Normalization of deviance,
https://hn.algolia.com/?query=normalization%20deviance&type=...
Humans never learn.
Also lots of potentially angry passengers who want to get to their destination in time. Will miss important appointments, or even the last train connection for the day and be stranded if the train drivers decide to wait a little bit longer to be on the save side.
Negligence is not limited to the single human who issued the order. it's pretty unlikely that their order could have caused this without a significant amount of other negligence that eroded the safeguards. Nevertheless, the negligence is human, not machine in nature.
> -Charlie Munger
Usually it's detrimental, hence (criminal) investigations of personal liability in such cases are often only allowed after systemic investigation has concluded.
In court, you are allowed to withhold information that makes you look bad, which is simply lethally unhelpful when we want safer trains.
There are not that many people who (care to) see the big picture(s) and the consequences their semi-small actions may have in the long run.