List of Mexico City Metro lines
As of 2014[update], the system is composed of 12 lines denominated 1 through 9, 12, A and B, totalling 226.5 km (140.7 mi) of track length and 195 stations.
Of all stations, 115 are underground (either in shallow box-tunnels or deep circular tunnels), 54 are at street-level and 26 are elevated.
The line was brought to its current length on August 22, 1984 with its final extension from Zaragoza to Pantitlán.
It starts at the border of the Federal District and the State of Mexico and ends in the city south.
Line 2 was the scene of the worst accident in the Mexico City Metro's history on October 20, 1975, when a crash occurred between two trains at Viaducto Station.
The line has a general north–south direction passing through the western end of downtown Mexico City and its color is olive green.
It is built under Insurgentes, Guerrero, Zarco, Balderas, Cuauhtémoc, Universidad, Copilco and Delfín Madrigal avenues.
The line has a general north–south direction and is located east of the city center and its color is aqua.
In the original blueprint, this line was planned to extend to the north all the way to Ecatepec, Mexico State.
The line has a general north-west to south-east direction relative to the city center and its color is yellow.
Line 5 runs to Mexico City International Airport (Terminal Aérea station).
This line has a west–east direction running north of the city center and its color is scarlet red.
Line 8 was the next to last route of the network to be opened, on July 20, 1994 by then President Carlos Salinas de Gortari and then regent of the city, Manuel Aguilera Gómez.
Construction plans for the line date back to much earlier, but they were put on hold due to significant redevelopment.
Line 8 runs in a general south-east direction, beginning near the city center, and its color is bright green.
According to the Sistema de Transporte Colectivo, the volume of people moved in this line was 117,386,342 persons in 2006.
Line A runs in a general south-east direction, east of the city center, and its color is purple.
Line B starts north of the city center and runs in a general north-east direction relative to it.
[5] Government nicknamed it the línea del Bicentenario, commemorating the 200th anniversary of the beginning of Mexican War of Independence on September 16, 1810 and promising to deliver all twenty stations by April 30, 2012.
At that date, President Calderón and Mayor Marcelo Ebrard opened the line to service.
