operating towards Observatorio and connecting Lines 1 and 5. Before it was opened, Zaragoza served as the terminal of Line 1, thus the workshops are found between both stations. The location of the workshop indirectly benefited the operations on the line as it allows the trains to depart every 90 seconds. It is an underground station whose interstation tunnel to Zaragoza measures . The passenger transfer tunnel that connects Line 1 with Line A has an approximate length of , and is the third-longest in the system after those of Atlalilco and La Raza stations. In 2016, the station received renovation work. The station will be closed in 2022 for modernization work on the tunnel and technical equipment of the line. Line 5 The line was built by Cometro and its first section was opened on 19 December 1981, operating toward Consulado station. It is an at-grade station whose interstation with Hangares goes from the street level to the underground one; the section is long. Line 9 The line was built by Cometro and its first section was opened on 26 August 1987, operating toward Centro Médico station. It is an elevated station whose interstation with Puebla measures . Additionally, there is a train shed after the station. During the station's construction, a tusk and a molar of a mammoth were found at a depth of . Line A The line was built by Empresas ICA and it was opened on 12 August 1991, operating towards La Paz station, located in the municipality of the same name of the State of Mexico. Unlike the other 11 lines, Line A is described as a light metro system whose first interstation with Agrícola Oriental is long. It is the line's only underground station as the trains pass below the Line 5 tracks. As it incorporates Calzada Ignacio Zaragoza Avenue, the line emerges to the street level. To build the station, ICA constructed a false rectangular-shaped tunnel using the Milan method. They added floor slabs and the ceiling is made up of prefabricated slabs. Above the ceiling, they added pavement wherever it was required. From its opening until 12 December 2013, users coming from Line A had to make a double payment to access the other lines and vice versa. Landmarks Inside the station, there is a cultural display, an Internet café, a women's defense module, and a health module. Outside the station,