What ever happened to the concept of following distance? The reason vehicles pile up is simple and never accidental. Anyone with a driver’s license is supposed to know this.
If you are a kid in the military you don’t need to have a state driver’s license. I was in a few dozen convoys. Little sleep. Lots of hangovers. Nonsense in loud vehicles.
I would also add that the kids driving are under constant pressure to keep up; to leave minimum distance to prevent the convoy from being broken. Civilian drivers cut in with little warning. There you are in a multi-fuel truck straining against a governor to keep up and a 20 year old chick in a Mustang cuts in ahead of the third truck ahead of you. Bingo.