Kadıköy is the western terminal station on the M4 line of the Istanbul Metro. Located beneath Haydarpaşa Rıhtım Caddesi (Street) it is serviced by the M4 between 6:00 and 0:04. The station has two tracks serving an island platform. Kadıköy opened on 17 August 2012 along with fifteen other stations on the M4 line. The Turkish Prime Minister Recep Tayyip Erdoğan along with the Mayor of Istanbul, Kadir Topbaş and other members of government inaugurated the line from Kadıköy and boarded a train to Kartal.