| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| Orebro,
                Orebro County Orebro Sweden | Glomman / Lundgårdsvägen / Elof Ljunggrens väg (59.24312, 15.19711) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 23.2095 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Orebro,
                Orebro County Orebro Sweden | Södermalmsplan / Södermalmsallén / Gustafviksvägen (59.26384, 15.19773) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 39.6763 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Orebro,
                Orebro County Orebro Sweden | Kungsgatan / Fabriksgatan (59.26546, 15.20042) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 37.2329 | Other (At-Grade) Single-Lane | Passage for OSOW through central island? ICD estimated from Google Maps linework. | |
| Orebro,
                Orebro County Orebro Sweden | Hedgatan / Boglundsgatan (59.29757, 15.20183) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 37.1978 | Other (At-Grade) Multilane (2 Lane, unspecified) | ICD estimated from Google Maps linework. | |
| Orebro,
                Orebro County Orebro Sweden | Rte 571 / Rte 691 (59.24286, 15.05190) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 36.6468 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Orebro,
                Orebro County Orebro Sweden | Södra Grev Rosengatan / Alnängsgatan / CV-gatan (59.27727, 15.22293) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 39.6606 | Other (At-Grade) Multilane (2 Lane, unspecified) | At-grade rail crossing on north leg. ICD estimated from Google Maps linework. | |
| Orebro,
                Orebro County Orebro Sweden | Södra Grev Rosengatan / Norra Grev Rosengatan (59.27699, 15.22495) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 23.7966 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Orebro,
                Orebro County Orebro Sweden | Rte 50 / E18-E20 WB Ramps / Karosserigatan (59.29683, 15.22832) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 43.2967 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | ICD estimated from Google Maps linework. | |
| Orebro,
                Orebro County Orebro Sweden | CV-rondellen (CV-gatan / Grenadjärgatan) (59.27981, 15.23082) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 26.8452 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Orebro,
                Orebro County Orebro Sweden | Sörbyängsvägen / Norrköpingsvägen (59.25292, 15.23597) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 50.0692 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Orebro,
                Orebro County Orebro Sweden | Hjortstorpsvägen / Grenadjärgatan (59.28677, 15.23873) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 36.5996 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Orebro,
                Orebro County Orebro Sweden | Universitetsallén / Hagmarksgatan / Ormestagatan (59.26524, 15.24082) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 20.7529 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Orebro,
                Orebro County Orebro Sweden | Universitetsgatan / Åstadalsvägen / Forskarvägen / Rudbecksgatan (59.25460, 15.24190) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 45.7927 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Orebro,
                Orebro County Orebro Sweden | Rte 207 / Ormestagatan (59.26171, 15.26096) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 29.3012 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Orebro,
                Orebro County Orebro Sweden | Karlskogavagen / E20 NB Ramps (59.23932, 15.14725) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 29.9313 | Freeway Ramps (Grade-Separated) Single-Lane | ICD estimated from Google Maps linework. | |
| Orchidlands Estates,
                HI Hawaii Co. United States | Keaau-Pahoa Rd. / Ainaloa Blvd. (19.54338, -154.97495) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 29.1084 | Other (At-Grade) Single-Lane | 2020 | R/W being hard to acquire, this project is being rushed within existing R/W as an urgent safety measure. https://histategis.maps.arcgis.com/apps/MapSeries/index.html?appid=39e4d804242740a89d3fd0bc76d8d7de | 
| Orbost,
                Victoria East Gippsland Australia | Salisbury St. / Nicholson St. (-37.70448, 148.45554) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Orbe,
                Vaud Jura-Nord vaudois District Switzerland | Avenue de Thienne / Route de Valeyres / Route de Montcherand (46.73032, 6.53134) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 1 Driveways | Other (At-Grade) Single-Lane | ||
| Orbe,
                Vaud Jura-Nord vaudois District Switzerland | Route de Valeyres / Chemin de Suchet / Chemin de Montchoisi (46.73467, 6.53041) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Orbe,
                Vaud Jura-Nord vaudois District Switzerland | Avenue de Thienne / Avenue Carrard-et-de Foligny / Rue des Terreaux / Grand Rue (46.72645, 6.53206) | Roundabout Existing | All-Way Yield Unknown | 5 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Orbe,
