living in the city enviroment I just said to myself, "**** yall, I dare you, NO I DOUBLE DARE YOU MOTHER****ER. RAM ME RIGHT NOW BECAUSE DADDY NEEDS A NEW CAR!" (then i turn my music up to zone out those around me) and if they pass I make sure nothing is in front of me for a long time and give them the nastiest look ever. You think you can look at me nasty I'll give you something to speed up about... *****!
works everytime

sometimes i swerve left and right to pretend like I"m drunk and then they'll give me all the car space I want
cops pull me over? i wasn't drinking sir, give me a test!
seriously you want agressiveness? this is the next generation of aggressiveness.... except I'm just saving fuel in the process