The NTSB determined that the trains collided because one train's crew was likely asleep.Photo – NTSB report: Photo courtesy of News Radio KEEL, Shreveport, Louisiana.
The National Transportation Safety Board (NTSB) has determined that two Union Pacific Railroad trains collided in Texas in September 2015 because the crew of one train was likely asleep before the accident occurred, the agency announced this week.
Contributing to the incident near Texarkana, Texas, was the lack of a functioning positive train control system, according to the NTSB's accident brief.
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