Originally Posted by Glenn Fresch:
So I take it the derail is linked to the operation of the interlocking switches and signals.
BTW, this looks like its along the Northeast Corridor. What's the location?
A crew member could also be in control of the switch. Entering the main track the switch would have to be lined to remove the derail. Leaving the main line the switch couldn't be lined back until the train cleared the derail. No short cuts here and many crew members have derailed their own train trying to make a fast move. How would I know that!