Edit: According to 1977
Chicago Incident, it is possible that IF 075/076 comes to the
slidings and couple with 033/034, parts of the train (12 car) will
be on a curve / turn, which might have chance to jackkniffed the
train and cause the derailment. Thanks to Dragonaxe for PM-ing this
details.
I know that Amercian incident was not coupling trains but
somehow the speed of it is too low and joins with 2 trains, hence
the similarity.
A derailment on a point only happens when there is no locking
mechanism.
The incident you've talked about is due to human error. I
believe the train infront got its brakes applied, and thus, when
the train at the back pushes it forward, it jackknifed it instead
of pushing it.
