Line M2 is 16.5km long with 12 stations and runs from Kizilay, where it interchanges with lines M1 and M3, to Çayyolu in the southwest of the Turkish capital. An end-to-end journey time of 25 minutes with trains running at a maximum speed of 80km/h is envisaged.

The project has been implemented by a consortium led by Ansaldo STS and including Turkish contractors. Ansaldo STS was responsible for the signalling and has supplied communications-based train control (CBTC), IXL interlockings, automatic train control and data communications systems on Line M2.

Ansaldo STS was responsible for installing CBTC on lines M3 and M4, and has also updated the signalling on the original Line M1 to the same standards to enable interoperability between the lines. However, full functionality of the CBTC will not be available until the entire project is completed next year.