Revisiting this thread, because road rage is such a thing, now. I have been followed, twice, recently, by angry drivers, in vehicles which could easily outrun my V6 Tundra, so, “running away” was not an option. The plan, if one persists in following, is to calmly get off the road, and calmy park near solid cover, or, broken terrain that would favor The Prepared, but, then what? The G3 clone, perhaps with Spuhr furniture, is starting to look like a good idea, yet again.
Yes, of course, the Benelli, loaded with 12 gauge Tru-Ball Penetrators, is the answer, but, this is the Rifles and Carbines section of the forums.
Edited to add: Yes, I know, I would probably have to solve the problem with a big pistol, because I do not “keep” a long gun in the truck.