd. / SR 16 SB Ramps (47.35868, -122.61610) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 38.8342 |
Freeway Ramps (Grade-Separated) Single-Lane |
2004 | Opened March 2004. ICD estimated from Google Maps linework. |
|
Kaukauna,
WI Outagamie Co. United States |
CTH J / US 41 SB Ramps (44.30645, -88.24948) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 35.8965 |
Freeway Ramps (Grade-Separated) Single-Lane |
2010 | Opened October 11, 2010. ICD estimated from Google Maps linework. |
|
Columbia,
MO Boone Co. 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 94.7178 |
Freeway Ramps (Grade-Separated) 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. ICD estimated from Google Maps linework. |
|
Carson City,
NV Carson City Co. United States |
Arrowhead Dr. / I-580 SB Ramp (39.19810, -119.77540) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 27.7669 |
Freeway Ramps (Grade-Separated) Single-Lane |
2002 | Future SB on-ramp for Carson City Freeway (I-580). Overpass and roundabouts completed in 2002; freeway ramps completed ~2005. ICD estimated from Google Maps linework. |
|
Carson City,
NV Carson City Co. United States |
Arrowhead Dr. / I-580 NB Ramps / Imus Rd. (39.19840, -119.77380) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 28.6923 |
Freeway Ramps (Grade-Separated) Single-Lane |
2002 | NB off-ramp for Carson City Freeway (I-580) and extension of Imus Road. Overpass and roundabouts completed in 2002. ICD estimated from Google Maps linework. |
|
Sterling Heights,
MI Macomb Co. 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 76.2000 |
Freeway Ramps (Grade-Separated) Multilane (3+ Lane) |
2005 | Completed June 2005. |
|
Kaukauna,
WI Outagamie Co. United States |
CTH J / US 41 NB Ramps (44.30463, -88.24939) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 37.6070 |
Freeway Ramps (Grade-Separated) Single-Lane |
2010 | Opened October 11, 2010. ICD estimated from Google Maps linework. |
|
Avon,
CO Eagle Co. United States |
William J Post Blvd. / I-70 WB Ramps (39.62759, -106.49460) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 38.6349 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2003 | ICD estimated from Google Maps linework. |
|
Avon,
CO Eagle Co. United States |
William J Post Blvd. / I-70 EB Ramps (39.62714, -106.49610) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 37.7153 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2003 | ICD estimated from Google Maps linework. |
|
Newton,
KS Harvey Co. United States |
First St. / I-135 Ramps (38.04250, -97.32240) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 65.8419 |
Freeway Ramps (Grade-Separated) Single-Lane |
2003 | Single-point interchange. Previously controlled by one-way stop ICD estimated from Google Maps linework. |
|
Hanover,
MD Anne Arundel Co. United States |
Arundel Mills Blvd. / MD 295 NB Ramps (39.15573, -76.74459) |
Roundabout Removed |
All-Way Yield None |
3 Approaches 0 Driveways 26.8575 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2002 | ICD estimated from Google Maps linework. Replaced with DDI |
|
Hanover,
MD Anne Arundel Co. United States |
Arundel Mills Blvd. / MD 295 SB Ramps (39.15677, -76.74617) |
Roundabout Removed |
All-Way Yield None |
2 Approaches 0 Driveways 66.6796 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2002 | ICD estimated from Google Maps linework. Replaced with DDI. |
|
Jessup,
MD Howard Co. United States |
Canine Rd. / MD 32 EB Ramps (39.10101, -76.76953) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 38.0005 |
Freeway Ramps (Grade-Separated) Single-Lane |
2001 | ICD estimated from Google Maps linework. |
|
Truckee,
CA Nevada Co. United States |
Hwy 89 / I-80 EB Ramps (39.32243, -120.20770) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 55.4354 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2005 | ICD estimated from Google Maps linework. |
|
Camp Verde,
AZ Yavapai Co. United States |
Middle Verde Rd. / I-17 NB Ramps (34.61039, -111.86160) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 34.4040 |
Freeway Ramps (Grade-Separated) Single-Lane |
2006 | ICD estimated from Google Maps linework. |
|
Truckee,
CA Nevada Co. United States |
Hwy 89 / I-80 WB Ramps (39.32386, -120.20760) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 40.6518 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2005 | ICD estimated from Google Maps linework. |
