It sounds like their moving block system was working, but it has been slow-motion failing for a decade due to maintenance budget. So the emergency WhatsApp bac

It sounds like their moving block system was working, but it has been slow-motion failing for a decade due to maintenance budget. So the emergency WhatsApp backup has been normalized as operations. But normalizing drivers handling their phones introduces new risks. So, yeah - there is only one way this ends. The alternative is follow Toronto and New York, and slow the trains down and require full exclusion. But that has its own problems reducing system capacity, which Mexico City can scarce afford.