The Istanbul Metro comprises five lines (the M1, M2, M3 and M6 on the European side, and the M4 on the Asian side) with several other lines (such as the M5, M7, and M8) and extensions under construction.
Metro Istanbul meliputi tiga jalur (M1 dan M2 di sisi Eropa serta M4 di sisi Asia) dengan beberapa jalur lainnya (seperti M3, M5, M7, dan Metro-Mini M6) dan ekstensi yang dalam tahap pembangunan.