                Vaud Jura-Nord vaudois District Switzerland | Rue de Grand-Pont / Route de Saint-Eloi / Route d'Arnex / Chemin de Philosophes (46.72097, 6.53071) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Oranjestad, Aruba | Rte 4A-4B / Pitastraat (12.54582, -70.03982) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Oranjestad, Aruba | Rte 1A-1B (Avenida Nelson O Oduber) / Rte 4A-4B (12.54551, -70.05318) | Rotary Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, 2x2 max) | ||
| Oranjestad, Aruba | Rte 1A-1B / Caya Imelda Catharina Eckmeyer-Bermudez (12.55317, -70.05115) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, 2x1 max) | Turbo roundabout. | |
| Oranjestad, Aruba | Rte 1A-1B / Palm Beach (12.56892, -70.04274) | Rotary Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, 2x2 max) | ||
| Oranjestad, Aruba | Rte 1A-1B (De La Sallestraat) / Rte 3A-3B (Seroe Blanco) / Caya Ing Roland H Lacle (12.52324, -70.02756) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Oranjestad, Aruba | Rte 1A-1B (L G Smith Blvd.) / Belgiëstraat (12.52656, -70.04779) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, 2x1 max) | ||
| Oranjestad, Aruba | Belgiëstraat / Arendstraat (12.52787, -70.04640) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 1 Driveways | Other (At-Grade) Single-Lane | ||
| Oranjestad, Aruba | 1A (Avenida Nelson O Oduber) / 8B (Avenida Edgar J Watty Vos) / 1A-1B (L G Smith Blvd.) / J E Irausquin Blvd. (12.53233, -70.05375) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, 2x2 max) | Turbo roundabout. | |
| Oranjestad, Aruba | Rte 8A-8B / Rte 2A-2B (12.53743, -70.03101) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, 2x1 max) | Turbo roundabout. | |
| Oranjestad, Aruba | Rte 2A-2B / Santa Helenastraat / Hubadastraat (12.52958, -70.03287) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Oranjestad, Aruba | Rte 1A-1B / L G Smith Blvd. / Stadionweg (12.50879, -70.02737) | Roundabout Existing | All-Way Yield Unknown | 5 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, 2x1 max) | ||
| Orange Township,
                OH Delaware Co. United States | E Powell Rd. / Lyra Dr. / Mesloh Dr. (40.15631, -82.97132) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2022 | https://www.delgazette.com/news/98988/roundabout-completed-in-orange | 
| Orange County Great Park,
                CA Orange Co. United States | Ridge Valley / Pavillion Park (33.69527, -117.72962) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 54.6525 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2013 | ICD estimated from Google Maps linework. | 
| Orange City,
                IA Sioux Co. United States | SR 10 (8th St. SE) / Jay Ave. (42.99743, -96.03708) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2023 | https://www.youtube.com/watch?v=ZFEW-ApSdqQ | 
| Orange Beach,
                AL Baldwin Co. United States | Canal Rd. / (parking) (30.29209, -87.57667) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 45.7200 | Other (At-Grade) Single-Lane | 2023 | https://www.youtube.com/watch?v=OxgEB2iOzH4 | 
| Orange,
                CA Orange Co. United States | Designer Dr. / City Blvd. E (33.78117, -117.89081) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 28.7879 | Other (At-Grade) Single-Lane | 2012 | Year Completed estimated (2011-2013). ICD estimated from Google Maps linework. | 
| Orange,
                New South Wales Orange Australia | Peisley St. / Kite St. (-33.28618, 149.10321) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Orange,
                New South Wales Orange Australia | A32 (Summer St. - Woodward St.) / Woodward St. / Coronation Dr. (-33.28159, 149.08656) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Orange,
                New South Wales Orange Australia | A32 (Molong Rd. - Mitchell Hwy.) / Northern Distributor Rd. (-33.26083, 149.07636) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Orange,
                New South Wales Orange Australia | Northern Distributor Rd. / Burrendong Way (-33.25823, 149.08478) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Orange,
                New South Wales Orange Australia | Northern Distributor Rd. / Leeds Parade / Hanrahan Pl. (-33.25935, 149.11315) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Orange,
                New South Wales Orange Australia | Northern Distributor Rd. / Ophir Rd. (-33.27843, 149.12938) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Orange,
                New South Wales Orange Australia | A32 (Summer St.) / Hill St. (-33.28271, 149.09380) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Orange,
                New South Wales Orange Australia | Dalton St. / William St. / Leeds Parade (-33.27710, 149.10711) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Orange,
                New South Wales Orange Australia | Hill St. / Dalton St. (-33.27536, 149.09538) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Orange,
                New South Wales Orange Australia | Byng St. / William St. (-33.28238, 149.10604) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Orange,
                New South Wales Orange Australia | Byng St. / Hill St. (-33.28062, 149.09423) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | Left-turn-only lanes on all legs. | |
