Extensions

Initially line 3 was expanded to the north. On August 25, 1978, the first extension of line 3 was inaugurated, with the inclusion of the La Raza station "La Raza (station)."

On December 1, 1979, the line was expanded with three surface stations: Potrero "Potrero (station)"), Basílica "Deportivo 18 de Marzo (station)") and Indios Verdes "Indios Verdes (metro station)"). This last station was established as the northern terminus of the line.[2]​ The three stations were built in a surface caisson; additionally, the construction was planned to place an underground caisson to the south of the Basilica station, with the intention of using it for the future construction of line 6. For line 8, another underground caisson was built, located under Calzada Ticomán, although it was never used.[8]​ The original project of the line contemplated the construction of the "Zacatenco" station. north of Basilica station. He also proposed building the Indios Verdes station further north. However, with the transfer of the Indios Verdes station project to its final location, next to Calzada Ticomán, the Zacatenco station was canceled due to the proximity between the stations.[10]​ The cost of this first group of expansions was 3,500 million pesos.[11]​.

Later, the expansion of the line to the south began. El 7 de junio de 1980 se inauguró la estación Centro Médico "Centro Médico (estación)"), dos meses después, el 25 de agosto, fueron abiertas otras cuatro estaciones más: Etiopía "Etiopía-Plaza de la Transparencia (estación)"), Eugenia "Eugenia (estación)"), División del Norte "División del Norte (estación del Metro de Ciudad de México)") y Zapata "Zapata (estación)"). The Ethiopia station was initially going to be called "Narvarte." También se contemplaba edificar la estación «Obrero Mundial», entre las estaciones Centro Médico y Etiopía, aunque nunca fue construida.[7]​.

On August 30, 1983, the last five stations of line 3 were inaugurated: Coyoacán "Coyoacán (station)"), Viveros "Viveros-Derechos Humanos (station)"), Miguel Ángel de Quevedo "Miguel Ángel de Quevedo (station)"), Copilco "Copilco (station)") and Universidad "Universidad (Mexico City Metro station)").[2] The first three were built. Through tunnels, the Copilco station was built by open-air excavation and the Universidad station was built at street level.[8] The Coyoacán station was initially going to be named "Centro Bancomer", in reference to the headquarters of the Bancomer bank, located near the station. However, its name was changed shortly before the station's inauguration to avoid referring to commercial names in Metro stations. The name chosen was questioned because it refers to the Coyoacán delegation, despite not being located in that district.[12]​ The initial expansion project contemplated building the "Popocatépetl" station, between Zapata and Coyoacán, which was not carried out due to the proximity between the stations.[10]​ With this latest expansion, line 3 completed 23.6 kilometers of tracks, of which 21.2 kilometers are service and 2.4 kilometers are for maneuvers. Universidad station was also established as the southern terminus of the line.[2]​.

After the earthquake of September 19, 1985, the Balderas "Balderas (station)") and Juárez "Juárez (station)" stations were temporarily closed due to the risk of collapse of the surrounding buildings. On September 23, the Balderas station was reopened and the Juárez station the next day.[13]​.

Central Control Post Fire

On January 9, 2021, the line was affected by the fire at Central Control Post I, which left six lines in the system without electricity.[14] Line 3 remained without service until February 1. During the time it was out of service, a transportation network was established with various services, including Metrobús, Trolleybús and RTP.[15]​.

Train crash at the Potrero-La Raza interstation

On January 7, 2023, shortly after 9 in the morning, a collision between 2 trains occurred at the Potrero "Potrero (station)")-La Raza "La Raza (station)" interstation, where a train that was heading to the La Raza station in the direction of Universidad "Universidad (Mexico City Metro station)"), overtook another train that was inside the first tunnel of the line that begins at the Potrero station, whose train He was heading to the La Raza station and that, according to instructions from the checkpoint, he was detained. This incident caused the death of one person and injured 59 people, including the driver of the crashed unit with which it collided.[16]​.

Due to this incident, metro line 3 was partially suspended, in the section Indios Verdes "Indios Verdes (metro station)") to Guerrero "Guerrero (station)"), from that day until January 10. In a press conference offered by the head of the capital's government, Claudia Sheinbaum, to update the figures caused by the accident, it was mentioned that Line 3 would partially depart from the Tlatelolco station to the Universidad station, offering the emerging service with units of the Passenger Transport Network (RTP) along with the Metrobús "Metrobús (Mexico City)"), the Trolleybús and the Mexibús, free of charge for the transfer of users who go mainly to the Historic Center of Mexico City.[17]​.

