The first subway of the Anatolian Side Kadıköy-At the accident occurred while the trial expedition in Kartal metro.
Allegedly, the subway train left a wagon before departing from Kartal station. Completing the expedition, the train returned to Kartal station, but the wagon left behind was forgotten. The train hit the forgotten car, and the crash was damaged. Istanbul Metropolitan Municipality officials went to the scene after the accident that occurred at night. The foundation was laid 7 years ago by Prime Minister Tayyip Erdoğan KadıköyThe opening of the Kartal metro line was delayed many times. It was announced that the last line was planned to start on the Ramadan Feast. It was reported that Prime Minister Erdogan, who made a trial flight on 30 May 2011, will open the line.