By the mid/late '90s they were pretty well gone. The end of train device you see on the back of the last car spelled their end, along with the jobs that went with them.I may have written this before, but I'm not going to comb 300+ pages to find out. I don't remember when I last saw a train towing a caboose. They were still common in the '60s, but I don't know when they disappeared.