| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| Billings,
                MT Yellowstone Co. United States | Shiloh Rd. / Central Ave. (45.76963, -108.61760) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 53.3183 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2010 | Series of 8 roundabouts. Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| Billings,
                MT Yellowstone Co. United States | Shiloh Rd. / Monad Rd. (45.76236, -108.61760) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 46.6596 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2010 | Series of 8 roundabouts. Previously controlled by two-way stop Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| Billings,
                MT Yellowstone Co. United States | Shiloh Rd. / King Ave. (45.75507, -108.61760) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 58.3321 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2010 | Series of 8 roundabouts. Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| Billings,
                MT Yellowstone Co. United States | Shiloh Rd. / (Local Access) (45.74776, -108.61750) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 37.5041 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2010 | Series of 8 roundabouts. Main access to construction materials facility (600+ trucks per day). Previously controlled by two-way stop Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| Billings,
                MT Yellowstone Co. United States | Shiloh Rd. / Hesper Rd. (45.74060, -108.61740) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 43.3436 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Series of 8 roundabouts. Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| Billings,
                MT Yellowstone Co. United States | Shiloh Rd. / Zoo Dr. (45.73609, -108.61740) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 41.6799 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Series of 8 roundabouts. Previously controlled by two-way stop Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| Nassau,
                New Providence Nassau The Bahamas | Independence Dr. / East St. (25.04569, -77.34169) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 55.1833 | Other (At-Grade) Multilane (2 Lane, unspecified) | ICD estimated from Google Maps linework. | |
| Fairfield Township,
                OH Butler Co. United States | Hamilton Mason Rd. / Liberty Fairfield Rd. (39.37527, -84.48046) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.6219 | Other (At-Grade) Single-Lane | 2008 | Since completion, has reduced accidents by 80%. Replaced two offset T intersections. Previously controlled by two-way stop Functional Class: Major Collector ICD estimated from Google Maps linework. | 
| Lexington Park,
                MD St. Marys Co. United States | Tate Rd. / Shaw Rd. (38.26955, -76.42012) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 31.8809 | Other (At-Grade) Single-Lane | 2005 | Y-shaped with right-turn bypass lanes. ICD estimated from Google Maps linework. | 
| Morro Bay,
                CA San Luis Obispo Co. United States | Morro Bay Blvd. / Quintana Rd. (35.36641, -120.84100) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 1 Driveways 31.1659 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | ICD estimated from Google Maps linework. | 
| North Auburn,
                CA Placer Co. United States | Willow Creek / 1st St. (38.93790, -121.10060) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 38.0883 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| Anacortes,
                WA Skagit Co. United States | Commercial Ave. / SR20 Spur (48.49332, -122.61280) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 34.8256 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| Ladera Ranch,
                CA Orange Co. United States | Michael Rd. / Cambridge Ethereal Rd. (33.53294, -117.64460) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 26.8800 | Other (At-Grade) Single-Lane | 2006 | Functional Class: Local ICD estimated from Google Maps linework. | 
| San Diego,
                CA San Diego Co. United States | La Jolla Blvd. / Forward St. (32.81379, -117.26950) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 22.0827 | Other (At-Grade) Single-Lane | 2008 | Series of 5 roundabouts. ICD estimated from Google Maps linework. | 
| 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. | 
| Everett,
                WA Snohomish Co. United States | 13th St. / 1st Ave. (48.00026, -122.21570) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 27.1714 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| Ferndale,
