Roundabouts Database

29616 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
Portland, OR
Multnomah Co.
United States 		NE Holman St. / NE 34th Ave.
(45.56826, -122.62965) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
159.6952 		Other (At-Grade)
Single-Lane 		1988 Completed 10/28/1988. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE 34th Ave. / SE Gladstone St.
(45.49335, -122.62978) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
61.9539 		Other (At-Grade)
Single-Lane 		1996 Completed 10/17/1996. ICD estimated from Google Maps linework.
Port Orchard, WA
Kitsap Co.
United States 		Mitchell Ave. SE / SE Lincoln Ave.
(47.52374, -122.63041) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		2024 https://www.kitsapdailynews.com/news/1st-of-2-y-intersection-roundabouts-opens-in-po/
Anacortes, WA
Skagit Co.
United States 		32nd St. / D Ave.
(48.49654, -122.63159) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
27.4320 		Other (At-Grade)
Single-Lane 		2018
Yelm, WA
Thurston Co.
United States 		SR 510 / Mud Run Rd. SE
(46.96465, -122.63230) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
35.8630 		Other (At-Grade)
Single-Lane 		2010 October 2010. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE 32nd Ave. / SE Lincoln St.
(45.50825, -122.63270) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
12.5549 		Other (At-Grade)
Single-Lane 		1990 Completed 4/25/1990. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE 31st Ave. / SE Clinton St.
(45.50354, -122.63360) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
14.2301 		Other (At-Grade)
Single-Lane 		1990 Completed 6/22/1990. ICD estimated from Google Maps linework.
Bellingham, WA
Whatcom Co.
United States 		Haxton Way / Kwina Rd.
(48.79386, -122.63408) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
51.8160 		Other (At-Grade)
Single-Lane 		2013 Oblong shape. ICD = 170 ft x 135 ft. Open August 2013. Lummi Indian Reservation.
Portland, OR
Multnomah Co.
United States 		SE 30th Ave. / SE Gladstone St.
(45.49337, -122.63466) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
32.6514 		Other (At-Grade)
Single-Lane 		1996 Completed 10/17/1996. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE 30th Ave. / SE Caruthers St.
(45.50550, -122.63470) 		Traffic Calming Circle
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
78.6812 		Other (At-Grade)
Single-Lane 		1990 Completed 4/23/1990. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE 30th Ave. / SE Grant St. (W)
(45.50679, -122.63472) 		Traffic Calming Circle
Existing 		Unknown
None 		3 Approaches
0 Driveways
14.2293 		Other (At-Grade)
Single-Lane 		1990 Completed 4/16/1990. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE 30th Ave. / SE Grant St. (E)
(45.50726, -122.63473) 		Traffic Calming Circle
Existing 		Unknown
None 		3 Approaches
0 Driveways
109.6480 		Other (At-Grade)
Single-Lane 		1990 Completed 4/16/1990. ICD estimated from Google Maps linework.
Langley Township, BC
Greater Vancouver
Canada 		77A Ave. / 211 St.
(49.14294, -122.63810) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
 Other (At-Grade)
Single-Lane 		2016 https://www.langleyadvancetimes.com/news/langley-citys-first-roundabout-opens/
Portland, OR
Multnomah Co.
United States 		SE 27th Ave. / SE Salmon St.
(45.51429, -122.63812) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
29.2916 		Other (At-Grade)
Single-Lane 		1982 Completed 2/16/1982. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		NE 24th Ave. / Brazee St.
(45.54050, -122.64110) 		Traffic Calming Circle
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
 Other (At-Grade)
Single-Lane 		1989 Completed 10/10/1989.
Portland, OR
Multnomah Co.
United States 		NE 24th Ave. / Thompson St.
(45.53896, -122.64110) 		Traffic Calming Circle
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
56.8845 		Other (At-Grade)
Single-Lane 		1989 Completed 10/10/1989. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		NE 24th Ave. / Tillamook St.
