The State Railways of the Republic of Turkey, abbreviated as TCDD, is a government-owned national railway company responsible with the ownership and maintenance of railway infrastructure 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.
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.