Metro Line 12 Crawls for Hours After Track-Zone Fault Between Mixcoac and Tláhuac

Mexico City's Sistema de Transporte Colectivo (STC) Metro Line 12 operated at reduced speed along its entire Mixcoac–Tláhuac route from around midday on September 23 after technical staff flagged a fault in the track-control system near the Tláhuac–Tlaltenco interstation, with a probable fiber-optic cut suspected; STC said only that a 'revisión en zona de vías' was underway and that trains were running slow while crews worked to normalize service. Concurrent rainfall-related safety protocols also slowed Metrobús Lines 2, 3, 4, 8, 9, A, and B. Riders reported waits of over 40 minutes and overcrowded platforms during the afternoon commute; STC deployed empty trains to relieve saturated stations. STC said no station closures were planned and denied social-media claims of a multi-day shutdown between September 25 and October 5.