Extensions

Initially line 3 was expanded to the north. On August 25, 1978, the first extension of line 3 was inaugurated, with the inclusion of the La Raza station "La Raza (station)."

On December 1, 1979, the line was expanded with three surface stations: Potrero "Potrero (station)"), Basílica "Deportivo 18 de Marzo (station)") and Indios Verdes "Indios Verdes (metro station)"). This last station was established as the northern terminus of the line.[2]​ The three stations were built in a surface caisson; additionally, the construction was planned to place an underground caisson to the south of the Basilica station, with the intention of using it for the future construction of line 6. For line 8, another underground caisson was built, located under Calzada Ticomán, although it was never used.[8]​ The original project of the line contemplated the construction of the "Zacatenco" station. north of Basilica station. He also proposed building the Indios Verdes station further north. However, with the transfer of the Indios Verdes station project to its final location, next to Calzada Ticomán, the Zacatenco station was canceled due to the proximity between the stations.[10]​ The cost of this first group of expansions was 3,500 million pesos.[11]​.

Later, the expansion of the line to the south began. El 7 de junio de 1980 se inauguró la estación Centro Médico "Centro Médico (estación)"), dos meses después, el 25 de agosto, fueron abiertas otras cuatro estaciones más: Etiopía "Etiopía-Plaza de la Transparencia (estación)"), Eugenia "Eugenia (estación)"), División del Norte "División del Norte (estación del Metro de Ciudad de México)") y Zapata "Zapata (estación)"). The Ethiopia station was initially going to be called "Narvarte." También se contemplaba edificar la estación «Obrero Mundial», entre las estaciones Centro Médico y Etiopía, aunque nunca fue construida.[7]​.

On August 30, 1983, the last five stations of line 3 were inaugurated: Coyoacán "Coyoacán (station)"), Viveros "Viveros-Derechos Humanos (station)"), Miguel Ángel de Quevedo "Miguel Ángel de Quevedo (station)"), Copilco "Copilco (station)") and Universidad "Universidad (Mexico City Metro station)").[2] The first three were built. Through tunnels, the Copilco station was built by open-air excavation and the Universidad station was built at street level.[8] The Coyoacán station was initially going to be named "Centro Bancomer", in reference to the headquarters of the Bancomer bank, located near the station. However, its name was changed shortly before the station's inauguration to avoid referring to commercial names in Metro stations. The name chosen was questioned because it refers to the Coyoacán delegation, despite not being located in that district.[12]​ The initial expansion project contemplated building the "Popocatépetl" station, between Zapata and Coyoacán, which was not carried out due to the proximity between the stations.[10]​ With this latest expansion, line 3 completed 23.6 kilometers of tracks, of which 21.2 kilometers are service and 2.4 kilometers are for maneuvers. Universidad station was also established as the southern terminus of the line.[2]​.

After the earthquake of September 19, 1985, the Balderas "Balderas (station)") and Juárez "Juárez (station)" stations were temporarily closed due to the risk of collapse of the surrounding buildings. On September 23, the Balderas station was reopened and the Juárez station the next day.[13]​.

Central Control Post Fire

On January 9, 2021, the line was affected by the fire at Central Control Post I, which left six lines in the system without electricity.[14] Line 3 remained without service until February 1. During the time it was out of service, a transportation network was established with various services, including Metrobús, Trolleybús and RTP.[15]​.

Train crash at the Potrero-La Raza interstation

On January 7, 2023, shortly after 9 in the morning, a collision between 2 trains occurred at the Potrero "Potrero (station)")-La Raza "La Raza (station)" interstation, where a train that was heading to the La Raza station in the direction of Universidad "Universidad (Mexico City Metro station)"), overtook another train that was inside the first tunnel of the line that begins at the Potrero station, whose train He was heading to the La Raza station and that, according to instructions from the checkpoint, he was detained. This incident caused the death of one person and injured 59 people, including the driver of the crashed unit with which it collided.[16]​.

Due to this incident, metro line 3 was partially suspended, in the section Indios Verdes "Indios Verdes (metro station)") to Guerrero "Guerrero (station)"), from that day until January 10. In a press conference offered by the head of the capital's government, Claudia Sheinbaum, to update the figures caused by the accident, it was mentioned that Line 3 would partially depart from the Tlatelolco station to the Universidad station, offering the emerging service with units of the Passenger Transport Network (RTP) along with the Metrobús "Metrobús (Mexico City)"), the Trolleybús and the Mexibús, free of charge for the transfer of users who go mainly to the Historic Center of Mexico City.[17]​.