(45.53741, -122.64110) 		Traffic Calming Circle
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
56.0495 		Other (At-Grade)
Single-Lane 		1989 Completed 10/10/1989. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE 23rd Ave. / SE Clinton St.
(45.50339, -122.64260) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
31.8085 		Other (At-Grade)
Single-Lane 		1990 Completed 6/22/1990. ICD estimated from Google Maps linework.
Langley Township, BC
Greater Vancouver
Canada 		77A Ave. / 209 St.
(49.14310, -122.64273) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
22.6576 		Other (At-Grade)
Single-Lane 		2016 ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		NE 21st Ave. / Thompson St.
(45.53898, -122.64420) 		Traffic Calming Circle
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
34.2980 		Other (At-Grade)
Single-Lane 		1989 Completed 10/10/1989. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		NE 21st Ave. / Brazee St.
(45.54051, -122.64420) 		Traffic Calming Circle
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
86.9974 		Other (At-Grade)
Single-Lane 		1989 Completed 10/10/1989. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE Ladd Ave. / SE Lavender St.
(45.50686, -122.64744) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
24.2734 		Other (At-Grade)
Single-Lane 		1983 Completed 11/8/1983. ICD estimated from Google Maps linework.
Langley, BC
Greater Vancouver
Canada 		82 Ave. / 207A St.
(49.15167, -122.64809) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
 Other (At-Grade)
Single-Lane 		2022 https://www.crestonvalleyadvance.ca/trending-now/b-c-drivers-struggle-with-roundabout-in-viral-tiktok/ Video shows some drivers going the wrong way during construction: https://www.facebook.com/CityNewsVAN/videos/traffic-chaos-langley-roundabout-fails-go-viral-on-tiktok/1374442239737644/
Langley Township, BC
Greater Vancouver
Canada 		84 Ave. / 207A St.
(49.15549, -122.64810) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
28.1196 		Other (At-Grade)
Single-Lane 		2014 ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE Ladd Circle
(45.50850, -122.64940) 		Other
Existing 		Unknown
None 		0 Approaches
0 Driveways
92.0689 		Other (At-Grade)
Single-Lane 		ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE 16th Ave. / SE Ash St.
(45.52148, -122.64956) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
22.5935 		Other (At-Grade)
Single-Lane 		1988 Completed 10/7/1988. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE 16th Ave. / SE Salmon St.
(45.51435, -122.64961) 		Traffic Calming Circle
Existing 		One-Way/Two-Way Stop
Unknown 		4 Approaches
0 Driveways
15.0642 		Other (At-Grade)
Single-Lane 		1982 Completed 2/18/1982. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE 15th Ave. / SE Oak St.
(45.52006, -122.65057) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
23.4309 		Other (At-Grade)
Single-Lane 		1988 Completed 9/6/1988. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE 15th Ave. / SE Alder St.
(45.51792, -122.65058) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
15.9001 		Other (At-Grade)
Single-Lane 		1988 Completed 9/7/1988. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE Ladd Ave. / SE Palm St.
(45.51025, -122.65144) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
40.1743 		Other (At-Grade)
Single-Lane 		1993 Completed 11/8/1993. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE 14th Ave. / SE Pine St.
(45.52077, -122.65158) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
15.0625 		Other (At-Grade)
Single-Lane 		1988 Completed 9/12/1988. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE 14th Ave. / SE Main St.
(45.51365, -122.65165) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
15.9013 		Other (At-Grade)
Single-Lane 		1988 Completed 9/12/1988. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE 14th Ave. / SE Taylor St.
(45.51507, -122.65166) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
17.5747 		Other (At-Grade)
Single-Lane 		1988 Completed 9/12/1988. ICD estimated from Google Maps linework.
West Linn, OR
Clackamas Co.
United States 		Willamette Falls Dr. / 10th St.
