Quote:
Originally Posted by WGroleau
Derailing sounds like a rather dangerous way to prevent access.
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Yes it absolutely is. There's a very real risk of injury or death to anyone on the train, particularly if the line speed is significant.
I was led to believe that you only derail a train if there's a risk of serious collision. Nowadays in the UK new installations are usually at depots (5 mph max) or freight lines, as TPWS should stop a train on the mainline before the point of collision.