Positive train control (PTC) was not implemented on either the rail line or the Amtrak Cascades 501 train that derailed in DuPont, Washington, on Monday, the National Transportation Safety Board (NTSB) announced yesterday.
NTSB investigators confirmed that the Sound Transit, which owns the track from which the train derailed, had centralized traffic control (CTC), which allows for dispatch direction over the train.
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