I don't know what became of it, but at one point there was a DARPA initiative to do just that for military convoys. The reasoning was that automated trucks woul

I don't know what became of it, but at one point there was a DARPA initiative to do just that for military convoys. The reasoning was that automated trucks would allow soldiers to treat the convoy as a "dumb herd" that would follow and be overseen by a squad of heavily armed and armored "sheepdogs". This would improve protection for soldiers, while simultaneously improving the efficiency of battlefield logistics.