 | |
 Map of the TCDD railway network as of 2023. TCDD owns and maintains all railway infrastructure in Turkey, while TCDD Transport owns and runs the trains. | |
 YHT high-speed rail service is the railway's premier train service. Here, HT80004 waits to depart the new ATG terminal in Ankara, bound for Konya. | |
| Overview | |
|---|---|
| Headquarters | Ankara, Turkey |
| Reporting mark | TCDD |
| Locale | Turkey |
| Dates of operation | 1929–present |
| Predecessor | State Railways and Seaports Administration |
| Successor | TCDD Transport (Railway operations only) |
| Technical | |
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
| Previous gauge | 1,520 mm (4 ft 11+27⁄32 in) Broad gauge (Sarıkamış-Gyumri) 750 mm (2 ft 5+1⁄2 in) Narrow gauge (Sarıkamış-Erzurum) |
| Electrification | 25 kV, 50 Hz AC Overhead line |
| Length | 12,532 kilometres (7,787 mi)[1] |
| Other | |
| Website | www.tcdd.gov.tr |
 | This article may be in need of reorganization to comply with Wikipedia's layout guidelines. The reason given is: duplication with rail transport in Turkey might be solved with excerpts. (November 2024) |
The State Railways of the Republic of Turkey (Turkish: Türkiye Cumhuriyeti Devlet Demiryolları), abbreviated as TCDD, is a government-owned national railway company responsible for the ownership and maintenance of railways in Turkey, as well as the planning and construction of new lines. TCDD was formed on 4 June 1929 as part of the nationalisation of railways in Turkey.[2]
The Turkish State Railways owns and maintains all public railways in Turkey. This includes railway stations, ports, bridges and tunnels, yards and maintenance facilities. In 2016, TCDD controlled an active network of 12,532 km (7,787 mi) of railways, making it the 22nd-largest railway system in the world. Apart from railway infrastructure, TCDD also owns several rail transport companies within Turkey as well as a 50% share of the İzmir-area commuter rail system, İZBAN.
Prior to 2017, TCDD also operated all railways in Turkey. However, with the government taking steps to privatise some of the Turkish railway network, rolling stock and operations were handed over to TCDD Transport and TCDD formally ceased all railway operations on 31 December 2016.[3]