| Orange,
                New South Wales Orange Australia | Byng St. / Anson St. (-33.28135, 149.09913) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Orange,
                New South Wales Orange Australia | Anson St. / March St. (-33.27933, 149.09956) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | Left-turn-only lanes on all legs. | |
| Orange,
                New South Wales Orange Australia | McLachlan St. / Dalton St. (-33.27745, 149.10953) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | Left-turn-only lanes on all legs. | |
| Orange,
                New South Wales Orange Australia | Anson St. / Heatherbrae Parade (-33.26115, 149.10547) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Orange,
                New South Wales Orange Australia | Anson St. / Moulder St. (-33.28755, 149.09789) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | Left-turn-only lanes on all legs. | |
| Orange,
                New South Wales Orange Australia | Anson St. / Kite St. (-33.28550, 149.09832) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | Left-turn-only lanes on all legs. | |
| Orange,
                New South Wales Orange Australia | Hill St. / Kite St. (-33.28477, 149.09338) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | Left-turn-only lanes on all legs. | |
| Orange,
                CA Orange Co. United States | Riverbend Pkwy. / Shadyvale St. (33.83915, -117.85510) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 31.7445 | Other (At-Grade) Single-Lane | 2008 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Orange,
                CA Orange Co. United States | Chapman Ave. / Glassell St. (33.78788, -117.85310) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 70.4752 | Other (At-Grade) Single-Lane | Old school traffic circle, pedestrian park in the middle, cars park along the sides. ICD estimated from Google Maps linework. | |
| Oran Park,
                New South Wales Camden Australia | Central Ave. / Shannon Way (-34.00268, 150.74265) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Oran Park,
                New South Wales Camden Australia | Redman Grange  / Shannon Way (-34.00339, 150.74506) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Oran Park,
                New South Wales Camden Australia | Dan Cleary Dr. / Harvey St. / Dalton Terrace (-34.01404, 150.73654) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Oran Park,
                New South Wales Camden Australia | Skaife St. / Harvey St. (-34.01082, 150.73614) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Oran Park,
                New South Wales Camden Australia | Dick Johnson Dr. / Steward Dr. (-33.99599, 150.72871) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Oran Park,
                New South Wales Camden Australia | Skaife St. / The Straight (-34.00849, 150.73157) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Oran Park,
                New South Wales Camden Australia | South Circuit / The Straight (-34.00658, 150.73575) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Oradea,
                Bihor Romania | E79 (Bulevardul Dacia) / Strada Transilvaniei (47.07352, 21.91448) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Or Akiva,
                Haifa District Israel | Sderot Yerushalayim / Ibn Gabirol (32.51613, 34.91753) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Or Akiva,
                Haifa District Israel | Sderot Yerushalayim / Har HaTsotim (32.51949, 34.91551) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Or Akiva,
                Haifa District Israel | Shidlovski Ave. / Rte 2 NB Ramps (32.50503, 34.91487) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | ||
| Or Akiva,
                Haifa District Israel | Rte 6511 (Sderot HaNassi Weizmann) / Sdeort David HaMelech (32.50275, 34.92126) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | Yield-controlled right-turn bypass lane on south leg. | |
| Or Akiva,
                Haifa District Israel | David Elazar St. / Haim HaZaz St. (32.51331, 34.91576) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Or Akiva,
                Haifa District Israel | Ha-Zayit St. / Hailan St. (32.51651, 34.92233) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | Right-turn bypass lanes on all four legs. | |
| Oppdal,
                Trøndelag Oppdal Norway | E6 (Trondheimsvegen - Dovrevegen) / E70 (Sunndalsvegen) / O Skasliens veg (62.59372, 9.69241) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Oppdal,
                Trøndelag Oppdal Norway | E70 (Sunndalsvegen) / Inge Krokanns Veg / Aunevegen (62.59517, 9.68962) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Oppdal,
                Trøndelag Oppdal Norway | E6 (Dovrevegen) / Ola Setroms veg / Turistvegen (62.59169, 9.68743) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Opotiki,
                Bay of Plenty Opotiki New Zealand | SH 35 (Saint John St. - Elliott St.) / Saint John St. / Elliott St. (-38.00422, 177.28711) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Opotiki,
