List of Tehran Metro stations  Tehran's Metro system is planned to consist of a total of seven lines; 7 lines (Lines 1–7), six of which are metro-service lines (Lines 1–4 and 6 & 7), are currently operational. Lines 1 and 2 cross each other at "Imam Khomeini" station. Line 5 is a suburban rail line that attaches to the Line 2 at the "Tehran (Sadeghieh)" station; it extends into the Karaj area and is connected to the rail line of city of Karaj & line "Imam Khomeini Airport" is a metro express. Line 1 consists of 32 stations. Line 2 consists of 22 stations. Line 3 consist of 24 active stations. Line 4 consists of 22 operating stations. Line 5 is a suburban rail line that consists of 12 stations. Line 6 is a line which consists of 31 (5 active) stations. Line 7 is a line which consists of 22 (11 active) stations.