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Re: Mexico City Metro collapse (and here?)

Posted by K. Trout on Fri May 7 01:46:04 2021, in response to Re: Mexico City Metro collapse (and here?), posted by Bill Newkirk on Tue May 4 15:20:51 2021.

From the onset of service, Line 12 faced issues with trains on elevated sections, necessitating speeds as low as 5 km/h (3 mph) on some segments due to derailment concerns.[6][15] The Atlalilco–Tláhuac section, including Olivos and Tezonco stations, was closed 17 months after the line's opening for a further 20 months to repair technical and structural faults.[6][18]

A special commission was created to investigate the causes and to hold officials accountable for the errors that caused the closure.[19] Independent consulting group SYSTRA was asked to submit a report on their investigation. After they reviewed over 2,900 documents and tested the tracks,[20] the group concluded that errors were present during the "planning, design, construction and operation" of the line.[21]