[7dare]

In fact, the crash at the origin of this whol debacle was caused by a train being stopped on the tracks and being rear-ended by another.

[jnty]

That's an interesting way of looking at the cause and effect. Trains unexpectedly stopping in an expected and inevitable property of all networks, whereas trains exceeding their movement authority is not.

Stopping a train anywhere should therefore always be safe, so the safety failing is with the train behind, not the one in front.