First off, travel armed. Second, situational awareness / utilization of handheld CB and scanners. Defensive driving skills (plan a way of escape in all driving situations).
Your vehicle is also a weapon on four wheels and use it like a Sherman tank. Use it with extreme prejudice against any sudden assault or attack.
Attack, escape, report, repeat.
RUN THEM OVER.
Your defense, “I WAS IN FEAR FOR MY LIFE” (and/or others in the car)
After that STFU.
NEVER stray from that!
You can use lethal force to defend your life and the lives of others.