The National Transportation Safety Board has determined that several factors combined to be the probable cause of a fatal 2017 Amtrak derailment near DuPont, Wash. NTSB said the factors include track owner Sound Transit's failure to take steps to address the dangerous curve where the train derailed-a segment that lacked an operational Positive Train Control system. The board also cited the engineer's excessive speed as he entered the curve and his lack of training on that section of track and the type of locomotive he was operating.
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