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The initial NTSB report seems to infer a misinterpretation by the two crew members at the head end. The locomotives possessing both outward facing cameras and inward facing cameras with audio. The inward facing camera indicating that neither crew member was distracted by the use of electronic devices. The driver (engineer) made a comment about an Overspeed just prior to the derailment. Is this a track Overspeed, or a locomotive traction Overspeed ? An emergency brake application occurred, but it is not yet understood how this occurred and may have originated from the rear locomotive, the train being top and tail. Positive Train Control is being installed on the subdivision, but not yet in operation. The speed board indicating the curve speed is situated at a distance from that curve. The full NTSB report will probably take 12 to 18 months before publication. I am also waiting for the EUB report on the Bad Aibling zugkollision in Germany. Both should be interesting reading.
Steve.
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