Very disturbing indeed and what a lot of personal grief and life changes for the railway employees and their families as well as the shock to those involved in the original incident.
Interestingly in the current edition of
Today's Railways Europe (Issue 264 December 2017) the new
CEO▸ of SNCB (Belgian National Railways) Sophie Dutordoir is reported as saying
...she is shocked by the high number of industrial accidents - four times higher than in similar enterprises
The rest of that news item is interesting if you want to see just how we compare to at least one other European system which seems to have many similar (and some worse) issues despite being dominated by a nationalised rail company.