Anyone Else Fascinated By Old Locomotives?

Before the Spiral tunnels in the Rockies ........took 3 - 4 locomotives because of the steep 4.5% grade. Twice the steepest recommended slope for descending traffic. This was one of the steepest adhesion lines anywhere. In the picture to the right is an escape track for runaway trains.

View attachment 93381
So if the train was going downhill at runaway speed, who gets picked to run ahead and operate the switch?
 
Really good photo and question about the switch and its operation. There was a switch called a speed switch but just how it worked is not explained. Wonder if there was a method of operating the switch manually from inside the loco. If they ran these routes all the time perhaps the locos were fitted with some type of device that would force the switch to the siding.
 


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