page_title: Mexico City Metro Line 1
section_title: History
hierarchical_section_title: Mexico City Metro Line 1 / History
caption_attribution_description: English: Persons waiting for the subway in the first days after opening of Mexico City Subway, Mexico City, Mexico. Español: Personas esperando el metro en una estación en los días posteriores a la inauguración del Metro de la Ciudad de México. Ciudad de México, Mexico.
context_page_description: Mexico City Metro Line 1 is one of the twelve metro lines operating in Mexico City, Mexico. Officially inaugurated in 1969, it went to become the first metro line to be built in the country. Its identifying color is pink and it runs through the city from west to east.
context_section_description: The first section of Line 1 was opened on 4 September 1969 as part of Mexico City Metro's first construction stage, it was inaugurated by Gustavo Díaz Ordaz, President of Mexico from 1964 to 1970, and Alfonso Corona del Rosal, Regent of the Federal District Department. The inauguration ceremony took place at the Insurgentes station. The next day the line was opened to the public.
  To the original route Chapultepec – Zaragoza new station Juanacatlán was added to the west on 11 April 1970, and the first correspondencia (a transfer station) became functional on 1 August 1970, when Line 2 was opened. The two westernmost stations Tacubaya and current terminal Observatorio were inaugurated on 20 November 1970 and 10 June 1972 respectively.
  Station Pantitlán was opened on 22 August 1984 as the eastern terminal during a fourth and final expansion. All twenty stations have operated since then, running a total track length of 18.83 km, of which 16.65 km are passenger track. The 1 is the only line in the network that is fully underground except for some surface track in Observatorio used for maintenance.
  Currently, an extension of Line 12 is under construction, this stretch will connect Line 12 with Line 1 at the Observatorio station.
  Authorities warned on 10 August 2020 that Line 1 is in danger of a major fire due to an aging electrical system that is in need of major improvements. Lines 1, 2, and 3 report an average of 2.5 electrical failures daily.
caption: People waiting for the train on Chapultepec platform in the first day of operations of the subway, September 5, 1969.
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