(45.34515, -122.65176) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
25.9080 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2023 Separated bicycle and pedestrian facilities without detectable separation between them. https://www.westlinntidings.com/news/detours-coming-to-west-linn-s-8th-and-5th-avenues-10th-and-11th-streets-for/article_adf0947c-5050-11ef-bec6-f7f801dd37f8.html
Port Orchard, WA
Kitsap Co.
United States 		Tremont St. W / Pottery Ave.
(47.52537, -122.65229) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
54.8640 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2019 https://www.youtube.com/watch?v=PctOoSym9oE
Portland, OR
Multnomah Co.
United States 		SE 13th Ave. / SE Salmon St.
(45.51434, -122.65264) 		Traffic Calming Circle
Existing 		One-Way/Two-Way Stop
Unknown 		4 Approaches
0 Driveways
17.5750 		Other (At-Grade)
Single-Lane 		1989 Completed 1/11/1989. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SE 13th Ave. / SE Madison St.
(45.51294, -122.65266) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
12.5539 		Other (At-Grade)
Single-Lane 		1988 Completed 9/8/1988. ICD estimated from Google Maps linework.
Oak Harbor, WA
Island Co.
United States 		SR 20 / Banta Rd. / Northgate Dr.
(48.36934, -122.65300) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
30.1501 		Other (At-Grade)
Single-Lane 		2019 https://www.flickr.com/photos/wsdot/48127337916 ICD estimated from Google Maps linework.
Petaluma, CA
Sonoma Co.
United States 		Corona Rd. / Sonoma Mountain Pkwy.
(38.26890, -122.65450) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
1 Driveways
31.8812 		Other (At-Grade)
Single-Lane 		2002 ICD estimated from Google Maps linework.
Dupont, WA
Thurston Co.
United States 		McNeil St. / Marshall Cir.
(47.09618, -122.65520) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
26.8311 		Other (At-Grade)
Single-Lane 		2001 Completed May 2001. ICD estimated from Google Maps linework.
Petaluma, CA
Sonoma Co.
United States 		Magnolia Ave. / Elm Dr.
(38.24586, -122.65600) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
20.6356 		Other (At-Grade)
Single-Lane 		2006 Previously controlled by two-way stop Functional Class: Arterial ICD estimated from Google Maps linework.
Anacortes, WA
Skagit Co.
United States 		Pennsylvania Ave. / W 12th St.
(48.49817, -122.65669) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
 Other (At-Grade)
Single-Lane 		2010 Built for the purpose of traffic calming near a residential park area. Concrete-asphalt.
Langley, BC
Greater Vancouver
Canada 		82 Ave. / 204 St.
(49.15181, -122.65706) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
28.0000 		Other (At-Grade)
Single-Lane 		2017 Year Completed estimated (2016-2017).
Port Orchard, WA
Kitsap Co.
United States 		Tremont St. W / S Kitsap Blvd. / Canyon Ct.
(47.52351, -122.65737) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
40.3258 		Other (At-Grade)
Single-Lane 		2018 ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		NE 7th Ave. / NE Cook St.
(45.54717, -122.65859) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
17.5647 		Other (At-Grade)
Single-Lane 		1992 Completed 1/9/1992. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		NE 7th Ave. / NE Graham St.
(45.54296, -122.65859) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
161.4401 		Other (At-Grade)
Single-Lane 		1992 Completed 1/9/1992. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		NE 7th Ave. / NE Morris St.
(45.54468, -122.65860) 		Traffic Calming Circle
Removed 		One-Way/Two-Way Stop
None 		3 Approaches
0 Driveways
128.8135 		Other (At-Grade)
Single-Lane 		2013 Neighborhood traffic circle was installed 1/9/1992. Removed in 2013 as part of upgrades to the Neighborhood Greenway. Added speed humps nearby. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		NE 7th Ave. / NE Russell St.