                WA Whatcom Co. United States | I-5 SB Ramps / 2nd St. / Portal Way (48.85686, -122.58840) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.8616 | Other (At-Grade) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| San Diego,
                CA San Diego Co. United States | La Jolla Hermosa Ave. / Forward St. (32.81402, -117.26840) | Traffic Calming Circle Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 25.0939 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Issaquah,
                WA King Co. United States | East Lake Sammamish Parkway / SE 43rd Way (47.56792, -122.05500) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 38.6799 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | ICD estimated from Google Maps linework. | 
| San Diego,
                CA San Diego Co. United States | La Jolla Blvd. / Bird Rock Ave. (32.81559, -117.27060) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 21.0785 | Other (At-Grade) Single-Lane | 2008 | Series of 5 roundabouts. ICD estimated from Google Maps linework. | 
| Lake Stevens,
                WA Snohomish Co. United States | Lundeen Parkway / Soper Hill Rd. (48.01557, -122.10010) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 29.5601 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2010 | ICD estimated from Google Maps linework. | 
| San Diego,
                CA San Diego Co. United States | La Jolla Blvd. / Camino de la Costa (32.81756, -117.27190) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 23.0854 | Other (At-Grade) Single-Lane | 2008 | Series of 5 roundabouts. ICD estimated from Google Maps linework. | 
| Ocean Shores,
                WA Grays Harbor Co. United States | Point Brown Ave / Chance a la Mer (47.00745, -124.16140) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 39.9064 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | ICD estimated from Google Maps linework. | 
| Granite Falls,
                WA Snohomish Co. United States | Granite Falls Access Rd. / Burn Rd. (NE 100th St.) (48.08656, -121.99060) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.2954 | Other (At-Grade) Single-Lane | 2010 | November 2010. ICD estimated from Google Maps linework. | 
| Granite Falls,
                WA Snohomish Co. United States | Granite Falls Access Rd. / Jordan Rd (48.09135, -121.97980) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 55.0445 | Other (At-Grade) Single-Lane | 2010 | November 2010. ICD estimated from Google Maps linework. | 
| Granite Falls,
                WA Snohomish Co. United States | Granite Falls Access Rd. / SR 92 (48.08332, -121.99000) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 38.2978 | Other (At-Grade) Single-Lane | 2010 | May 2010. ICD estimated from Google Maps linework. | 
| Nassau,
                New Providence Nassau The Bahamas | Nassau St. / Thompson Blvd. / Poinciana Dr. (25.06443, -77.35457) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 51.9293 | Other (At-Grade) Multilane (2 Lane, unspecified) | ICD estimated from Google Maps linework. | |
| Swinomish Tribal Community,
                WA Skagit Co. United States | Knudsen Ln. / Casino Dr. (48.45635, -122.51910) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.2668 | Other (At-Grade) Single-Lane | 2013 | Year Completed estimated (2012-2013). ICD estimated from Google Maps linework. | 
| Yakima,
                WA Yakima Co. United States | E Valley Mall Blvd. / S Rudkin Rd. (46.56300, -120.47520) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 35.3102 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2010 | Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Yakima,
                WA Yakima Co. United States | E. Valley Mall Blvd. / I-82 EB Ramps (46.56298, -120.47290) | Roundabout Existing | Unknown Unknown | 5 Approaches 0 Driveways 54.1971 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2010 | ICD estimated from Google Maps linework. | 
| Yakima,
                WA Yakima Co. United States | E. Valley Mall Blvd. / I-82 WB Ramps (46.56298, -120.47170) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 98.5403 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2011 | ICD estimated from Google Maps linework. | 
| Sammamish,
                WA King Co. United States | 244th Ave NE / NE 8th St (47.61673, -122.01390) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.0083 | Other (At-Grade) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| Sammamish,
                WA King Co. United States | 244th Ave. NE / E Main Dr. (47.60881, -122.01390) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 22.5457 | Other (At-Grade) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| Wenatchee,
