I remember how my dad once addressed a very similar situation, way back when.
He was driving the family (Mom, my younger brother, myself) to Pittsburgh one Saturday for our weekly visit with my dad’s parents–a forty-mile trip, more or less. Along one stretch of rural Pennsylvania road, some fellow in an intensely filthy mustard-yellow pickup truck apparently decided that my dad had cut him off somehow, or prevented him from passing, or trespassed on his mating territory, or who knows. Of course, since we had managed to throw off this guy’s schedule irrevocably, he decided that there was no other alternative but to follow us, screaming obscenities and swerving dangerously close to our car. This was back before the cellular revolution, so Dad simply kicked the car’s speed up a notch, trusting that Chuckles would eventually get bored and fade away. Instead, Chuckles interpreted this maneuver as an additional challenge to his manhood, and retaliated by attempting to run our car off the road.
At this point Dad changed tactics, and pulled over to the curb. Pickup Guy pulled over as well, several yards in front of us, and leaped out of the cab with a long metal object–yikes!–opps, false alarm, just a tire iron. So the guy, who looked like some sort of undernourished Dan Hagerty, dashed up to our car, still screaming unintelligibly, and took a swing at the driver’s side door.
The rest of the family, myself included, were completely petrified at this point. My dad was not a physically well man by any standards, having suffered from post-polio syndrome for his entire adult life, and though I loved and respected him dearly I harbored no illusions about how he would fare in a brawl. This, however, was never Dad’s intention. His entire goal by pulling over was merely to get Chuckles to step out of his own vehicle.
As the guy pulled the tire iron back for another swing at the car, Dad shifted into reverse and stepped on the gas, spraying gravel as our car leaped back about twenty yards. Then Dad, who among his other hobbies was an amateur drag racer, shifted back into drive, and slammed on the gas again. The car roared forward directly at the other guy, screeching to a halt at precisely nineteen yards. Chuckles screeched, tripped over his own feet and fell over backwards.
Dad shifted and backed the car up again ten yards. At this point Chuckles forgot all about both his manhood and his tire iron, leaped up and made a dash for his truck, and was out of sight in about fifteen seconds.
During all this, Dad had managed to also note down the license number of the other guy’s truck, and was able to get the police after his ass. I think Dad’s favorite part of the whole sordid affair was probably forcing the other guy to pay for an entirely new paint job, because of the dent he put in Dad’s car door.