(45.54126, -122.65861) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
161.4450 		Other (At-Grade)
Single-Lane 		1992 Completed 1/9/1992. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		NE 7th Ave. / NE Tillamook St. (W)
(45.53790, -122.65861) 		Traffic Calming Circle
Existing 		Unknown
None 		3 Approaches
0 Driveways
83.6552 		Other (At-Grade)
Single-Lane 		1992 Completed 1/9/1992. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		NE 7th Ave. / NE Sacramento St.
(45.53955, -122.65862) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
121.2965 		Other (At-Grade)
Single-Lane 		1992 Completed 1/9/1992. ICD estimated from Google Maps linework.
Langley City, BC
Greater Vancouver
Canada 		203 St. / 53 Ave.
(49.09847, -122.65987) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
25.8060 		Other (At-Grade)
Single-Lane 		2016 https://www.langleyadvancetimes.com/news/langley-citys-first-roundabout-opens/ ICD estimated from Google Maps linework.
Langley, BC
Greater Vancouver
Canada 		202 St. / Trans-Canada Hwy HOV Ramps
(49.16182, -122.66008) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
24.9920 		Freeway Ramps (Grade-Separated)
Single-Lane 		2011 Roundabout in between and below freeway lanes, serving HOV lanes via left-hand ramps on the freeway. Fourth leg (EB onramp and WB offramp) closed off. Year Completed estimated (2008-2013). ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		NE Yacht Harbor Drive
(45.60542, -122.66034) 		Other
Existing 		All-Way Yield
Unknown 		1 Approaches
2 Driveways
25.9020 		Other (At-Grade)
Single-Lane 		2006 N end of Yacht Harbor Drive, yield entry at south, driveway at west and driveway at east. ICD estimated from Google Maps linework.
Vancouver, WA
Clark Co.
United States 		NE 10th Ave. / NE 136th St. / Clark Ave.
(45.71980, -122.66037) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
39.6240 		Other (At-Grade)
Single-Lane 		2011 Clark Ave. is one way exit. May 2011.
Dupont, WA
Thurston Co.
United States 		McNeil St. / Gaul Ave.
(47.09734, -122.66080) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
26.0174 		Other (At-Grade)
Single-Lane 		2001 Completed May 2001. ICD estimated from Google Maps linework.
Vancouver, WA
Clark Co.
United States 		Fort Vancouver Way. / Evergreen Blvd.
(45.62863, -122.66310) 		Other
Existing 		All-Way Stop
Unknown 		4 Approaches
0 Driveways
40.0897 		Other (At-Grade)
Single-Lane 		ICD estimated from Google Maps linework.
Bellingham, WA
Whatcom Co.
United States 		Haxton Way / Smokehouse Rd.
(48.74689, -122.66383) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
37.0136 		Other (At-Grade)
Single-Lane 		2014 ICD estimated from Google Maps linework.
Petaluma, CA
Sonoma Co.
United States 		Windsor Dr. / West Haven Way
(38.22460, -122.66430) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
30.0241 		Other (At-Grade)
Single-Lane 		2005 Functional Class: Collector ICD estimated from Google Maps linework.
Langley Township, BC
Greater Vancouver
Canada 		100A Ave. / 201 St.
(49.18459, -122.66433) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
31.2257 		Other (At-Grade)
Single-Lane 		2009 Year Completed estimated (2008-2009). ICD estimated from Google Maps linework.
Anacortes, WA
Skagit Co.
United States 		SR 20 (Oakes Ave.) / Glasgow Way / Ship Harbor Blvd.
(48.50251, -122.66661) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
30.4800 		Other (At-Grade)
Single-Lane 		2020 https://www.anacorteswa.gov/1172/Ship-Harbor-Boulevard-Roundabout---Compl
Maple Ridge, BC
Greater Vancouver
Canada 		113B Ave. / Golden Ears Way NB Ramps
(49.20927, -122.66722) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
1 Driveways
31.9904 		Freeway Ramps (Grade-Separated)
Single-Lane 		2009 Year Completed estimated (2008-2009). ICD estimated from Google Maps linework.
