If there was ever a need to have a firearms permit AND a weapon in the vehicle... this would be it.
No one should be on the road today without being prepared, anyone at anytime can snap and go after someone. Even Augusta (not a big city) had a road rage incident right on I-20. When you leave your house, you dont know whos path youll cross, but you also never know who the psycopath/sociopath out there is either. You need to be prepared for the fight thats out there.
Being ready for the fight doesnt mean that you have to fight... it means that you are ready to deal with the attacker and if you have to, take them on.