Suburban trains are running on three metropols of Turkey: Istanbul, Izmir and Ankara.
Suburban system is under construction in two cities: Gaziantep and Kayseri. Suburban train of Balikesir is on paper. Suburban train of Adapazari (Adaray) is suspended.
Marmaray is 77-km-long suburban system connecting one end of Istanbul to the other. It connects two sides of Istanbul (thus Asia and Europe) via Marmaray tunnel under Bosphorus. Currently 13.6 km of the system is on service, where rest is planned to be commissioned by the end of 2018.
Currently, Marmaray trains call at five stations; two stations in Asian side (Ayrilikcesmesi and Uskudar) and three stations in European side (Sirkeci, Yenikapi and Kazlicesme).
136-km-long Izmir suburban line (Izban) is the longest and busiest suburban system in Turkey. The network will reach to 185 km after Aliaga-Bergama strech is commissioned.
Izban is succesfully integrated with metro, tram and bus services. It’s possible to reach to airport, even to Selcuk where Ephesus is located.
37-km-long suburban system of Ankara, Baskentray, had been commissioned in 2018 after renewal works.
Baskentray trains cross Ankara from Kayas in one end to Sincan in the other. Suburban trains are also calling at Ankara high speed train station. It’s possible to interchange metro from suburban trains.