Pitt Meadows, BC
Greater Vancouver
Canada 		Airport Way / 113B Ave. / Golden Ears Way SB Ramps
(49.20842, -122.67058) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
31.9909 		Freeway Ramps (Grade-Separated)
Single-Lane 		2009 Year Completed estimated (2008-2009). ICD estimated from Google Maps linework.
Dupont, WA
Thurston Co.
United States 		Hoffman Hill Blvd. / Burnside Pl.
(47.09605, -122.67150) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
26.8311 		Other (At-Grade)
Single-Lane 		2004 Completed January 2004. ICD estimated from Google Maps linework.
La Center, WA
Clark Co.
United States 		NW Pacific Hwy. / W 4th St.
(45.86195, -122.67258) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
31.6053 		Other (At-Grade)
Single-Lane 		2018 https://www.clarkcountytoday.com/local_news/the-4th-street-and-pacific-highway-roundabout-in-la-center-completed/ ICD estimated from Google Maps linework.
Dupont, WA
Pierce Co.
United States 		Ridge View Dr. / McNeil St.
(47.10116, -122.67381) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
26.0156 		Other (At-Grade)
Single-Lane 		2007 Originally open pavement; converted to roundabout. Year Completed estimated (2006-2008). ICD estimated from Google Maps linework.
Oak Harbor, WA
Island Co.
United States 		Ault Field Rd. / Heller Rd. / Clover Valley Rd.
(48.32575, -122.67444) 		Roundabout
Existing 		All-Way Yield
Unknown 		3 Approaches
0 Driveways
29.3818 		Other (At-Grade)
Single-Lane 		2018 Previous control type: One-way Yield. ICD estimated from Google Maps linework.
Vancouver, WA
Clark Co.
United States 		NW 5th Pl. / NW 151st St.
(45.72996, -122.67572) 		Other
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		No splitter islands.
Vancouver, WA
Clark Co.
United States 		W. 6th St. / Esther St.
(45.62572, -122.67610) 		Roundabout
Existing 		Unknown
Unknown 		4 Approaches
0 Driveways
29.2336 		Other (At-Grade)
Single-Lane 		2005 Opened June 2005. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SW Terwilliger Blvd. / SW Palater Rd.
(45.45290, -122.67660) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
38.1000 		Other (At-Grade)
Single-Lane 		2002 Roundabout replaces existing Y-intersection, adds fourth leg to serve college law school. Includes driveway into roundabout serving two homes. Roundabout is on tilted plane with central island plane steeper than inscribed circle plane to manage cross slopes. Northeast leg (Palater Road) has 8-9 percent grade down into roundabout, then flattens using a short vertical curve to a zero percent crown at the top of the circulatory roadway. Maximum grade through the roundabout is 4 percent; maximum cross slope is -2 percent. First roundabout under City of Portland jurisdiction.
Pitt Meadows, BC
Greater Vancouver
Canada 		Airport Way / Bonson Rd.
(49.20840, -122.67837) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
28.8699 		Other (At-Grade)
Single-Lane 		2009 ICD estimated from Google Maps linework.
Ridgefield, WA
Clark Co.
United States 		SR 501 / S 65th Ave.
(45.81600, -122.68230) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
46.6147 		Other (At-Grade)
Single-Lane 		2012 ICD estimated from Google Maps linework.
Surrey, BC
Greater Vancouver
Canada 		74 Ave. / 194A St.
(49.13733, -122.68371) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
27.0000 		Other (At-Grade)
Single-Lane 		2019
Surrey, BC
Greater Vancouver
Canada 		194A St. / 73 Ave.
(49.13550, -122.68375) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
30.0000 		Other (At-Grade)
Single-Lane 		2014
Surrey, BC
Greater Vancouver
Canada 		68 Ave. / 194 St.
(49.12637, -122.68530) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
25.0099 		Other (At-Grade)
Single-Lane 		2010 Year Completed estimated (2009-2011 - Streetview). ICD estimated from Google Maps linework.
