line going westward from Mixcoac with two new stations, as in the undergoing expansion. Nevertheless, the connection with Line 1 at Observatorio was not planned in the projects. 2021 overpass collapse On 3 May 2021, a section of an overpass collapsed at the Olivos station, resulting in 26 deaths and 79 injuries. Route Mixcoac station, the provisional western terminus of the line, lies along Extremadura Avenue (Eje 7 Sur), in the neighborhood of the same name. The line heads eastward along the avenue to Insurgentes Sur station at the intersection with Insurgentes Sur Avenue. Eje 7 Sur changes its name to Félix Cuevas Avenue and the track continues to Hospital 20 de Noviembre (next to the hospital of the same name). As the line reaches Zapata station, the avenue changes its name to General Emiliano Zapata Avenue, and continues to Parque de los Venados station (next to the public park of the same name). As the line reaches División del Norte Avenue, the line turns and runs along it. Then, when the route gets to Popocatépetl Avenue (Eje 8 Sur), it turns again and arrives at Eje Central station, located below the avenue of the same name. As the line arrives at Ermita station, the avenue changes its name to Calzada Ermita Iztapalapa. It passes Mexicaltzingo station and later arrives at Atlalilco station. The line continues until the intersection with Tláhuac Avenue (Eje 9 Sur and later Eje 10 Sur) and the track emerges to the surface to become an elevated railway. It continues along the avenue to Culhuacán, San Andrés Tomatlán, Lomas Estrella, Calle 11, Periférico Oriente, Tezonco, Olivos, Nopalera and Zapotitlán stations. When Tláhuac Avenue reaches Canal del Acalote Avenue, the track turns and descends to the street level. It arrives at Tlaltenco station, and later to the southeastern terminal of Tláhuac, along San Rafael Atlixco Avenue. Rolling stock The FE-10 model, by Construcciones y Auxiliar de Ferrocarriles (CAF), is a steel-wheeled train model exclusively used on Line 12. As of May 2021, 30 trains are operating in the line. The trains were built by CAF in Spain. Station list The stations from west to east: {| class="wikitable" rules="all" |- !rowspan="2" | No. !rowspan="2" | Station !rowspan="2" | Date opened !rowspan="2" | Level !colspan="2" | Distance (km) !rowspan="2" | Connection !Pictogram !rowspan="2" | Location |- !style="font-size: 65%;"|Betweenstations !style="font-size: 65%;"|Total !Description |- |style="background: #; color: white;"|01 |Mixcoac | rowspan="20"