                WA Chelan Co. United States | Riverside Dr. / 5th St. (47.43215, -120.31267) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 25.0455 | Other (At-Grade) Single-Lane | 2009 | October 2009. ICD estimated from Google Maps linework. | 
| Lynden,
                WA Whatcom Co. United States | SR 539 / Ten Mile Rd. (48.86968, -122.48580) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 46.3503 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | ICD estimated from Google Maps linework. | 
| Lynden,
                WA Whatcom Co. United States | SR 539 / Pole Rd. (48.89152, -122.48560) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 47.1153 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | ICD estimated from Google Maps linework. | 
| Lynden,
                WA Whatcom Co. United States | SR 539 / Wiser Lake Rd. (48.90677, -122.48560) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 47.1009 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | ICD estimated from Google Maps linework. | 
| Fort Mill,
                SC York Co. United States | Assembly Dr. / First Baxter Crossing (35.02980, -80.96839) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 53.7889 | Other (At-Grade) Single-Lane | 2000 | Year Completed estimated (1998-2002). ICD estimated from Google Maps linework. | 
| Carmel,
                IN Hamilton Co. United States | Oakridge Rd. / Adios Pass (39.98876, -86.14577) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.6024 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Tallmadge,
                OH Summit Co. United States | Howe Rd. / Northeast Ave. / N Munroe Rd. (41.11800, -81.41503) | Roundabout Existing | Unknown Unknown | 6 Approaches 0 Driveways 52.1858 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2010 | Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Kemptville,
                ON United Counties of Leeds and Grenville Canada | CR 43 / Pinehill Rd. (45.01836, -75.65872) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 32.0814 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| Kemptville,
                ON United Counties of Leeds and Grenville Canada | CR 43 / (Colonnade entrance) (45.03069, -75.63316) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 43.0473 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | ICD estimated from Google Maps linework. | 
| Odessa,
                ON Lennox and Addington Canada | CR 2 / CR 4 (44.26179, -76.77489) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 38.4898 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| Carmel,
                IN Hamilton Co. United States | Oakridge Rd. / Bennett Rd. (39.99594, -86.14580) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.8536 | Other (At-Grade) Single-Lane | 2005 | ICD estimated from Google Maps linework. | 
| Baton Rouge,
                LA East Baton Rouge Par. United States | Lovett Rd. / (Magnolia Square subdivision) (30.52095, -91.03818) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 18.5192 | Other (At-Grade) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| Princeton Junction,
                NJ Mercer Co. United States | Post Rd. / Alexander Rd. (40.31186, -74.62854) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 29.1429 | Other (At-Grade) Single-Lane | 2009 | Previously controlled by one-way stop ICD estimated from Google Maps linework. | 
| Azusa,
                CA Los Angeles Co. United States | Sierra Madre Ave. / Vosberg Dr. (34.14674, -117.90260) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.5835 | Other (At-Grade) Single-Lane | 2008 | Built near a single-family housing project that was previously a large nursery. ICD estimated from Google Maps linework. | 
| Azusa,
                CA Los Angeles Co. United States | Sierra Madre Ave. / Macneil Dr. (34.14662, -117.89040) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.5835 | Other (At-Grade) Single-Lane | 2008 | Built on single-family home project that was previously a large nursery. ICD estimated from Google Maps linework. | 
| Azusa,
                CA Los Angeles Co. United States | The Promenade / (unknown) (34.13805, -117.89310) | Other Existing | Unknown None | 3 Approaches 0 Driveways 34.5986 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Champaign,
                IL Champaign Co. United States | English Oak Dr. / (unknown) (40.10075, -88.32784) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 28.3203 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| Cheyenne,
                WY Laramie Co. United States | High Plains Rd. / I-25 SB Ramps (41.06202, -104.87730) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 50.4293 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| Redmond,