|
Acoma Indian Reservation,
NM McKinley Co. United States |
SH 30 / I-40 WB Ramps (35.07505, -107.56110) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 65.4884 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2010 | Merging right-turn bypass lane on north leg. Series of 3 roundabouts. ICD estimated from Google Maps linework. |
|
Brighton,
MI Livingston Co. United States |
Lee Rd. / US 23 NB Ramps / Fieldcrest Dr. (42.50486, -83.75652) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 47.5461 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2005 | ICD estimated from Google Maps linework. |
|
Brighton,
MI Livingston Co. United States |
Lee Rd. / US 23 SB Ramps (42.50605, -83.75954) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 37.8600 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2006 | Linked with Lee Rd/Whitmore Lake Rd roundabout. Previously controlled by one-way stop control ICD estimated from Google Maps linework. |
|
Buena Vista Township,
MI Saginaw Co. United States |
M-81 / I-75 SB Ramps (43.45060, -83.89209) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 34.6818 |
Freeway Ramps (Grade-Separated) Single-Lane |
2006 | Right turn bypass lanes ICD estimated from Google Maps linework. |
|
Buena Vista Township,
MI Saginaw Co. United States |
M-81 / I-75 NB Ramps (43.45056, -83.88958) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 34.6818 |
Freeway Ramps (Grade-Separated) Single-Lane |
2006 | Right turn bypass lanes ICD estimated from Google Maps linework. |
|
Chattanooga,
TN Hamilton Co. United States |
SR 153 NB Ramps / Lake Resort Dr. (35.10986, -85.22842) |
Roundabout Existing |
All-Way Yield Unknown |
3 Approaches 0 Driveways 55.6902 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
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 ICD estimated from Google Maps linework. |
|
Chattanooga,
TN Hamilton Co. United States |
SR 153 SB Ramps / N. Access Rd. / TVA offices (35.10868, -85.23122) |
Roundabout Existing |
All-Way Yield Unknown |
4 Approaches 0 Driveways 97.7036 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2006 | N Access Road is a 4 lane arterial road. Fatal crash April 4, 2010. 11861-05. ICD estimated from Google Maps linework. |
|
Jessup,
MD Anne Arundel Co. United States |
MD 198 (Laurel Fort Meade Rd.) / MD 32 EB Ramps (39.08997, -76.75736) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 53.3400 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2002 | Lanes reduced in 2010. 21442 |
|
Jessup,
MD Anne Arundel Co. United States |
MD 198 (Laurel Fort Meade Rd.) / MD 32 WB Ramps (39.09178, -76.75688) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 53.3400 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2002 | Lanes reduced in 2010. 21442 |
|
Acoma Indian Reservation,
NM McKinley Co. United States |
SH 30 / I-40 EB Ramps (35.07341, -107.56120) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 65.4897 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2010 | Merging right-turn bypass lane on west leg. Series of 3 roundabouts. 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. |
|
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. |
|
Mesa,
AZ Maricopa Co. United States |
Brown Rd. / Loop 202 SB Ramps (33.43689, -111.65280) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 42.8563 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2007 | ICD estimated from Google Maps linework. |
|
Mesa,
AZ Maricopa Co. United States |
Brown Rd. / Loop 202 NB Ramps (33.43694, -111.64850) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 47.8396 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2007 | ICD estimated from Google Maps linework. |
|
Woburn,
MA Middlesex Co. United States |
I-95 Ramps / MA 38 (Main St.) (42.49945, -71.15711) |
Rotary Existing |
Unknown Unknown |
4 Approaches 0 Driveways 30.8196 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
ICD estimated from Google Maps linework. | |
|
Revere,
MA Suffolk Co. United States |
Copeland Circle [Rte 60 (Squire Rd.) / US 1 Ramps] (42.43008, -71.01710) |
Rotary Existing |
Unknown Unknown |
4 Approaches 0 Driveways 381.0000 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max) |
Retrofitted (November 2018) with multi-lane approaches/departures on the Route 1 ramps and roundabout style pavement markings and signs within the circulating roadway. ICD = 1250 ft x 880 ft. 21442 | |
