Im what context it is normal to derail a train to avoid a crash with another one?

More often than you think.

Especially when the train to be derailed is slow-moving or a freight train or runaway.

pxndxx 2 hours ago | parent | prev [-]

What course of action would you have suggested?

Not have to do it in the first place because of automated controls and fail-safes?

Sure, but in this case, those don't have exist and you need to make a tough choice, so which is it?

Not having fail-safes is the issue itself.

	▲	embedding-shape an hour ago \| parent [-]
		So smart, do you not understand the question? Don't answer if you can't, instead of trying to weasel. You're acting like the Spanish politicians now.