The National Transportation Safety Board (NTSB) released its preliminary report on the Amtrak 501 accident in Washington state and explains that positive train control (PTC) could have prevented the over speed condition.
The train, which was carrying 77 passengers and five Amtrak employees on its inaugural run along a new route, derailed on a 30 mph curve with its last recorded speed being 78 mph. The lead locomotive, the power car and two passenger railcars derailed onto Interstate 5 below the right-of-way. Three train passengers were killed and another 70 people, including eight on the highway, were injured in the accident.
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