# List of otoyol routes in Turkey

Otoyol routes in Turkey follow a regional based two-digit numbering system. All routes have the prefix O on all signage and maps. Motorways that start in the Marmara Region are all single digit. Motorways that start in The Central Anatolia Region have a first digit of two. Motorways starting in the Aegean Region have a first digit of three. Motorways starting in the Mediterranean Region and Southeastern Anatolia Region have a first digit of five. The O-21A is the only motorway to have a letter assigned to it. Most motorways in Turkey have six lanes (3+3 lanes), however there are sections of some motorways with only four (2+2) lanes. The motorways extended to 28 of the country's 81 provincial-level administrative divisions.
As of October 2024, there are 3,796 km of toll motorways network (otoyollar) in service.

## List of Otoyol routes

| Number | Length (km) | Length (mi) | Northern or western terminus | Southern or eastern terminus | Built | Notes |
| O-1 | 20.5 | 12.7 | in Osmaniye K.(K1) Bakırköy, Istanbul | Bağdat Avenue in Söğütlüçeşme K.(K15) Kadıköy, Istanbul | 1973 | Istanbul First Beltway |
| O-2 | 36.9 | 22.9 | O-3 in Mahmutbey doğu K.(K20), Istanbul | O-4 in Anadolu otoyolu K.(K10) Istanbul | 1988 | Istanbul second Beltway |
| O-3 | 246.9 | 153.4 | Edirne Batı K.(K1) near Edirne | O-2 Mahmutbey Doğu K.(K20) in Bağcılar, Istanbul | 1987 | |
| O-4 | 372 | 231.2 | O-2 Anadolu Otoyolu K10 junction in Ümraniye- Ataşehir, Istanbul | O-20 near Sincan, Ankara | 1984 | |
| O-5 | 409.4 | 254.4 | O-4 Muallim köy K7-1 junction in Gebze, Kocaeli | O-30 in Bornova, İzmir | 2016 till 2019 | Section from Bursa North to Gebze including Osman Gazi Bridge opened in 2016. |
| O-6 | 101 | 62.8 | near Malkara, Tekirdağ | near Lapseki, Çanakkale | 2022 | Section from Malkara to Lapseki including 1915 Çanakkale Bridge, the longest suspension bridge in the world, opened in 2022. |
| O-7 | 275.2 | 171.1 | O-3 near Kınalı,Silivri Istanbul | O-4 near Akyazı, Sakarya | 2016 till 2020 | Yavuz Sultan Selim Bridge istanbul Third Beltway |
| O-20 | 110 | 68.4 | Road forms complete ring around Ankara | Road forms complete ring around Ankara | 1987 | Ankara beltway |
| O-21 | 399.5 | 248.3 | O-20 near Gölbaşı, Ankara | near Tarsus, Mersin | 1984 till 2020 | |
| O-21A | 32 | 19.9 | near Çakmak Bucağı, Konya | O-21 near Eminlik, Niğde | 1992 | |
| O-22 | 34.1 | 21.2 | O-5 near Çağlayan, Bursa | near Turanköy, Bursa | 2006 | |
| O-30 | 60.4 | 37.5 | O-33 in Menemen, İzmir | O-32 in Balçova, İzmir | 1993 till 2006 | Izmir Beltway |
| O-31 | 127.8 | 79.4 | O-30 in Buca, İzmir | in Aydın | 1996 till 2004 | |
| O-31 | 165 | 102.5 | in Aydın | in Denizli | 2023 till 2024 | |
| O-32 | 77.7 | 48.3 | in Çeşme, İzmir | O-30 in Balçova, İzmir | 1992 till 1996 | |
| O-33 | 76 | 47 | Port of Çandarlı near Çandarlı, İzmir | O-30 in Menemen, İzmir | 2019 | |
| O-51 | 99.2 | 61.6 | in Çeşmeli, Mersin | O-52 in Adana | 1992 | |
| O-52 | 365 | 226.8 | O-51 in Adana | near Şanlıurfa | 1992 | |
| O-53 | 150 | 93.2 | O-52 near Ceyhan | in İskenderun | 1993 | |
| O-54 | 35 | 21.7 | in Gaziantep | O-52 in Gaziantep | 2013 | Gaziantep Beltway |

## Projects
### Under Construction

| Number | Length (km) | Length (mi) | Northern or western terminus | Southern or eastern terminus | Opens | Notes |
| O-7 | 45 | 28 | O-7 near Nakkaş, Istanbul | O-7 near Başakşehir, Istanbul | 2026 | |
| O-51 | 52 | 32.3 | in Kızkalesi, Mersin | O-51 near Çeşmeli, Mersin | 2026 | |
| O-20 | 120 | 74.6 | O-20 in Mamak, Ankara | in Delice, Kırıkkale | 2026 | Part of Ankara-Samsun Motorway. Delice-Samsun section still in planning phase. |
| O-51 | 122 | 75.8 | in Antalya | in Alanya | 2027 | Part of Afyon–Antalya–Alanya Motorway. Afyonkarahisar-Burdur-Antalya section still in planning phase. |
| O-6 | 127 | 78.9 | near Malkara, Tekirdağ | O-3 near Kınalı, Istanbul | 2027 | Part of Kınalı-Balıkesir Motorway. |
| O-53 | 19.2 | 11.9 | O-53 near İskenderun, Hatay | near Antakya, Hatay | 2028 | İskenderun-Antakya Motorway |

