Otoyol Devlet yolu İl yolu | |
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![]() ![]() ![]() ![]() Route markers | |
![]() Otoyol network in Turkey as of February 2022. Motorways in use, under construction and projected. | |
System information | |
Maintained by Karayolları Genel Müdürlüğü | |
Formed | 1950, 1968 [1] |
Highway names | |
Otoyols: | Otoyol XX (O-XX) |
System links | |
The highways in Turkey are divided into three types: motorways, state roads and provincial roads.
There are three types of intercity roads in Turkey:
Motorways are controlled-access highways that are officially named Otoyol . But it isn't uncommon that people in Turkey call them Otoban (referring to Autobahn) as this types of roads entered popular culture by the means of Turks in Germany. They also depend on the General Directorate of Highways except those that are financed with a BOT model.
State roads ( Devlet Yolları ) are historical and free road network called State roads that are completely under the responsibility of the General Directorate of Highways except for urban sections (like the sections falling within the inner part of ring roads of Ankara, Istanbul or İzmir). Even if they mostly possess dual carriageways and interchanges, they also have some traffic lights and intersections.
Provincial roads (Il Yolları) are highways of secondary importance linking districts within a province to each other, the provincial center, the districts in the neighboring provinces, the state roads, railway stations, seaports, and airports.
As of 2023, there are 471 tunnels (total length 665 km) [4] and 9.660 bridges (total length 739 km) [5] on the network.
The numbering of state roads is as indicated below:
Provincial roads (İl yolu) in Turkey are maintained by the KGM. These roads serve as secondary roads to the State Roads (D.XXX) and mainly connect small towns (every district's capital town is accessible either by a state or a provincial road) or acting as alternate routes to the trunk roads.
A provincial road is governed under the responsibility of the respective Turkish provincial government, and bears the license plate number of that province in the road identification number's first half. (Example 35-04 List of provincial roads in Izmir Province)
Transport in Turkey is road-dominated and mostly fuelled by diesel. Transport consumes a quarter of energy in Turkey, and is a major source of air pollution in Turkey and greenhouse gas emissions by Turkey. The World Health Organization has called for more active transport such as cycling.
Asian Highway 1 (AH1) is the longest east-west route of the Asian Highway Network, running 20,557 km (12,774 mi) from Tokyo, Japan via Korea, China, Southeast Asia, Bangladesh, India, Pakistan, and Iran to the border between Turkey and Bulgaria west of Istanbul where it joins end-on with European route E80, running all the way to Lisbon, Portugal.
Otoyol 31, named the İzmir-Aydın Motorway or just the Aydın Motorway and abbreviated as the O-31 is a 127.8 km (79.4 mi) long toll motorway in western Turkey. Beginning at an intersection with İzmir Beltway, the O-31 runs south from İzmir to Aydın and parallels the D550 for most of its route.
Otoyol 4, named Anatolian Motorway and abbreviated as O-4, is a toll motorway connecting the northwestern Marmara Region to the Central Anatolia Region in Turkey. It runs parallel to the D.100 for more than half of its length and then parallels the D750 for most of the eastern half. The O-4 is a major expressway in Turkey as it connects eastern Istanbul and the heavily urbanized northeastern shore of the Sea of Marmara to the nation's capital, Ankara. The O-4 also makes up part of the International E-road network E80 and E89 as well as the AH-1 of the Asian Highway Network.
The General Directorate Of Highways (KGM) is a state agency in charge of the construction and maintenance of all public roadways outside of cities and towns in Turkey. It was established on 1 March 1950, following the acceptance of the International Highways Act in 1949. The agency is a sub unit of the Ministry of Transport and Infrastructure.
Otoyol 33, O-33 or North Aegean Motorway and abbreviated as the O-33 is a 55.2 km (34.3 mi) long toll motorway in western Turkey.Beginning at an intersection with İzmir Beltway, the O-33 runs north from Çiğli to Bergama and parallels the D550 for most of its route.
İzmir is a transportation hub for western Anatolia. İzmir has an extensive bus system, a developing metro, commuter rail system and a large urban ferry network. The city has highways connecting it to Çeşme, Menemen, Istanbul, Bursa and Aydın as well as a beltway. Mass transportation is operated by four separate public agencies all owned by the İzmir Municipality.
D.300 is a major east–west state road spanning 2,004 km (1,245 mi) through central Turkey. The route begins in Çeşme, Izmir and runs east to Kapıköy, Van, on the Turkey-Iran border. The route connects several provincial capitals, including Izmir, Uşak, Afyon, Konya, Aksaray, Kayseri, Malatya, Elazığ, Muş and Van. The route is the second longest state highway in Turkey, after the D.400.
Asian Highway 87 (AH87) is a road in the Asian Highway Network running 606 km from Ankara to Izmir, Turkey. The route is as follows:
Bayraklı Tunnels, formerly Karşıyaka Tunnels, are two motorway tunnels in series located on the İzmir's northern beltway, motorway O-30 E87, in Bayraklı district between Karşıyaka and Bornova of Izmir Province, western Turkey.
The Aslanlı Tunnel, is a motorway tunnel constructed on the Adana–Şanlıurfa motorway O-52 E90 AH84 in Gaziantep Province, southern Turkey.
Otoyol 22, abbreviated as O-22 and also known as Bursa–Sivrihisar Otoyolu, is a partly completed motorway in Turkey that will connect Bursa and Ankara in the future. The motorway starts at the Çağlayan intersection (O-5) and currently ends near Yenişehir at the State road D200.
The Ayran Tunnel, is a motorway tunnel constructed on the Adana–Şanlıurfa motorway O-52 E90 AH84 in Osmaniye Province, southern Turkey.
The Çakıt Tunnel, is a motorway tunnel constructed on the Ankara–Tarsus motorway O-21 E90 in Adana Province, southern Turkey.
The Taşoluk Tunnel, is a motorway tunnel constructed on the Adana–Şanlıurfa motorway O-52 E90 AH84 in Osmaniye Province, southern Turkey.
The İğdir Tunnel, is a motorway tunnel constructed on the Bursa–Sivrihisar motorway O-22 E90 in Bursa Province, northwestern Turkey. It was opened to the traffic in 2005.
The Otoyol is the national network of controlled-access highways in Turkey. The term Otoyol translates to motorway while the literal meaning is auto-route. The Otoyol was first opened in 1973.
The State Highways of the Republic of Turkey, abbreviated as T.C.K. are an integrated network of highways and roads in Turkey, consisting of a numbered grid spanning across the country. They are more commonly called State roads and are the primary road network in Turkey. The network is mostly maintained by the General Directorate of Highways (KGM), except for within large cities where the respective city municipality assumes responsibility.