Tehran Metro Line 1

{{Short description|Metro line in Tehran, Iran}}

{{Infobox rail line

| name = Tehran Metro Line 1

| native_name = خط ۱ مترو تهران

| native_name_lang = fa

| logo = File:Tehran Metro Line 1.png

| color = {{rcr|Tehran Metro|1}}

| image =

| image_width =

| caption =

| type = Rapid transit

| system = Tehran Metro

| status =

| locale = Tehran, Tehran Province

| start = Tajrish Station

| end = Kahrizak Station, Parand

| stations = 29+3 (Including IKIA branch)

| routes =

| daily_ridership =

| open = 28 August 2001 (Initially){{Cite web | last=Schwandl | first=Robert | url=http://www.urbanrail.net/as/tehr/tehran.htm | title=Asia - Iran - Tehran Metro | website=UrbanRail.net | year=2010 | access-date=January 17, 2011 | url-status=dead | archive-url=https://web.archive.org/web/20151001023545/http://www.urbanrail.net/as/tehr/tehran.htm | archive-date=October 1, 2015 }}
30 November 2023 (Most recent){{Cite web |title=Parand metro extension inaugurated |url=https://www.railwaygazette.com/metros/parand-metro-extension-inaugurated/65451.article? |date=4 December 2023 |access-date=17 December 2023 |website=Metro Report International}}

| close =

| owner = Tehran Urban and Suburban Railways Organization (Metro)

| operator = Tehran Urban and Suburban Railways Organization (Metro)

| character =

| depot = Tehran-South Depot

| linelength = {{convert|86.9|km|mi|abbr=on}}

| tracklength =

| tracks =

| gauge = {{Track gauge|standard}}

| electrification = Third rail

| speed = 80 km/h (main line)
120 km/h (IKIA branch)

| elevation =

| map =

}}

{{Tehran Metro Line 1 Map}}

Tehran Metro Line 1, coloured red on system maps, runs north–south and is {{convert|86.9|km|mi|sp=us}} of which {{convert|14.9|km|mi|abbr=on}} is underground (from Tajrish station to Shush Station) and the rest at grade (at surface level). The number of stations along the main line is 29 of which 22 stations are underground and seven above. The Airport branch has another three stations, all at grade. {{As of|2005}}, the line's total capacity is 650,000 passengers per day and trains make a scheduled stop of 20 seconds per station. The trains are made up of seven wagons, giving a nominal capacity of 1,300 seated and standing passengers. The maximum speed of the trains is {{convert|80|km/h|mph|abbr=on}} per hour, in practice tempered to an average {{convert|45|km/h|mph|abbr=on}} due to station stops, but {{convert|120|km/h|mph|abbr=on}} on the Airport branch, so travel time for the {{convert|49|km|abbr=on}} from Shahed - Bagher Shahr Metro Station (short Shahed station) to Parand is just 34 minutes.{{Cite web |title=Phase 2 of Tehran Metro Line 8 Ready |url=https://financialtribune.com/articles/people/69551/phase-2-of-tehran-metro-line-8-ready |date=2 August 2017 |access-date=17 December 2023 |website=Financial Tribune}}

Line 1 runs mostly north–south, and from Shahed station has interchange platforms for its extension, sometimes in between termed as Metro Line 8, to Imam Khomeini International Airport completed in August 2017 and extended to Parand in December 2023.

First stage of the line was from Mirdamad station to Shahed station and opened in August 2001. A {{convert|4.1|km|mi|sp=us}}, three-station extension of the line from Mirdamad station to Qolhak opened on May 20, 2009; a {{convert|4|km|mi|sp=us}}, four-stations second phase from Qolhak to Tajrish Square was completed in 2012.[http://metro.tehran.ir/Default.aspx?tabid=247 List of Tehran metro stations (Tehran Metro official website)] Construction was to be completed by March 2007 but faced major issues due to large boulders and rock bed in part of the tunnels as well as water ingress/drainage issues. It also faced major financing issues as the government refused to release funds earmarked for the project to the municipality.