that TV show a couple weeks ago showed just how important it is.
I think it was in Alberta, out there somewhere anyway, and it was about a horrible train wreck. There were three men on the train. An engineer, a feller riding in the cab with him and another in the caboose.
The Engineer was a bit of a drunk and had health problems. There was a foot switch on the floor that was a safety measure for if the Engineer had a heart attack or left his position for any reason unexpectedly, the breaks would be applied.
It seems that this switch was commonly over ridden by a brick or lunch box being put on it.
They are not sure what happened but a passenger train was a coming full tilt from the opposite direction and the freight was suppose to take a siding. They hit head on at a combined speed of a hundred miles per hour or so!
Engineer, the guy riding shotgun with him were killed instantly, as were many on the passenger train.
The guy in the rear of the freight said he kept calling the engineer but got no response.
There was an inquest and it was found that they all were sleeping and the dead mans switch was overridden.
Lots of dead people. Horrible crash.
I can see that if all the procedures were followed this would not have happened!