                WA King Co. United States | Eastridge Dr. NE / 244th Pl. NE (47.68499, -122.01300) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 16.8846 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2014 | Open July 2014. ICD estimated from Google Maps linework. | 
| Cheektowaga,
                NY Erie Co. United States | Harlem Rd. / Cleveland Dr. (42.94493, -78.78408) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 44.5872 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | ICD estimated from Google Maps linework. | 
| Round Lake,
                NY Saratoga Co. United States | Rte. 9-Rte. 67 / Round Lake Bypass (42.94849, -73.78979) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 52.4525 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | ICD estimated from Google Maps linework. | 
| Lackawanna,
                NY Erie Co. United States | McKinley Pkwy. / Dorrance Ave. / Vincent Ave. (42.83200, -78.81520) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 30.6551 | Other (At-Grade) Single-Lane | 2010 | Restriped as single-lane roundabout. ICD estimated from Google Maps linework. | 
| Lackawanna,
                NY Erie Co. United States | McKinley Pkwy. / Choate Ave. / Red Jacket Pkwy. (42.84436, -78.81496) | Other Existing | Unknown Unknown | 5 Approaches 0 Driveways 138.3584 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Lackawanna,
                NY Erie Co. United States | Dorrance Ave. / S. Shore Blvd. / Ward Ct. (42.83199, -78.80859) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.0345 | Other (At-Grade) Single-Lane | 2010 | Restriped as single-lane roundabout. ICD estimated from Google Maps linework. | 
| West Jordan,
                UT Salt Lake Co. United States | 4800 W / 7600 S (40.61269, -112.00540) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.8260 | Other (At-Grade) Single-Lane | 2008 | Fourth leg added. Previously controlled by one-way stop ICD estimated from Google Maps linework. | 
| Rome,
                NY Oneida Co. United States | SR 825 / Ellsworth Rd. (43.21731, -75.41796) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 55.7044 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2002 | Constructed in old air force base. ICD estimated from Google Maps linework. | 
| Corning,
                NY Steuben Co. United States | Robert Dann Blvd. / Aurene Dr. / Creekside Dr. (42.16506, -77.11484) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.7216 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2003 | Access permits for research and development plant. ICD estimated from Google Maps linework. | 
| San Clemente,
                CA Orange Co. United States | Calle Las Bolsa / Boca de la Playa (33.43215, -117.63000) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 22.9244 | Other (At-Grade) Single-Lane | 2006 | Functional Class: Local ICD estimated from Google Maps linework. | 
| West Valley,
                UT Salt Lake Co. United States | Lake Park Blvd. / S 4800 W (40.71236, -112.00900) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 52.5070 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | ICD estimated from Google Maps linework. | 
| Niagara Falls,
                NY Niagara Co. United States | Rainbow Blvd. / 1st St. (43.08466, -79.06161) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.2741 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| Cheyenne,
                WY Laramie Co. United States | High Plains Rd. / I-25 NB Ramps (41.06046, -104.87620) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 55.8337 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | Only 3 of the 5 approaches are currently in service. One is under construction for the new Southeast Wyoming Welcome Center. The last is a future extension of High Plains to the east. ICD estimated from Google Maps linework. | 
| Cheyenne,
                WY Laramie Co. United States | Snyder Ave. / Allison Rd. (41.11004, -104.81910) | Roundabout Existing | All-Way Yield None | 4 Approaches 1 Driveways 27.8958 | Other (At-Grade) Single-Lane | 2008 | South High School is on south leg. Functional Class: Collector ICD estimated from Google Maps linework. | 
| Cheyenne,
                WY Laramie Co. United States | Converse Ave. / Pershing Blvd. / 19th St. (41.14558, -104.78960) | Roundabout Existing | All-Way Yield Rectangular Rapid Flashing Beacon (RRFB) | 5 Approaches 0 Driveways 36.8745 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2013 | Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| Cheyenne,
