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 .[ 2]
As of October 2024, there are 3,796 km of toll motorways network (otoyollar ) in service.[ 2]
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 Eyüpsultan , Istanbul
Bağdat Avenue in Kadıköy , Istanbul
1973
Istanbul Inner Beltway
O-2
36.9
22.9
O-3 in Mahmutbey, Istanbul
in Kozyatağı , Istanbul
1988
Istanbul Outer Beltway
O-3
246.9
153.4
near Edirne
in Eyüpsultan , Istanbul
1987
O-4
372
231.2
O-2 /O1-O2 connector in Ataşehir , Istanbul
O-20 near Sincan, Ankara
1984
O-5
409.4
254.4
O-4 near 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, Istanbul
O-4 near Akyazı , Sakarya
2016 till 2020
Yavuz Sultan Selim Bridge opened in 2016.
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-6
114
70.8
near Malkara , Tekirdağ
O-3 near Kınalı, Istanbul
Part of Kınalı-Balıkesir Motorway .
O-7
45
28
O-7 near Nakkaş, Istanbul
O-7 near Başakşehir , Istanbul
2025
O-51
41
25.8
in Kızkalesi , Mersin
O-51 near Çeşmeli , Mersin
2025
O-51
155
96.3
in Antalya
in Alanya
Part of Afyon–Antalya–Alanya Motorway . Afyonkarahisar-Burdur-Antalya section still in planning phase.
O-53
78
48.5
O-53 near İskenderun , Hatay
near Cilvegözü , Reyhanlı , Hatay
İskenderun-Cilvegözü Motorway (border crossing)
31.3
19.5
O-53 near Dörtyol , Hatay
near Hassa , Hatay
Dörtyol-Hassa Motorway
119
73.9
O-20 in Mamak , Ankara
in Delice , Kırıkkale
Part of Ankara-Samsun Motorway . Delice-Samsun section still in planning phase.
Tender Phase
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
See also
External links
References