text: If it was a turn only lane and the green arrow was on, a friendly tap of the horn may have been okay, if he had been sitting there awhile.  But if it was one of those lanes where you can turn or go straight, and he didn't move cause he was going straight, then thats a different story.  And yes you can be cited for honking your horn within the city limits if you don't have a good reason to honk..I forget what it is called but it is a citeable offense.