Year, 1971
Sofretu and RATP bagan preliminary studies about Tehrans socio-economic and traffic condition forecast up to 1991.

Year, 1974
Street - Metro proposal was tendered.
The street-metro system recommended a road network with a loop express way in the central area and 2 highways for new urban areas and a 7-line metro network which were complemented by bus network and taxi services.

Year, 1975
The law of Tehran Urban & Suburban Railway Company (Metro) establishment was ratified.


Year, 1976
Metro construction studies and executive jobs were bagun.

Years, 1980 - 86
Metro construction was stopped due to imposed war (Iran - Iraq war)

Year, 1995
Signing contract in order to provid E & M equipment for Lines 1, 2 and 5

Year, 1999
Inauguration of Line 5 (from Tehran (Sadeghieh) to Karaj station)

Year, 2000
Inauguration of Line 2 (from Tehran (Sadeghieh) to Imam Khomeini station)

Year, 2001
Inauguration of Line 1 (from Darvazeh Dolat to Ali Abad station)



Year, 2002
* Inauguration of Line 1 (from Shahid Haghani to Darvazeh Dolat station)
* Inauguration of Line 1 (from Ali Abad to Shahr-e Rey station)
* Putting into operation of West Terminal

Year, 2003
Inauguration of Line 1 (from Shahr-e Rey to Haram-e Motahar station)

Year, 2004
Inauguration of Line 2 (from Imam Khomeini to Baharestan station)

Year, 2005
* Putting into operation of Iran Khodro station (Line 5)
* Inauguration of Line 5(from Karaj to Golshahr station)
* Putting into operation of Chitgar station (Line 5)
* Putting into operation of Baghershahr station (Line 1)
* Putting into operation of Fath abad Terminal

Year, 2006
Inauguration of Line 2 (from Baharestan to Daneshgah-e Elm-o San'at station)
* Putting into operation of Sabalan & Darvazeh shemiran stations (Line 2)
* Putting into operation of Nezam abad & Golbarg stations (Line 2)
* Putting into operation of Atmosfer station (Line 5)
* Putting into operation of Imam Hossein station (Line 2)

Year, 2007
* Inauguration of Line 4(from Darvazeh Shemiran to Ferdowsi station)

Year, 2008
* Putting into operation of Shohada station (Line 1)
* Putting into operation of Shahid Bagheri & Tehran pars stations (Line 2)
* Putting into operation of Ekbatan station (Line 5)

Year, 2009
* Inauguration of Line 1 (from Mirdamad to Gholhak station)
* Putting into operation of Meydan-e Enghelab-e Eslami (Line 4)

Year, 2010
* Putting into operation of Shahid Sadr & Gheytariyeh stations (Line 1)
* Putting into operation of Farhangsara stations (Line 2)
* Putting into operation of Shahid Kolahdouz, Nabard & Vali-e Asr stations (Line 4)

Year, 2011
* Putting into operation of Doctor Habib-o-llah, Tohid & Meydan-e Azadi & Ostad Moein & Sheykh-o-raeis station (Line 4)
* Putting into operation of Kahrizak station (Line 1)