Back last century 
when they used cabooses, what did they do with them when their days work was done?
After a day on the road and they pull back into the yard, how long did the caboose/crew sit before the caboose was parked for the end of the shift, especially if cars they brought back into the yard had to be disconnected, stored, made up into an outgoing train? Were they left hanging out on some lonely piece of track until cars they brought in were taken care of, before the crew was truly finished with their work? Or was the priority to get them taken care of and off the time clock?