Nisqually, WA
Thurston Co.
United States 		SR 510 / Yelm Hwy SE
(47.00928, -122.68839) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
62.7079 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2013 Right-turn bypass lane on southwest leg. Open December 2013. ICD estimated from Google Maps linework.
Pitt Meadows, BC
Greater Vancouver
Canada 		Airport Way / Harris Rd.
(49.20811, -122.68974) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
31.2108 		Other (At-Grade)
Single-Lane 		2009 ICD estimated from Google Maps linework.
Lake Oswego, OR
Clackamas Co.
United States 		SW Stafford Rd. / SW Rosemont Rd.
(45.39300, -122.69020) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
42.7740 		Other (At-Grade)
Single-Lane 		2005 ICD estimated from Google Maps linework.
Ridgefield, WA
Clark Co.
United States 		SR 501 / S 56th Pl.
(45.81582, -122.69070) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
48.2796 		Other (At-Grade)
Single-Lane 		2012 ICD estimated from Google Maps linework.
Nisqually, WA
Thurston Co.
United States 		SR 510 / Reservation Rd. SE
(47.01164, -122.69148) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
48.7680 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2013 Reverse curves on west and east legs. Open November 2013.
Surrey, BC
Greater Vancouver Regional District
Canada 		190 St. / 68 Ave.
(49.12626, -122.69620) 		Roundabout
Existing 		Unknown
Unknown 		0 Approaches
0 Driveways
26.5731 		Other (At-Grade)
Single-Lane 		2007 ICD estimated from Google Maps linework.
Port Orchard, WA
Kitsap Co.
United States 		SW Old Clifton Rd. / Campus Pkwy. / McCormick Village Dr.
(47.50505, -122.69904) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
36.5760 		Other (At-Grade)
Single-Lane 		2021 Year Completed estimated (2021-2022).
Silverdale, WA
Kitsap Co.
United States 		Silverdale Way NW / Chico Way NW / NW Newberry Hill Rd.
(47.63704, -122.70135) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
15.2906 		Other (At-Grade)
Single-Lane 		2012 Open September 2012. ICD estimated from Google Maps linework.
Ridgefield, WA
Clark Co.
United States 		NW La Center Rd. / I-5 NB Ramps
(45.85214, -122.70160) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
51.8160 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2017 Part of Ilani Casino interchange project.
Surrey, BC
Greater Vancouver Regional District
Canada 		188 St. / 68 Ave.
(49.12614, -122.70170) 		Roundabout
Existing 		Unknown
Unknown 		0 Approaches
0 Driveways
25.7916 		Other (At-Grade)
Single-Lane 		2007 ICD estimated from Google Maps linework.
(unincorporated), OR
Clackamas Co.
United States 		SW Stafford Rd. / SW Borland Rd.
(45.37472, -122.70240) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
53.6945 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2008 ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		NW 25th Ave. / NW Overton St.
(45.53190, -122.70270) 		Traffic Calming Circle
Existing 		One-Way/Two-Way Stop
None 		4 Approaches
0 Driveways
44.3420 		Other (At-Grade)
Single-Lane 		1988 Completed 9/30/1988. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		NW 25th Ave. / NW Marshall St.
(45.53040, -122.70270) 		Traffic Calming Circle
Existing 		One-Way/Two-Way Stop
None 		4 Approaches
0 Driveways
62.7498 		Other (At-Grade)
Single-Lane 		1988 Completed 9/30/1988. ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		NW 25th Ave. / NW Quimby St.
(45.53328, -122.70277) 		Traffic Calming Circle
Existing 		One-Way/Two-Way Stop
None 		3 Approaches
0 Driveways
15.8958 		Other (At-Grade)
Single-Lane 		1988 Completed 9/30/1988. ICD estimated from Google Maps linework.
Ridgefield, WA
Clark Co.