|
Boston,
MA Suffolk Co. United States |
Willard St. / I-93 Ramps / Furnace Brook Expwy. (42.24208, -71.02673) |
Rotary Existing |
Unknown Unknown |
4 Approaches 0 Driveways 99.0276 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
ICD estimated from Google Maps linework. | |
|
Brighton,
CO Adams Co. United States |
W. Bridge St. / US 85 NB Ramps (39.98683, -104.82320) |
Roundabout Existing |
Unknown Unknown |
3 Approaches 0 Driveways 43.0090 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2006 | Part of double-dumbbell interchange with two roundabouts and one storage lane into railroad crossing. ICD estimated from Google Maps linework. |
|
Brighton,
CO Adams Co. United States |
W. Bridge St. / US 85 SB Ramps (39.98682, -104.82450) |
Roundabout Existing |
Unknown Unknown |
5 Approaches 0 Driveways 43.9241 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2006 | Part of double-dumbbell interchange with two roundabouts and one storage lane into railroad crossing. ICD estimated from Google Maps linework. |
|
Lewisville,
NC Forsyth Co. United States |
Concord Church Rd. / US 421 NB Ramps (36.09143, -80.42963) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 30.8835 |
Freeway Ramps (Grade-Separated) Single-Lane |
2003 | Mirror image of other ramp. ICD estimated from Google Maps linework. |
|
Owatonna,
MN Steele Co. United States |
CSAH 7 / TH 14 EB Ramps (44.05747, -93.27671) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 46.3480 |
Freeway Ramps (Grade-Separated) Single-Lane |
2012 | ICD estimated from Google Maps linework. |
|
Owatonna,
MN Steele Co. United States |
CSAH 7 / TH 14 WB Ramps (44.05998, -93.27671) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 41.1964 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2012 | ICD estimated from Google Maps linework. |
|
North Pole,
AK Fairbanks North Star United States |
Badger Rd. / Richardson Hwy WB Ramps (64.75903, -147.35120) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 29.5390 |
Freeway Ramps (Grade-Separated) Single-Lane |
2007 | Series of three roundabouts. Raindrop-shaped central island. ICD estimated from Google Maps linework. |
|
North Pole,
AK Fairbanks North Star United States |
Badger Rd. / Richardson Hwy EB Ramps / Santa Claus Ln. (64.75820, -147.35170) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 31.5771 |
Freeway Ramps (Grade-Separated) Single-Lane |
2007 | Series of three roundabouts. Previously controlled by one-way stop ICD estimated from Google Maps linework. |
|
Stevensville,
MD Queen Annes Co. United States |
Thompson Creek Rd. / US 50 EB Ramps (38.97599, -76.31046) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 16.7127 |
Freeway Ramps (Grade-Separated) Single-lane w/ Traversable Central Island |
2007 | Mini-roundabout. ICD estimated from Google Maps linework. |
|
Burtonsville,
MD Montgomery Co. United States |
Dustin Rd. / US 29 SB Offramp / Columbia Pike (39.12256, -76.92656) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 43.5482 |
Freeway Ramps (Grade-Separated) Single-Lane |
2006 | Fatal crash October 14, 2007.: http://www.fredericknewspost.com/sections/news/display.htm?StoryID=66411. 11861-05. ICD estimated from Google Maps linework. |
|
Ann Arbor,
MI Washtenaw Co. United States |
Maple Rd. / M-14 WB Ramps (42.30178, -83.78112) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 159.9999 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2007 | |
|
Ann Arbor,
MI Washtenaw Co. United States |
Maple Rd. / M-14 EB Ramps (42.29992, -83.78104) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 48.7680 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2007 | |
|
Abbotsford,
BC Fraser Valley Regional District Canada |
Mt Lehman Rd. / Old Yale Rd. / Hwy 1 WB Entrance Ramp (49.05889, -122.38131) |
Roundabout Removed |
All-Way Yield None |
3 Approaches 0 Driveways 44.0000 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max) |
2022 | Roundabout (multilane, 2x2) constructed 2006 to replace a two-way stop intersection. Roundabout replaced with traffic signal in 2022. |
|
Surrey,
BC Greater Vancouver Regional District Canada |
8 Ave. / Hwy 99 NB Ramps (49.01694, -122.75800) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 34.4645 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2005 | ICD estimated from Google Maps linework. |
