List of otoyol routes in Turkey

*Otoyol*
Otoyol
	; Route markers for three Turkish Motorways
	Otoyol network in Turkey as of February 2022. Motorways in use, under construction and projected.
System information
	Maintained by Karayolları Genel Müdürlüğü
Formed	1968
Highway names
Otoyols:	Otoyol XX (O-XX)
System links
	Highways in Turkey; Motorways List; ; State Highways List; ;

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 27 of the country's 81 provincial-level administrative divisions.

As of December 2023, there are 3,726 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	93	57.8	in Kuyucak, Aydın	in Denizli	2023
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-31	72	44.7	O-31in Aydın	in Kuyucak, Aydın	2024
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

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