Just ignore them and go about your way. I used be horrible and have really bad road rage, I think it's because I always let people go in any situation and I expect the same treatment ( I know I'm an idiot

) But one day a group of boys cut off an older man and the man chased them and gave them the finger well one of the boys took out a gun and shot him dead

I felt so awful. This man was dead cause of a stupid situation. I vowed that day to never ever have road rage again. If someone gives me the finger or worse I simply smile.
You just never know how people are or if you could be the straw that broke the camels back. I would just ignore them , a nice person will eventually come along and let you in. You sound like a nice person and Karma will come your way , soon.