                Bay of Plenty Opotiki New Zealand | Church St. / Elliott St. (-38.00422, 177.28454) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Opole,
                Opolskie Opole Poland | Stanisława Spychalskiego / Krapkowicka (50.66699, 17.90679) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-lane w/ Traversable Central Island | ||
| Opole,
                Opolskie Opole Poland | DK46 (Powstańców Warszawskich) / DW459 (Partyzancka) (50.69618, 17.87784) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Opole,
                Opolskie Opole Poland | DW454 / DK45-DK46 EB Ramps (50.70099, 17.90399) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Freeway Ramps (Grade-Separated) Single-Lane | Through bypass lane on north leg. | |
| Opole,
                Opolskie Opole Poland | DW454 / DK45-DK46 WB Ramps / Jana Sobieskiego / Obwodnica Czarnowąsów (50.70409, 17.90204) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Freeway Ramps (Grade-Separated) Single-Lane | ||
| Opole,
                Opolskie Opole Poland | Kazimierza Pużaka / Wiejska / Aleja Solidarności / Batalionu Parasol / (parking) (50.67446, 17.96106) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Opole,
                Opolskie Opole Poland | Rondo Ronalda Regana [Kazimierza Sosnkowskiego / Wiejska] (50.67324, 17.96112) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Single-Lane | Add-lane bypass lanes on all legs. | |
| Opole,
                Opolskie Opole Poland | Aleja Solidarności / Koszalińska (50.67474, 17.96434) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Opole,
                Opolskie Opole Poland | Rondo Jerzego Szczakiela [DK94 (Strzelecka - Szlak Cysterski) / Strzelecka] (50.64116, 17.99532) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways | Other (At-Grade) Single-Lane | ||
| Opelika,
                AL Lee Co. United States | Gateway Dr. / Society Hill Rd. / Lee Rd. 54 (32.61095, -85.39177) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2020 | |
| Opelika,
                AL Lee Co. United States | W Point Pkwy. / Anderson Rd. / SportsPlex Pkwy. (32.67426, -85.33410) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2022 | |
| Opelika,
                AL Lee Co. United States | (unknown) / (parking) (32.66880, -85.36252) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 50.2920 | Other (At-Grade) Single-Lane | 2013 | Year Completed estimated (2012-2015). | 
| Opelika,
                AL Lee Co. United States | Cedar Creek Dr. / Heatherbrook Dr. (32.69321, -85.38535) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Opelika,
                AL Lee Co. United States | Robert Trent Jones Trl. / Lake Lodge Blvd. (32.68527, -85.42803) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 53.3400 | Other (At-Grade) Single-Lane | 2008 | Year Completed estimated (2006-2011). | 
| Opelika,
                AL Lee Co. United States | Interstate Dr. / Enterprise Dr. / Hamilton Rd. (32.61583, -85.40719) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.1916 | Other (At-Grade) Single-Lane | 2018 | https://www.opelika-al.gov/CivicAlerts.aspx?AID=74&ARC=201 ICD estimated from Google Maps linework. | 
| Opelika,
                AL Lee Co. United States | Auburn St. / ML King Blvd. / Frederick Rd. (32.63642, -85.38391) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 34.1957 | Other (At-Grade) Single-Lane | 2018 | https://www.opelika-al.gov/CivicAlerts.aspx?AID=10 ICD estimated from Google Maps linework. | 
| Opava,
                Moravia-Silesia Opava Czechia | II/461 / II/464 / Mezi Brahy (49.91298, 17.91868) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Opava,
                Moravia-Silesia Opava Czechia | I/57 / II/461 (49.91404, 17.89392) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Opava,
                Moravia-Silesia Opava Czechia | I/11 (U dráhy) / Pekařská (49.95517, 17.90482) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-Lane | ||
| Oostvoorne,
                South Holland Westvoorne Netherlands | N218 (Kleidijk) / Brielseweg (51.91427, 4.11626) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | Turbo roundabout. | |
| Ooralea,
                Queensland Mackay Australia | Boundary Rd. / Canecutters Dr. / Makybe Diva Dr. (-21.17399, 149.15021) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Ooltewah,
                TN Hamilton Co. United States | Ooltewah Ringgold Rd. / Standifer Gap Rd. (35.01406, -85.08993) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 25.4324 | Other (At-Grade) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| Ooltewah,
                TN Hamilton Co. United States | Ooltewah Georgetown Rd. / Mountain View Rd. / Blanche Rd. (35.11841, -85.04682) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 46.8921 | Other (At-Grade) Unknown | 2018 | ICD estimated from Google Maps linework. | 
| Ongar,
                England Essex United Kingdom | A414 (Epping Rd.) / A128 (High St.) / B184 (Fyfield Rd.) (51.71264, 0.24499) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Onekawa,
                Hawke’s Bay Napier New Zealand | Prebensen Dr. / Severn St. / Ford Rd. (-39.49625, 176.88558) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Multilane (2 Lane, unspecified) |