In 2013, the ASF audited the Line 12 of the Mexico City Metro. The institution found 11 anomalies, concluding that "in general terms, the Government of the Federal District did not comply with the applicable legal and regulatory provisions". After the 2017 Puebla earthquake, the ASF made observations of damage to an elevated section of track between the Olivos and Tezonco stations, which collapsed in May 2021.