The "lesser known" end of the railroad.. For the first time in over a year, the string of autorack cars stored on the Bluestone Branch near Coopers, WV has an End of Train device attached, the successor to the infamous caboose of the 20th Century. Powered by air and transmitting the same pressure back to the head end, these nifty little devices often get overlooked until they are flashing away at the end of the train on a dark night.