Turkish State Railways in the context of "Derince"

TCDD Transport or Turkish State Railways Transport (Turkish: TCDD Taşımacılık, reporting mark TCDDT) is a government-owned railway company responsible for the operations of most passenger and freight rail in Turkey. The company was formed on 14 June 2016, splitting off from Turkish State Railways (TCDD) to take over railway operations, while TCDD would continue to administer railway infrastructure. TCDD Taşımacılık officially began operations on 1 January 2017.

TCDD Taşımacılık operates trains on a network of over 12,430 km (7,720 mi) within 59 of the 81 provinces in Turkey.

Yüksek Hızlı Tren or YHT (English: High Speed Train) is a high-speed rail service operated by TCDD Transport in Turkey. Branded as "YHT", they are TCDD Transport's flagship passenger train service and the only high-speed rail service in the country. As of 2025, the network spans 1,385 km (860.6 mi) and serves major cities like Istanbul, Ankara, Eskişehir, İzmit, Konya, and Sivas. Expansion of the system is underway and the network is expected to reach Edirne, Afyonkarahisar, Adana, and İzmir in the 2020s.

High-speed rail in Turkey was originally planned to be built as early as 1975, but it wasn't until 2003 that the construction of the Ankara-Istanbul high-speed railway began. The first section was completed in 2007, between Eskişehir and Esenkent with passenger operations beginning on 13 March 2009 between Eskişehir and Ankara. On 23 August 2011, the Turkish State Railways inaugurated its second high-speed railway to Konya and on 25 July 2014, the railway was opened to Istanbul. The State Railways have integrated the YHT network with other projects done in major urban areas. In Ankara, the route was expanded from three tracks to five tracks to allow for frequent Başkentray commuter rail service, along with a new high-speed rail concourse at Ankara station. In Istanbul, YHT trains use the Marmaray Tunnel to traverse the Bosphorus Strait and reach the European side of the city.

Kadıköy (Turkish pronunciation: [kaˈdɯkøj] ) is a municipality and district in Istanbul Province, Turkey. Its area is 25 km, and its population is 467,919 (2023). It is a large and populous area in the Asian side of Istanbul, on the northern shore of the Sea of Marmara. It partially faces the historic city centre of Fatih on the European side of the Bosporus. It is bordered by the districts of Üsküdar, to the northwest, Ataşehir, to the northeast, and Maltepe, to the southeast.

Kadıköy was known in classical antiquity and during the Roman and Byzantine eras as Chalcedon (Greek: Χαλκηδών). Chalcedon was known as the 'city of the blind'. The settlement has been under control of many empires, finally being taken by the Ottomans before the fall of Constantinople. At first, Chalcedon was rural, but with time it urbanized. Kadıköy separated from the Üsküdar district in 1928.

Turkey has a state-owned railway system built to standard gauge (1,435 mm (4 ft 8+1⁄2 in)) which falls under the remit of the Ministry of Transportation and Infrastructure. The primary rail carrier is the Türkiye Cumhuriyeti Devlet Demiryolları (TCDD) (Turkish State Railways) which is responsible for all long-distance and cross-border freight and passenger trains. A number of other companies operate suburban passenger trains in urban conurbations.

Native railway industry extends to the production of locomotives, passenger vehicles and freight wagons; some vehicles are also produced through licensing agreements and cooperation with foreign countries.

TCDD HT65000 is a series of twelve high-speed electric multiple units built by the Construcciones y Auxiliar de Ferrocarriles (CAF) of Spain for the Turkish State Railways (TCDD), The EMUs are used on the Turkish high-speed railway network and can reach a maximum commercial speed of 250 km/h.

TCDD HT80000, also known as Siemens Velaro TR, is a series of high-speed electric multiple units built by Siemens for the Turkish State Railways. The EMUs are used for the Yüksek Hızlı Tren (YHT) services on the Turkish high-speed railway network and especially on the Polatlı–Konya high-speed railway, where they can reach a maximum speed of 300 km/h (186 mph).

Başkentray (English: CapitalRail), formerly known as the Ankara suburban (Turkish: Ankara banliyösü), is the name of the 37 km (23 mi) long commuter rail line in Ankara, Turkey. It is operated by TCDD Taşımacılık on trackage owned by the Turkish State Railways.