The investigation indicates that the train derailed after traveling eastbound over a switch intended for a straight move that was in fact misaligned for a diverging route.
NTSB Investigating Factors in Greyhound Illinois Crash
During a press conference, the NTSB said the investigation will center around human performance, survival factors, and motor carrier factors, as well as rest area safety, bus occupant protection, potential driver fatigue, and medical fitness.
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