Probably need some help here, but since there've been 4 or 5 incidents already this year in Dallas of road rage shootings. I start wondering at what point, if any, a vehicle becomes a "deadly weapon" and considered a threat to you life to the point you would use your gun. I'm not talking just a onetime swerve just in front of you and then the ole hit on the breaks. More of a continual "assault" where you slow down, change lanes, or other manuevering to "avoid" any confrontation. Consider moderate to heavy traffic on an expressway.