Drivers that cut you off on the toll lane at the entrance of a bridge after you've been waiting in that lane for a while. Especially when the passenger riding shotgun waves their hand at you to "thank you" as they're cutting you off.

People that change lanes w/out signaling. Come on how hard is it to be a considerate safe driver and USE THE DAMN SIGNAL, A - HOLES [img]/images/graemlins/mad.gif[/img]