                WY Laramie Co. United States | H.R. Ranch Rd. / Judy Lee Dr. (41.12408, -104.73770) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 29.6892 | Other (At-Grade) Single-Lane | 2008 | Functional Class: Collector ICD estimated from Google Maps linework. | 
| Cheyenne,
                WY Laramie Co. United States | Vandehei Ave. / I-25 NB Ramps / Hynds Blvd. (41.18365, -104.83710) | Roundabout Existing | All-Way Yield None | 6 Approaches 0 Driveways 46.7405 | Freeway Ramps (Grade-Separated) Single-Lane | 2011 | Previously controlled by one-way stop ICD estimated from Google Maps linework. | 
| Cheyenne,
                WY Laramie Co. United States | Vandehei Ave. / I-25 SB Ramps / Bishop Blvd. (41.18365, -104.83900) | Roundabout Existing | All-Way Yield None | 6 Approaches 0 Driveways 44.9428 | Freeway Ramps (Grade-Separated) Single-Lane | 2011 | Previously controlled by one-way stop ICD estimated from Google Maps linework. | 
| Batavia,
                NY Genesee Co. United States | Rte 33 / Rte 98 (42.99869, -78.19249) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.1808 | Other (At-Grade) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| Chatham,
                NY Columbia Co. United States | Rte 66 / Rte 295 (42.36392, -73.59497) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 22.9441 | Other (At-Grade) Single-Lane | 2009 | Small single-laner in village setting. ICD estimated from Google Maps linework. | 
| Ithaca,
                NY Tompkins Co. United States | Spencer St. / Elmira Rd. / Park St. / Albany St. (42.43167, -76.50152) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 34.3790 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Greenwich,
                NY Washington Co. United States | Rte 29 / Rte 40 (43.10361, -73.51842) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 38.3681 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Plattsburgh,
                NY Clinton Co. United States | Rte 9 / New York Rd. / Vermont St. (44.68128, -73.44769) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 37.3649 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Liberty,
                NY Sullivan Co. United States | Rte 17 SB Ramps / Rte 52 (41.79303, -74.73518) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.9463 | Other (At-Grade) Single-Lane | 2006 | ICD estimated from Google Maps linework. | 
| Liberty,
                NY Sullivan Co. United States | Rte 52 / Rte 55 (41.79688, -74.74020) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 30.2731 | Other (At-Grade) Single-Lane | 2006 | ICD estimated from Google Maps linework. | 
| Cortlandt Manor,
                NY Northern Westchester Co. United States | Oregon Rd. / Jay Rd. / Westbrook Ct. (41.32445, -73.88305) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 30.4953 | Other (At-Grade) Single-Lane | 2006 | ICD estimated from Google Maps linework. | 
| Mount Vernon,
                NY Westchester Co. United States | Lincoln Ave. / Gramatan Ave. (40.91744, -73.83753) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.1000 | Other (At-Grade) Single-Lane | 2006 | Central island has fountain and music ICD estimated from Google Maps linework. | 
| Caledonia,
                NY Livingston Co. United States | Rte 5 / Rte 383 (42.97311, -77.85300) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.0896 | Other (At-Grade) Single-Lane | 2005 | Resigned and restriped traffic circle. Previously controlled by circle ICD estimated from Google Maps linework. | 
| Stony Brook,
                NY Suffolk Co. United States | S. Loop Rd. / Marburger Dr. (40.90982, -73.12318) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 36.1041 | Other (At-Grade) Single-Lane | 2006 | On college campus roadway. ICD estimated from Google Maps linework. | 
| Westchester,
                NY Westchester Co. United States | Airport Rd. / Rye Lake Rd. (41.07284, -73.70593) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 31.5131 | Other (At-Grade) Single-Lane | 2006 | Access to airport. ICD estimated from Google Maps linework. | 
| Westhampton Beach,
                NY Suffolk Co. United States | Potunk Ln. / Oak St. / School St. / Brook Rd. / Mill Rd. (40.81412, -72.64636) | Roundabout Existing | All-Way Yield None | 6 Approaches 0 Driveways 39.7720 | Other (At-Grade) Single-Lane | 2006 | Oval shape. ICD estimated from Google Maps linework. | 
| Poughkeepsie,
                NY Dutchess Co. United States | Rte 376 / Vassar Lake Dr. (41.68654, -73.89823) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 18.7303 | Other (At-Grade) Single-Lane | 2006 | Near Vassar College ICD estimated from Google Maps linework. | 
| Poughkeepsie,