### Tender Phase

| Number | Length (km) | Length (mi) | Northern or western terminus | Southern or eastern terminus | Tender Date | Notes |
| | 130 | 80.8 | O-22 in Sivrihisar, Eskişehir | O-20 in Tulumtaş, Ankara | | Part of Izmir–Ankara Motorway. İzmir-Sivrihisar section still in planning phase. |
| O-52 | 454 | 282.1 | O-52 near Şanlıurfa | near Habur, Silopi, Şırnak | | Şanlıurfa-Mardin-Habur Motorway (including link to Diyarbakır) (border crossing) |

### Planning Phase

| Number | Length (km) | Length (mi) | Northern or western terminus | Southern or eastern terminus | Tender Date | Notes |
| O-51 | 30 | 18.1 | in Taşucu | in Kızkalesi | N/A | |
| | 12 | 7.46 | O-30 near Sasalı, İzmir | O-30 near İnciraltı, İzmir | N/A | İZKARAY [tr] - Gulf of İzmir Passage Project between Çiğli (Sasalı) and Balçova (İnciraltı); including one undersea tunnel and one bridge |
| | 41 | 25.5 | O-33 near Menemen, İzmir | O-30 near Buca, İzmir | N/A | İzmir 2. peripheral motorway |
| O-31 | 155 | 96.3 | O-31 in Denizli | near Bucak, Burdur | N/A | Denizli-Burdur section of Aydın-Denizli-Burdur Motorway |
| O-6 | 137 | 85.1 | near Lapseki, Çanakkale | O-5 near Balıkesir | N/A | Lapseki-Balıkesir section of Kınalı-Balıkesir Motorway |
| | 350 | 217.5 | } near Afyonkarahisar | near Antalya | N/A | Afyonkarahisar-Burdur-Antalya Motorway [tr] |
| | 408 | 253.5 | O-5 near Turgutlu, Manisa | O-22 near Sivrihisar | N/A | Sivrihisar-İzmir section of Ankara-İzmir Motorway |
| O-22 | 231 | 143.5 | O-5 near Kestel, Bursa | O-22 near Sivrihisar, Eskişehir | N/A | Sivrihisar-Bursa Motorway |
| | 303 | 188.3 | near Samsun | near Delice, Kırıkkale | N/A | Delice-Samsun section of Ankara-Samsun Motorway |
| | 144 | 89.5 | near Bafra, Samsun | near Ünye, Ordu | N/A | Bafra-Samsun-Ünye Motorway |
| | 137 | 85.2 | O-4 in Gerede, Bolu | in Ilgaz, Çankırı | N/A | Part of Gerede-Gürbulak Motorway [tr]. Ilgaz-Merzifon-Koyulhisar-Pülümür-Horasan-Gürbulak sections still in planning phase. |
| | 183 | 113.7 | near Ilgaz, Çankırı | near Merzifon, Amasya | N/A | Ilgaz-Merzifon Motorway [tr] |
| | 919 | 571 | near Merzifon, Amasya | near Gürbulak, Doğubayazıt, Ağrı | N/A | Merzifon-Gürbulak Motorway [tr] (border crossing) |
| | 91 | 56.6 | O-5 near Yalova | O-4 near İzmit, Kocaeli | N/A | Yalova-İzmit Motorway [tr] |
| | 440 | 273.4 | near Afyonkarahisar | near Ulukışla, Niğde | N/A | Afyonkarahisar-Konya-Ereğli-Niğde (Ulukışla) Motorway |
| | 105 | 65.3 | near Bozüyük, Bilecik | near Afyonkarahisar | N/A | Bozüyük-Afyonkarahisar Motorway |
| O-51 | 200 | 124.3 | near Alanya, Antalya | near Silifke, Mersin | N/A | Alanya-Silifke Motorway |
| | 105 | 65.3 | O-4 near Düzce | near Zonguldak | N/A | Düzce-Zonguldak Motorway |
| | 500 | 310.7 | near Delice, Kırıkkale | near Refahiye, Erzincan | N/A | Delice-Sivas-Refahiye Motorway |
| | 600 | 372.8 | O-21 near Nevşehir | near Diyarbakır | N/A | Nevşehir-Kayseri-Malatya-Diyarbakır Motorway |
| | 220 | 136.7 | near Sivas | near Malatya | N/A | Sivas-Malatya Motorway |
| | 50 | 31.1 | O-52 near Şanlıurfa | near Akçakale, Şanlıurfa | N/A | Şanlıurfa-Akçakale Motorway (border crossing) |
| | 475 | 295.2 | near Diyarbakır | near Gürbulak, Doğubayazıt, Ağrı | N/A | Diyarbakır-Gürbulak Motorway (border crossing) |
| | 540 | 335.6 | near Trabzon | near Kahramanmaraş | N/A | Trabzon-Refahiye-Malatya-Kahramanmaraş Motorway |
| | 250 | 155.4 | near Pasinler, Erzurum | near Türkgözü, Posof, Ardahan | N/A | Pasinler-Türkgözü Motorway (border crossing) |
| | 460 | 285.8 | near Rize | near Diyarbakır | N/A | Rize-Erzurum-Diyarbakır Motorway |
| O-33 | 80 | 49.7 | O-33 near Çandarlı, Dikili, İzmir | O-5 near Savaştepe, Balıkesir | N/A | Çandarlı-Bergama-Savaştepe Motorway |
| | 90 | 55.9 | O-31 near Aydın | near Muğla | N/A | Aydın-Muğla Motorway |
| | 75 | 46.6 | near İpsala, Edirne | near Malkara, Tekirdağ | N/A | Malkara-İpsala Motorway (border crossing) |
| | 130 | 80.8 | O-3 near Havsa, Edirne | near Kavakköy, Gelibolu, Çanakkale | N/A | Havsa-Gelibolu Motorway |
| | 180 | 111.9 | near Lapseki, Çanakkale | O-5 near Karacabey, Bursa | N/A | Lapseki-Karacabey Motorway |