| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| Lenexa,
                KS Johnson Co. United States | Prairie Star Pkwy. / Dunraven St. (38.95644, -94.85867) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 53.8668 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Opened May 2009. Series of 7 roundabouts. ICD estimated from Google Maps linework. | 
| Lenexa,
                KS Johnson Co. United States | Prairie Star Pkwy. / Gleason Rd. (38.95645, -94.86272) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 51.0806 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Opened May 2009. Series of 7 roundabouts. ICD estimated from Google Maps linework. | 
| Lenexa,
                KS Johnson Co. United States | Prairie Star Pkwy. / McCormack Dr. (38.95703, -94.86583) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 52.9377 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Opened May 2009. Series of 7 roundabouts. ICD estimated from Google Maps linework. | 
| Lenexa,
                KS Johnson Co. United States | Prairie Star Pkwy. / High School West (38.95897, -94.86850) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 51.0788 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Opened May 2009. Series of 7 roundabouts. ICD estimated from Google Maps linework. | 
| Lenexa,
                KS Johnson Co. United States | Prairie Star Pkwy. / Clare Rd. (38.95972, -94.87209) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 56.6504 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Opened May 2009. Intersection of series of 7 roundabouts and series of 5 roundabouts. ICD estimated from Google Maps linework. | 
| Lenexa,
                KS Johnson Co. United States | Prairie Star Pkwy. / Shady Bend Rd. (38.95950, -94.87614) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 50.1497 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Opened May 2009. Series of 7 roundabouts. ICD estimated from Google Maps linework. | 
| Lenexa,
                KS Johnson Co. United States | Prairie Star Pkwy. / Canyon Creek Pkwy. (38.95767, -94.87938) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 57.5808 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Opened May 2009. Series of 7 roundabouts. ICD estimated from Google Maps linework. | 
| Lenexa,
                KS Johnson Co. United States | Clare Rd. / 86th Terr. (38.97160, -94.87243) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.0706 | Other (At-Grade) Single-Lane | 2010 | Series of 5 roundabouts. ICD estimated from Google Maps linework. | 
| Lenexa,
                KS Johnson Co. United States | Clare Rd. / 88th Terr. (38.96687, -94.87220) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.4800 | Other (At-Grade) Single-Lane | 2010 | Series of 5 roundabouts. | 
| Lenexa,
                KS Johnson Co. United States | Clare Rd. / 89th Terr. (38.96470, -94.87216) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 26.0017 | Other (At-Grade) Single-Lane | 2010 | Series of 5 roundabouts. ICD estimated from Google Maps linework. | 
| Lenexa,
                KS Johnson Co. United States | Clare Rd. / 92nd St. (38.96217, -94.87213) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.0739 | Other (At-Grade) Single-Lane | 2010 | Series of 5 roundabouts. ICD estimated from Google Maps linework. | 
| Lenexa,
                KS Johnson Co. United States | Renner Blvd. / Parking Lot Entrance (38.95781, -94.77966) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 49.2222 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2007 | ICD estimated from Google Maps linework. | 
| Lenexa,
                KS Johnson Co. United States | Monticello Rd. / (unknown #1) (38.96697, -94.84409) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.2868 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| Lenexa,
                KS Johnson Co. United States | Monticello Rd. / (unknown #2) (38.96972, -94.84409) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.0712 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| Lenexa,
                KS Johnson Co. United States | Monticello Rd. / Gun Club (38.97326, -94.84428) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 35.2837 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| Basehor,
                KS Leavenworth Co. United States | (unknown) / (unknown) (39.13707, -94.93648) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 34.2756 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | ICD estimated from Google Maps linework. | 
| Basehor,
                KS Leavenworth Co. United States | (unknown) / Parking Lot (39.13799, -94.93220) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.6434 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| Overland Park,