                NY Dutchess Co. United States | Rte 376 / College Ave. (41.68975, -73.89973) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 26.7562 | Other (At-Grade) Single-Lane | 2006 | Near Vassar College ICD estimated from Google Maps linework. | 
| Poughkeepsie,
                NY Dutchess Co. United States | Rte 376 / Collegeview Ave. (41.69179, -73.90046) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.3227 | Other (At-Grade) Single-Lane | 2008 | Near Vassar College ICD estimated from Google Maps linework. | 
| Bainbridge,
                NY Chenango Co. United States | Rte 206 / CR 39 (42.29073, -75.47471) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.5727 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| Latham,
                NY Albany Co. United States | Old Wolf Rd. / Old Niskayuna Rd. (42.73882, -73.79072) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.8241 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| North Providence,
                RI Providence Co. United States | US 44 / Centerdale Bypass (41.85703, -71.48295) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 30.2447 | Other (At-Grade) Single-Lane | 2002 | ICD estimated from Google Maps linework. | 
| Lincoln,
                RI Providence Co. United States | Twin River Rd. / (unknown) (41.89224, -71.45074) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 47.1202 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2006 | ICD estimated from Google Maps linework. | 
| Auburn,
                WA King Co. United States | 124 Ave. SE / SE 304th St. (47.32978, -122.17640) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.1891 | Other (At-Grade) Single-Lane | 2008 | July 2008. ICD estimated from Google Maps linework. | 
| Blaine,
                WA Whatcom Co. United States | I-5 SB Ramps / Peace Portal Dr. / Marine Dr. (48.99723, -122.75250) | Roundabout Existing | All-Way Yield At-grade Rail Crossing Signals/Gates (controlling approach only) | 4 Approaches 0 Driveways 26.6422 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | May 2010. Roundabout is ~200 ft from railroad crossing. ICD estimated from Google Maps linework. | 
| Blaine,
                WA Whatcom Co. United States | I-5 NB Ramps / D St. / 2nd St. (48.99810, -122.75140) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.6939 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | May 2010. ICD estimated from Google Maps linework. | 
| Cheektowaga,
                NY Erie Co. United States | Harlem Rd. / Kensington Rd. / Lexington Ter. (42.95023, -78.78391) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.7223 | Other (At-Grade) Single-Lane | 2008 | Closely spaced roundabouts 100 feet apart. ICD estimated from Google Maps linework. | 
| Cheektowaga,
                NY Erie Co. United States | Harlem Rd. / Kensington Rd. / Wehrle Dr. (42.94968, -78.78409) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.0870 | Other (At-Grade) Single-Lane | 2008 | Closely spaced roundabouts 100 feet apart. ICD estimated from Google Maps linework. | 
| Irondequoit,
                NY Monroe Co. United States | Rte 590 / Titus Ave. (43.21195, -77.54978) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.3001 | Other (At-Grade) Single-Lane | 2010 | Series of 4 roundabouts. ICD estimated from Google Maps linework. | 
| Irondequoit,
                NY Monroe Co. United States | Rte 590 / Seneca Rd. (43.21642, -77.54655) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.2973 | Other (At-Grade) Single-Lane | 2010 | Series of 4 roundabouts. ICD estimated from Google Maps linework. | 
| Irondequoit,
                NY Monroe Co. United States | Rte 590 / Point Pleasant Rd. (43.22389, -77.54493) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.2926 | Other (At-Grade) Single-Lane | 2010 | Series of 4 roundabouts. ICD estimated from Google Maps linework. | 
| Irondequoit,
                NY Monroe Co. United States | Rte 590 / Durand Blvd. (43.22728, -77.54431) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.5500 | Other (At-Grade) Single-Lane | 2010 | Series of 4 roundabouts. ICD estimated from Google Maps linework. | 
| Bremerton,
                WA Kitsap Co. United States | Cross SKIA Connector / Harry Earl Rd. (47.50340, -122.75060) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 32.2730 | Other (At-Grade) Single-Lane | 2010 | September 2010. ICD estimated from Google Maps linework. | 
| Covington,
                WA King Co. United States | 168th Pl. SE / Fred Meyer Entrance (47.35698, -122.11680) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 105.1794 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | November 2008. Entrance into Fred Meyer shopping center. ICD estimated from Google Maps linework. |