CNN Forensic Files February 19, 2014 07:38:00
And there was no brake application. whatever caused the crash, the engineer never saw it. investigators also discovered the signals on the track were green. >> the signals are controlled by a current that goes through the rail, and if the rail breaks, the signal will immediately turn red. so the signal didn't turn red. >> the bridge was originally built in three sections. the southern section was a 165-foot steel truss bridge. the center section, a single 140-foot steel girder, was originally designed to pivot so river traffic could pass through. the northern section was simply 192 feet of tra...
Source: archive.org