                KS Johnson Co. United States | 157th St. / King St. (38.84201, -94.71545) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 40.9304 | Other (At-Grade) Single-Lane | 2007 | Built for new development. ICD estimated from Google Maps linework. | 
| Olathe,
                KS Johnson Co. United States | Access Rd. / Bass Pro entrance (38.91125, -94.77769) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.0919 | Other (At-Grade) Single-Lane | 2007 | Opened February 2007. Access to Bass Pro retail center. ICD estimated from Google Maps linework. | 
| Olathe,
                KS Johnson Co. United States | Renner Rd. / North Bass Pro entrance (38.91125, -94.77965) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 34.3852 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2007 | Opened February 2007. Access to Bass Pro retail center. ICD estimated from Google Maps linework. | 
| Olathe,
                KS Johnson Co. United States | Renner Rd. / South Bass Pro entrance (38.90922, -94.77960) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 31.5981 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2007 | Opened February 2007. Access to Bass Pro retail center. ICD estimated from Google Maps linework. | 
| Olathe,
                KS Johnson Co. United States | Kansas City Rd. / Nelson Rd. / Church St. (38.88896, -94.80412) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 24.1702 | Other (At-Grade) Single-Lane | 2004 | Previously controlled by two-way stop ICD estimated from Google Maps linework. | 
| Olathe,
                KS Johnson Co. United States | Kansas City Rd. / Buchanan St. / Prairie St. (38.88704, -94.80763) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 26.9598 | Other (At-Grade) Single-Lane | 2004 | Previously controlled by two-way stop ICD estimated from Google Maps linework. | 
| Olathe,
                KS Johnson Co. United States | 118th St. / Greenwood St. (38.91447, -94.75040) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 35.3130 | Other (At-Grade) Single-Lane | 2005 | ICD estimated from Google Maps linework. | 
| Olathe,
                KS Johnson Co. United States | Indian Wells Dr. / Spruce St. (38.88568, -94.85022) | Roundabout Removed | All-Way Yield None | 2 Approaches 0 Driveways 44.6239 | Other (At-Grade) Single-Lane | 2002 | Replaced in 2015 with new roundabout in location shifted slightly to west. ICD estimated from Google Maps linework. | 
| Olathe,
                KS Johnson Co. United States | S Warwick St. / 165th St. (38.82870, -94.80401) | Roundabout Existing | All-Way Yield None | 2 Approaches 0 Driveways 26.0515 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| Olathe,
                KS Johnson Co. United States | 167th St. / Lindenwood Dr. (38.82558, -94.78903) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.8703 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Built for new development. Series of 3 roundabouts. ICD estimated from Google Maps linework. | 
| Olathe,
                KS Johnson Co. United States | 167th St. / Mur-Len St. (38.82566, -94.77972) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 50.2443 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Built for new development. Series of 3 roundabouts. ICD estimated from Google Maps linework. | 
| Olathe,
                KS Johnson Co. United States | 167th St. / (unknown) (38.82562, -94.77064) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 43.7312 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Built for new development. Series of 3 roundabouts. ICD estimated from Google Maps linework. | 
| Merriam,
                KS Johnson Co. United States | Carter St. / Turkey Creek Dr. (39.00353, -94.69585) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 28.7718 | Other (At-Grade) Single-Lane | 2008 | Built for new development. ICD estimated from Google Maps linework. | 
| Manhattan,
                KS Riley Co. United States | 4th St. / Bluemont Ave. (39.18669, -96.56160) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.6571 | Other (At-Grade) Single-Lane | 2010 | Previously controlled by two-way stop ICD estimated from Google Maps linework. | 
| Topeka,
                KS Shawnee Co. United States | Wanamaker Rd. / 37th St. (39.00010, -95.76231) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.7675 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2006 | Opened June 2006. Previously controlled by two-way stop ICD estimated from Google Maps linework. | 
| Topeka,
                KS Shawnee Co. United States | Wanamaker Rd. / 41st St. (38.99257, -95.76227) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 50.1263 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2006 | Opened June 2006. Previously controlled by two-way stop ICD estimated from Google Maps linework. | 