|
Fort McMurray,
AB Wood Buffalo Canada |
Hwy 63 NB Ramps / King St. (56.70683, -111.35380) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 30.1574 |
Freeway Ramps (Grade-Separated) Single-Lane |
2003 | http://www.engineering.ualberta.ca/uofaengineer/article.cfm?article=40221&issue=39463 ICD estimated from Google Maps linework. |
|
Sheboygan,
WI Sheboygan Co. United States |
STH 42 / I-43 NB Ramps (43.79261, -87.76325) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 37.0714 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2007 | Opened November 2007. http://www.sheboygan-press.com/apps/pbcs.dll/article?AID=/20071028/SHE0101/710280468/1973 ICD estimated from Google Maps linework. |
|
Sheboygan,
WI Sheboygan Co. United States |
STH 42 / I-43 SB Ramps (43.79406, -87.76523) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 43.9673 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2007 | Opened November 2007. http://www.sheboygan-press.com/apps/pbcs.dll/article?AID=/20071028/SHE0101/710280468/1973 ICD estimated from Google Maps linework. |
|
Federal Way,
WA King Co. United States |
S 317th St. / 28th Ave. S / I-5 HOV Access Ramps (47.31781, -122.29760) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 40.4836 |
Freeway Ramps (Grade-Separated) Single-Lane |
2006 | Opened February 2006. ICD estimated from Google Maps linework. |
|
Charlotte,
NC Mecklenburg Co. United States |
Moores Chapel Rd. / I-485 NB Ramp (35.27366, -80.96478) |
Roundabout Existing |
Unknown Unknown |
3 Approaches 0 Driveways 37.0520 |
Freeway Ramps (Grade-Separated) Single-Lane |
2005 | Interchange terminal. Fatal crash May 14, 2008. ICD estimated from Google Maps linework. |
|
Charlotte,
NC Mecklenburg Co. United States |
Moores Chapel Rd. / I-485 SB Ramp (35.27376, -80.96779) |
Roundabout Existing |
Unknown Unknown |
3 Approaches 0 Driveways 37.0520 |
Freeway Ramps (Grade-Separated) Single-Lane |
2005 | Interchange terminal. Fatal crash June 28, 2011. ICD estimated from Google Maps linework. |
|
Waynesville,
NC Haywood Co. United States |
Hyatt Creek Rd. / US 23-US 74 SB Ramps (35.46494, -83.01322) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 30.1551 |
Freeway Ramps (Grade-Separated) Single-Lane |
2008 | ICD estimated from Google Maps linework. |
|
Columbus,
NC Polk Co. United States |
NC 108 / I-26 EB Ramps (35.24493, -82.20628) |
Roundabout Existing |
Unknown Unknown |
4 Approaches 0 Driveways 35.1144 |
Freeway Ramps (Grade-Separated) Single-Lane |
2004 | Part of interchange - two-lane bridge. ICD estimated from Google Maps linework. |
|
Columbus,
NC Polk Co. United States |
NC 108 / I-26 WB Ramps (35.24627, -82.20499) |
Roundabout Existing |
Unknown Unknown |
4 Approaches 0 Driveways 34.1384 |
Freeway Ramps (Grade-Separated) Single-Lane |
2007 | Part of interchange - two-lane bridge. ICD estimated from Google Maps linework. |
|
North Bend,
WA King Co. United States |
SR 202 / I-90 EB Ramps (47.48782, -121.79730) |
Roundabout Existing |
All-Way Yield Unknown |
3 Approaches 0 Driveways 41.9673 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2007 | Opened November 2007. ICD estimated from Google Maps linework. |
|
Annapolis Junction,
MD Anne Arundel Co. United States |
Guilford Rd. / MD 32 WB Ramps (39.12294, -76.78472) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 32.4293 |
Freeway Ramps (Grade-Separated) Single-Lane |
2002 | Bypass lanes on all legs. ICD estimated from Google Maps linework. |
|
Hughesville,
MD Charles Co. United States |
MD 231 / MD 5 NB Ramps (38.53426, -76.77790) |
Roundabout Existing |
Unknown Unknown |
3 Approaches 0 Driveways 54.1863 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2005 | ICD estimated from Google Maps linework. |
|
Hughesville,
MD Charles Co. United States |
MD 231 / MD 5 SB Ramps (38.53381, -76.77969) |
Roundabout Existing |
Unknown Unknown |
3 Approaches 0 Driveways 58.8579 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2005 | ICD estimated from Google Maps linework. |
|
Avonport,
NS Kings Canada |
Trunk 1 / Hwy 101 WB Ramps / Oak Island Rd. (45.10019, -64.25748) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 60.9600 |
Freeway Ramps (Grade-Separated) Single-Lane |
2006 | |
|
Rio Puerco,
NM Bernalillo Co. United States |
Central Ave. / I-40 EB Ramps (35.03048, -106.94750) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 68.4580 |