United States 		S. Royle Rd. / Settler Dr. (S 45th Ave. / S 3rd Way)
(45.81379, -122.70283) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
48.7680 		Other (At-Grade)
Multilane (2 Lane, unspecified) 		2019 This is the 5th roundabout in the City of Ridgefield.
Ridgefield, WA
Clark Co.
United States 		SR 501 (Pioneer St.) / 45th Ave.
(45.81568, -122.70290) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
42.4529 		Other (At-Grade)
Single-Lane 		2007 Opened August 16, 2007. http://www.wsdot.wa.gov/News/2007/08/06_SR501Roundabouts.htm. Rural. ICD estimated from Google Maps linework.
Silverdale, WA
Kitsap Co.
United States 		NW Anderson Hill Rd. / Frontier Pl. NW
(47.65368, -122.70350) 		Roundabout
Existing 		Unknown
Unknown 		3 Approaches
0 Driveways
21.7218 		Other (At-Grade)
Single-Lane 		2003 Opened September 2003. ICD estimated from Google Maps linework.
Ridgefield, WA
Clark Co.
United States 		NW 319th St. / I-5 SB Ramps
(45.85163, -122.70380) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
48.7680 		Freeway Ramps (Grade-Separated)
Multilane (2 Lane, unspecified) 		2017 Part of Ilani Casino interchange project.
Ferndale, WA
Whatcom Co.
United States 		SR 548 (Grandview Rd.) / Kickerville Rd.
(48.89209, -122.70435) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
 Other (At-Grade)
Single-Lane 		2018
Portland, OR
Multnomah Co.
United States 		NW 26th Ave. / NW Raleigh St.
(45.53397, -122.70479) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
19.2420 		Other (At-Grade)
Single-Lane 		1988 Completed 9/30/1988. ICD estimated from Google Maps linework.
Ridgefield, WA
Clark Co.
United States 		NW 319th St. / NW 31st Ave.
(45.85093, -122.70594) 		Roundabout
Existing 		All-Way Yield
Unknown 		4 Approaches
0 Driveways
48.7680 		Other (At-Grade)
Multilane (2 Lane, 2x1 max) 		2017 Part of Ilani Casino interchange project.
Portland, OR
Multnomah Co.
United States 		NW 27th Ave. / NW Raleigh St.
(45.53395, -122.70680) 		Traffic Calming Circle
Existing 		Unknown
None 		4 Approaches
0 Driveways
10.0393 		Other (At-Grade)
Single-Lane 		1988 Completed 9/30/1988. ICD estimated from Google Maps linework.
Rohnert Park, CA
Sonoma Co.
United States 		Commerce Blvd. / Southwest Blvd.
(38.33615, -122.71171) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
0.0000 		Other (At-Grade)
Single-Lane 		2022 https://www.pressdemocrat.com/article/news/rohnert-park-roundabout-completed-opens-wednesday/?artslide=0
Ridgefield, WA
Clark Co.
United States 		35th Avenue / Pioneer Street (WA SR-501)
(45.81557, -122.71310) 		Roundabout
Existing 		All-Way Yield
None 		4 Approaches
0 Driveways
37.4585 		Other (At-Grade)
Single-Lane 		2018 ICD estimated from Google Maps linework.
Portland, OR
Multnomah Co.
United States 		SW 47th Dr. / SW 43rd Ave.
(45.49245, -122.72111) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
54.4198 		Other (At-Grade)
Single-lane w/ Traversable Central Island 		2007 Completed 4/29/2007. Painted but unraised central island. No splitter islands. ICD estimated from Google Maps linework.
Port Orchard, WA
Kitsap Co.
United States 		SW Lake Flora Rd. / JM Dickenson Rd. SW
(47.46497, -122.72410) 		Roundabout
Existing 		All-Way Yield
None 		3 Approaches
0 Driveways
33.9114 		Other (At-Grade)
Single-Lane 		2011 https://pugetsoundblogs.com/roadwarrior/tag/lake-flora/ ICD estimated from Google Maps linework.