| Topeka,
                KS Shawnee Co. United States | Wanamaker Rd. / 53rd St. (38.97103, -95.76216) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.4277 | Other (At-Grade) Single-Lane | 2007 | Previously controlled by two-way stop ICD estimated from Google Maps linework. | 
| Topeka,
                KS Shawnee Co. United States | NW 46th St. / Oakley Ave. / Hunters Ridge Dr. (39.12937, -95.71753) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.6911 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2010 | ICD estimated from Google Maps linework. | 
| Topeka,
                KS Shawnee Co. United States | NW 46th St. / Fielding Rd. (39.12928, -95.71420) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 49.1029 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2010 | ICD estimated from Google Maps linework. | 
| Shawnee,
                KS Johnson Co. United States | Woodsonia Dr. / Clear Creek Pkwy. (39.02142, -94.84924) | Roundabout Existing | All-Way Yield None | 2 Approaches 0 Driveways 32.4760 | Other (At-Grade) Single-Lane | 2004 | Date estimated. ICD estimated from Google Maps linework. | 
| Riverton,
                KS Cherokee Co. United States | US 69 Alt / K-66 / Beasley Rd. (37.07561, -94.71608) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 57.1730 | Other (At-Grade) Single-Lane | 2008 | Opened December 2008. Previously controlled by two-way stop ICD estimated from Google Maps linework. | 
| 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. | 
| De Pere,
                WI Brown Co. United States | Main Ave.-Wisconsin St. (STH 32) / Broadway (STH 57) (44.44744, -88.06049) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 48.5995 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2007 | Opened July 12, 2007. First multilane roundabout in Wisconsin. ICD estimated from Google Maps linework. | 
| Howard,
                WI Brown Co. United States | Lineville Rd. (CTH M) / Belmont Rd. (44.59075, -88.09447) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.5159 | Other (At-Grade) Single-Lane | 2006 | Completed summer 2006. Previously controlled by two-way stop ICD estimated from Google Maps linework. | 
| Howard,
                WI Brown Co. United States | Lineville Rd. (CTH M) / Velp Ave. (CTH HS) (44.59094, -88.07787) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.3200 | Other (At-Grade) Single-Lane | 2005 | Completed summer 2005. Fatal crash October 30, 2005. 11861-05. ICD estimated from Google Maps linework. | 
| Howard,
                WI Brown Co. United States | Lineville Rd. (CTH M) / Waterway Ct. (44.59112, -88.07314) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 28.9178 | Other (At-Grade) Single-Lane | 2007 | Completed summer 2007. ICD estimated from Google Maps linework. | 
| Milwaukee,
                WI Milwaukee Co. United States | W Canal St. / N 25th St. (43.03109, -87.94351) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 41.9057 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2005 | Opened September 15, 2005 ICD estimated from Google Maps linework. | 
| Madison,
                WI Dane Co. United States | Star Dr. / Apollo Way (43.08892, -89.27760) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 26.1663 | Other (At-Grade) Single-Lane | 2003 | Date estimated. ICD estimated from Google Maps linework. | 
| Madison,
                WI Dane Co. United States | Star Dr. / Dominion Dr. (43.09153, -89.27502) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 26.1652 | Other (At-Grade) Single-Lane | 2006 | Date estimated. ICD estimated from Google Maps linework. | 
| Madison,
                WI Dane Co. United States | McLean Dr. / Sharpsburg Dr. (43.08695, -89.27359) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 26.1672 | Other (At-Grade) Single-Lane | 2003 | Date estimated. ICD estimated from Google Maps linework. | 
| Provo,
                UT Utah Co. United States | E 900 S / Nevada Ave. / S 1350 E / S 1400 E (40.22206, -111.63470) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 26.4459 | Other (At-Grade) Single-Lane | 2005 | ICD estimated from Google Maps linework. | 
| Lehi,
                UT Utah Co. United States | N 900 W / W Grasslands Dr. (40.38620, -111.82260) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 31.8400 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2004 | In parking lot for big box retail shopping center. ICD estimated from Google Maps linework. | 
| St. George,
                UT Washington Co. United States | Washington Pkwy. / (unknown) (37.14462, -113.48590) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 60.9290 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2005 | Date estimated. ICD estimated from Google Maps linework. | 
