The State Highways of the Republic of Turkey ( tr, Türkiye Cumhuriyeti Devlet Karayolları), abbreviated as T.C.K. are an integrated network of

highways A highway is any public or private road or other public way on land. It is used for major roads, but also includes other public roads and public tracks. In some areas of the United States, it is used as an equivalent term to controlled-access ...

and

roads A road is a linear way for the conveyance of traffic that mostly has an improved surface for use by vehicles (motorized and non-motorized) and pedestrians. Unlike streets, the main function of roads is transportation. There are many types of ...

Turkey Turkey ( tr, Türkiye ), officially the Republic of Türkiye ( tr, Türkiye Cumhuriyeti, links=no ), is a list of transcontinental countries, transcontinental country located mainly on the Anatolia, Anatolian Peninsula in Western Asia, with ...

, consisting of a numbered grid spanning across the country. They are more commonly called State roads ( tr, Devlet yolu) 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 ( tr, Büyükşehir) where the respective city municipality assumes responsibility. In the early 21st century, the network was greatly expanded to accommodate four-lane highways throughout the country. As of 2021, of the total system are four-lane highways.Network Statistics
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System Overview

Unlike

motorways in Turkey A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms i ...

, state highways do not have a minimum design standard. Despite the majority of the system consisting of four-lane, dual highways, other routes can be two-lane highways or even dirt roads, in mountainous areas. Some routes, especially within major cities, have been upgraded to

controlled access highway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms i ...

standards; while other routes, such as the D.650, between

Arifiye Arifiye is a district center of Sakarya Province, Turkey. It is also included in Greater Sakarya Proper. Geography Arifiye is situated at just at the east of Lake Sapanca. It is almost merged to Adapazarı the center of the province and it ...

and

Bozüyük Bozüyük is a town and district of Bilecik Province in the Marmara region of Turkey. Features Bozüyük is the biggest town in Bilecik Province. The district has an area of and borders İnegöl to the west, Pazaryeri to the northwest, Bilecik ...

, and the D.200, between

Eskişehir Eskişehir ( , ; from "old" and "city") is a city in northwestern Turkey and the capital of the Eskişehir Province. The urban population of the city is 898,369 with a metropolitan population of 797,708. The city is located on the banks of the ...

and

Ankara Ankara ( , ; ), historically known as Ancyra and Angora, is the capital of Turkey. Located in the central part of Anatolia, the city has a population of 5.1 million in its urban center and over 5.7 million in Ankara Province, mak ...

, consist of minimal at-grade intersections.

Bridges A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually somethi ...

and

Tunnels A tunnel is an underground passageway, dug through surrounding soil, earth or rock, and enclosed except for the entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube const ...

are common among the system, yet not as plentiful as on motorways.

Numbering

All state highways have a three-digit designation preceded by a ''D''. The system is numbered based on direction and location. Route numbers range from ''010'' to ''977'', while ''010'' to ''490'' are east-west routes and ''505'' to ''977'' are north-south routes. Even-numbered routes generally run north-south, while odd-numbered routes generally run east-west. The only exception to this rule are four north-south routes, D.550, D.650, D.750, D.850 and D.950, that have even-number designations. The second criterion is based on the geographical location of the route. For north-south roads, routes in the west will have lower numbers, while routes in the east have higher numbers. For east-west roads, routes in the north will have lower numbers that get higher towards the south. Main roads are designated as multiples of 100 and 50, with the exception being D.010. Multiples of 100 are main east-west roads, while multiples of 50 are main north-south roads. D.010 is the only exception to this rule.

References

{{State roads in Turkey *

Highways A highway is any public or private road or other public way on land. It is used for major roads, but also includes other public roads and public tracks. In some areas of the United States, it is used as an equivalent term to controlled-access ...

Turkey transport-related lists

System Overview

Numbering

See also

References