M3 (Istanbul Metro)

The rolling stock was delivered in January 2010, and in December of the same year, the first test run of the trains was accomplished.

The line's operation rights were transferred from the İETT bus authority to Istanbul Ulaşım company in June 2011.

After the line signalization system was completely installed in March 2012, test runs began in June 2012.

Özgürlük Meydanı, Haznedar, İlkyuva, Onurkent, Toplu Konutlar and Kayaşehir Merkez stations are bored in situ without removing the ground above, while all other underground stations on the line are built by cut-and-cover method, constructed in a shallow trench and then covered over.

The rolling stock and maintenance depots are located in Olimpiyatköy beyond Olimpiyat Parkı Terminal, stretching over an area of (70,000 m2 (750,000 sq ft)).

The fully air-contioned cars, costing each €1.149 million, feature seats covered with antibacterial textile material.

The signalization of the metro line as well as at the depots and railroad switches, also the vehicle drive-control systems are fully automated.