| Champaign,
                IL Champaign Co. United States | English Oak Dr. / Chestnut Grove Dr. (40.09811, -88.32787) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 26.4942 | Other (At-Grade) Single-Lane | 2005 | ICD estimated from Google Maps linework. | 
| Champaign,
                IL Champaign Co. United States | Crabapple Ln. / Sandcherry Dr. (40.09553, -88.32968) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 1 Driveways 30.4800 | Other (At-Grade) Single-Lane | 2006 | |
| Dalton Gardens,
                ID Kootenai Co. United States | 4th St. / Hanley Ave. (47.72981, -116.77610) | Roundabout Existing | All-Way Yield Active Pedestrian Warning (flashing yellow) | 4 Approaches 0 Driveways 32.1335 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| Madison,
                WI Dane Co. United States | Lien Rd. / Zeier Rd. (43.12128, -89.29919) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 53.1768 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2010 | Opened October 2010. ICD estimated from Google Maps linework. | 
| Mosinee,
                WI Marathon Co. United States | Main St. / Old Highway 51 / Ranger St. (44.79026, -89.69181) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.7706 | Other (At-Grade) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| Billings,
                MT Yellowstone Co. United States | Shiloh Rd. / Grand Ave. (45.78407, -108.61760) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 39.1455 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Series of 8 roundabouts. Fatal crash 2012. 11861-05. Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| Billings,
                MT Yellowstone Co. United States | Shiloh Rd. / Broadwater Ave. (45.77685, -108.61760) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 44.9815 | 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. / 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. / 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. | |
| Santa Barbara,
                CA Santa Barbara Co. United States | Cabrillo Blvd. / Coast Village Rd. / Hot Springs Rd. (34.42272, -119.65268) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | |
| Billings,
                MT Yellowstone Co. United States | Hwy 3 / 27th St. / Airport Rd. (45.80209, -108.53540) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.7937 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Located at Billings airport. Functional Class: Principal Arterial ICD estimated from Google Maps linework. | 
| Redding,
                CA Shasta Co. United States | Shasta View Dr. / Inspiration Pl. (40.59578, -122.32500) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 39.9026 | Other (At-Grade) Single-Lane | 2009 | In a new school zone Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Corinth,
                MS Alcorn Co. United States | Harper Rd. / Droke Rd. (34.92347, -88.49539) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2010 | School 1000' west of roundabout. | 
| 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. | 
| 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. | 
| 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. | 
| 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. | 
| 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. | 
| 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. | 
| 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. | 
| San Diego,
                CA San Diego Co. United States | Bird Rock Ave. / Chelsea Ave. (32.81540, -117.27162) | Traffic Calming Circle Existing | All-Way Yield None | 4 Approaches 0 Driveways 13.7160 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Earth. | 
| 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. | 
| 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. | 
| Mecca,
                CA Riverside Co. United States | Hammond Rd. / 4th St. (33.57183, -116.07794) | Roundabout Existing | All-Way Yield At-grade Rail Crossing Signals/Gates (controlling approach only) | 3 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2013 | Double-track railroad with at-grade rail crossing on the southwest leg (4th Street) approximately 200 feet from the roundabout. A signalized intersection is located on the opposite side of the at-grade rail crossing approximately 230 feet from the rail crossing. Merging right-turn bypass lane on the southwest leg. | 
| 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. | 
| 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. | 
| 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. | 
| 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. | 
| 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. |