Freeway Ramps (Grade-Separated) Single-Lane |
2008 | Owned by New Mexico DOT. Previously controlled by stop control ICD estimated from Google Maps linework. |
|
Cabazon,
CA Riverside Co. United States |
Apache Trl. / I-10 EB Ramps (33.92071, -116.80680) |
Roundabout Existing |
All-Way Yield At-grade Rail Crossing Signals/Gates (controlling approach only) |
3 Approaches 0 Driveways 54.5087 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2008 | Opened July 11, 2008. http://www.pe.com/localnews/rivcounty/stories/PE_News_Local_S_circle21.46d763e.html. Railroad in close proximity. ICD estimated from Google Maps linework. |
|
Cabazon,
CA Riverside Co. United States |
Apache Trl. / Thunder Rd. / Seminole Dr. / I-10 WB Ramps (33.92192, -116.80610) |
Roundabout Existing |
All-Way Yield None |
5 Approaches 0 Driveways 79.2480 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x2 max) |
2008 | Opened July 11, 2008. http://www.pe.com/localnews/rivcounty/stories/PE_News_Local_S_circle21.46d763e.html. |
|
Kennewick,
WA Benton Co. United States |
SR 240 / US 395 SB Ramps (46.21697, -119.13980) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 47.9307 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2009 | June 2009. ICD estimated from Google Maps linework. |
|
Kennewick,
WA Benton Co. United States |
SR 240 / US 395 NB Ramps / Columbia Dr. (46.21688, -119.13680) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 28.0973 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2009 | June 2009. ICD estimated from Google Maps linework. |
|
New Berlin,
WI Waukesha Co. United States |
Moorland Rd. (CTH O) / I-43 NB Ramps / Rockridge Rd. (42.94913, -88.10900) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 47.2068 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2007 | Opened September 2007. ICD estimated from Google Maps linework. |
|
New Berlin,
WI Waukesha Co. United States |
CTH Y (Racine Ave.) / I-43 NB Ramps (42.93221, -88.15884) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 41.9731 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2009 | Opened November 2009. ICD estimated from Google Maps linework. |
|
New Berlin,
WI Waukesha Co. United States |
CTH Y (Racine Ave.) / I-43 SB Ramps (42.93426, -88.15884) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 47.2182 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2009 | Opened November 2009. ICD estimated from Google Maps linework. |
|
New Berlin,
WI Waukesha Co. United States |
Moorland Rd. (CTH O) / I-43 SB Ramps (42.95341, -88.10897) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 67.3087 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2008 | Opened November 2008. ICD estimated from Google Maps linework. |
|
Emporia,
KS Lyon Co. United States |
(connector to US 50) / I-35 Ramps (38.41494, -96.22918) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 97.5360 |
Freeway Ramps (Grade-Separated) Single-Lane |
2008 | New interchange configuration. Elliptical shaped. ICD = 320 ft x 270 ft. Constructed initially as half double-lane, half triple-lane. Opened November 2008. |
|
Lawrence,
KS Douglas Co. United States |
McDonald Dr. / I-70 WB Ramps (38.99075, -95.25724) |
Roundabout Existing |
All-Way Yield None |
2 Approaches 0 Driveways 66.8368 |
Freeway Ramps (Grade-Separated) Single-Lane |
2008 | Opened November 2008. Replaced trumpet interchange. ICD estimated from Google Maps linework. |
|
Lawrence,
KS Douglas Co. United States |
E 1450 Rd. / I-70 Ramps (38.99456, -95.22959) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 73.1520 |
Freeway Ramps (Grade-Separated) Single-Lane |
2011 | Replaced trumpet interchange. |
|
Grass Valley,
CA Nevada Co. United States |
E. Main St. / Idaho-Maryland Rd. / SR 20 WB Ramps (39.22168, -121.05380) |
Roundabout Existing |
All-Way Yield None |
4 Approaches 0 Driveways 39.6240 |
Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) |
2008 | Yield-controlled right-turn bypass lane on north leg with very shallow angle. Left-turn-only lane on east leg. |
|
Bellingham,
WA Whatcom Co. United States |
Northwest Ave. / I-5 NB Ramp (48.78500, -122.50420) |
Roundabout Existing |
All-Way Yield None |
3 Approaches 0 Driveways 35.4117 |
Freeway Ramps (Grade-Separated) Single-Lane |
2010 | RT bypass lane on southbound approach. ICD estimated from Google Maps linework. |