Line 4 is one of several lines of the

Tehran Metro The Tehran Metro ( fa, مترو تهران, translit=Metro-ye Tehrān) is a rapid transit system serving Tehran, the capital of Iran. It is the largest metro system in the Middle East. The system is owned and operated by Tehran Urban and Subur ...

. The line is with 19 main stations, 3 stations along a domestic airport-serving branch line and a terminal (depôt). Its section 1, from Ferdowsi Square to Darvazeh Shemiran, opened in April 2008. Section 2 from Darvazeh shemiran to Shohada Square opened in February 2009. Three months later Section 3 from Ferdowsi Square to Engelab Square opened. On July 23, 2012 two more stations were inaugurated, connecting line 4 with line 5. Currently 19 stations serve Line 4's trunk line, plus two more on the branch line serving the country's most-used Domestic Airport,

Mehrabad Airport Mehrabad International Airport ( fa, فرودگاه بین المللی مهرآباد, ''Foroudgâh-e Beyn Almelali-ye Mehrâbâd'') , is an international airport serving Tehran, the capital city of Iran. Prior to the construction of the larger ...

Route

The line begins with an interchange station with Line 5 at Eram-e Sabz Station, north of the Tehran-Karaj Freeway near Eram-e Sabz Park in western

Tehran Tehran (; fa, تهران ) is the largest city in Tehran Province and the capital of Iran. With a population of around 9 million in the city and around 16 million in the larger metropolitan area of Greater Tehran, Tehran is the most popul ...

. It heads southward through Ekbatan town then turns east, running along Karaj Makhsus Road,

Azadi Square The Azadi Square ( fa, میدان آزادی, translit=Meydāne Āzādī, lit=Freedom Square), formerly known as Shahyad Square ( Persian: میدان شهیاد ''Meydāne Ŝahyād'' literally means "''Remembrance of heShah Square''"), is a mai ...

Azadi Street Azadi Avenue or Azadi Street ( fa, خیابان آزادی; ''Khiābān-e Azādi'') is a trunk route in Tehran, Iran connecting Azadi Square to Enqelab Square. The avenue's name means "Freedom" in Persian. Prior to the 1979 Revolution, the av ...

, and

Enghelab Street Enqelab Street (Persian: ; also spelled Enghelab) is a major trunk route in Tehran, Iran connecting Enqelab square to Imam Hossein Square. The street's full name is ''Enqelab-e Islami'' (Islamic Revolution Street) and it was named in honor of t ...

. This main axis continues for . The line turns southeast briefly along Rowshandelan Street and until Shohada Square. Then it resumes an eastward course along Piruzi Street. Then it veers north-eastwards and runs along the

Doran Expressway Doran Expressway is the northern section of eastern part of Tehran Tehran (; fa, تهران ) is the largest city in Tehran Province and the capital of Iran. With a population of around 9 million in the city and around 16 million in the ...

until reaching its eastern terminus, Shahid Kolahdooz Station.

Mehrabad Airport Extension

The branch line starting from Bimeh Station towards

Mehrabad International Airport Mehrabad International Airport ( fa, فرودگاه بین المللی مهرآباد, ''Foroudgâh-e Beyn Almelali-ye Mehrâbâd'') , is an international airport serving Tehran, the capital city of Iran. Prior to the construction of the larger ...

was opened on March 15, 2016. The branch generally acts as an independent line, using unique, more luggage-friendly trains; Bimeh Station is an interchange station. The branch has three stations, including Bimeh Station.ساخت هر مترو چند نفر را مشغول بکار می‌کند؟
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Future

North-West expansion

A extension north from Eram-e Sabz Station is proposed.http://s4.picofile.com/file/8168691218/tehran_map.jpg The new extension will have 4 stations and run along Shahayegh Boulevard and Jannatabad Boulevard so serve the Jannat Abad neighbourhood in Northeastern

Eastern expansion

A extension northeast-wards from Shahid Kolahdooz Station is proposed. The proposed section will run elevated along

Damavand Street Damavand Street is a street in central and eastern Tehran, Iran. {, class="wikitable" style="text-align:center" width="600px" ! text-align="center" colspan="3" , From East to West , - , , , Yasini Expressway Tehran-Damavand Expressway Tel ...

. Then it will continue north along Hajar-ebn Ady Street and Estakhr Street. The extension will serve

Tehranpars Tehranpars or Tehran Pars () is an absorbed city inside the Greater Tehran Area and is located in the north east area of the city. It is considered a neighbourhood of Tehran City and lies in Tehran's eastern flank inside the area of the 4th and 8t ...

and Qanat Kowsar neighbourhoods.

References

{{Tehran Metro navbox, state=expanded Tehran Metro