Originally Posted by Ralph M:
Did end-of-train devices come into use before the elimination of the caboose?
Yes, on industrial railroads like mining railroads. [Correction: I had forgotten about FEC. David Johnston caught it. Thanks, David] Common carrier railroads began using them for testing before eliminating cabooses. However, these early ETD's only transmitted that brakes were applied or released. The detailed telemetry communication of brake pipe pressure, motion, marker light on/off, came later. That is when the railroads acted to remove cabooses. The ability for the Engineer to put the ETD into Emergency and apply emergency braking from the rear of the train came even later.
Didn't some cabooses carry them for a while?
Some did, while railroads were negotiating with the United Transportation union on each individual railroad, for removal of cabooses, placement of the rear-end crew on the head end, reduction in number of Trainmen, and compensation for these concessions.
Thanks