Year, 1971
Preliminary studies including Tehran’s socio-economic and traffic condition and forecast up to 1991 began by Sofretu and RATP.

Year, 1974
Final report with a so-called (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
Ratification of the law of “Establishment of Tehran Urban & Suburban Railway Co. (Metro)”.

Year, 1976
Beginning of the Geological, land surveying and executive studies.

Years, 1980 - 86
Construction was stopped due to imposed war.

Year, 1995
Contract for E & M for Lines 1, 2 and 5.  

Year, 1999
Tehran - Karaj suburban line (Line 5) was officially inaugurated.

Year, 2000
Mobilization of the western part of Line 2 between Sadeghieh and Imam Khomeini stations.

Year, 2001
Line 1 from Darvazeh Dolat to Ali abad with 8.5 km length was mobilized.

Year, 2002

Putting into operation of Line 1 from Mirdamad to  Darvazeh Dolat with 6.5 km length.

Putting into operation of Line 1 from Ali abad to Shahr-e-Rey with 3.9 km length.

Mobilization of West Terminal.

Year, 2003
Putting into operation of Line 1 from Shahr-e-Rey to Haram-e-Motahar with 6.9 km length.  

Year, 2004
Putting into operation of Line 2 from Imam Khomeini to Baharestan with 2 km length.  


Year, 2005

Putting into operation of Iran Khodro station (Line 5)

Putting into operation of Line 5 from Karaj to Golshahr with 10 km length.

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

Putting into operation of  Line 2 (East part) with Elm o Sanat, Sar sabz and Shahid Madani stations.

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 (AS) station (Line 2)

Year, 2007

Putting into operation of Ekbatan station (Line 5)

Putting into operation of Shohada station (Line 1)