The Mexico City elevated subway line that collapsed this week, killing 25 people, was problem-plagued and poorly designed from the day of its inauguration in 2012.
Passengers and authorities alike came to fear that the screeching and bouncing of wheels on the line’s tight curves were quickly wearing away the tracks, raising fears of a derailment. But few expected the thing would simply collapse.
However, an official 2017 survey of damage caused by a deadly 7.1 magnitude quake showed indications of construction defects that should have shut the line down immediately, according to an experienced structural engineer.
Read the full story at NBC News
