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[quote user="samfp1943"] What Bucyrus, said (in Part): "...The kinks that I noticed in the video posted above by Tree68 are in the second curve after crossing this first trestle.  As the train runs around that curve, you can see the effects of those kinks as they cause the locomotive to skew to the right, and then suddenly swerve back hard to the left..." The start of the curve before the second bridge appears to have an artificially tightened curve ( possibly to decrease the radius to keep away from the retaining wall to the outside of the curve).  Possibly that contributed to the derailment? <div style="clear:both;"></div> [/quote] I see what you mean about that curve tightening as it approaches the second bridge.  However, the derailment happend on approach to the first bridge.  It is possible that the video does not at all reflect current operating practice or the track conditions at the time of the derailment.  In the video, it seems strange to slow down so much for the first trestle, which is straight, and then sail across the second trestle, through a curve that tightens as it meets the trestle, and then continues curving as it crosses the trestle.
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