Washington subway crash

[tw]

Originally Posted by xoxoxoBruce

glatt did an excellent job of figuring out why the operator of that train couldn't possibly stop in time under manual control.

Was never able to discover when the train fully braked so aggressively as to blue rails. But why that braking did not continue in the second half of the stopping efforts. Did the train operator stop breaking or ease off the brakes during the second half of that deceleration? Could not find an answer for why rails suffered bluing and skid marks only in the first half; not in the second half.