Originally Posted by Dromomaniac
...In some places - Bay Area comes to mind, as well as L.A. - you had better have the foot on the accelerator the moment the light turns green, or suffer The Horn....
One of the wonderfully odd customs in the part of Hawai`i where I live is that honking the horn is considered incredibly rude. It is to be done for situations of imminent danger. I have been at intersections where someone was inattentive to it being his/her turn to go and we waited right through the light cycle because it would have been rude to honk.
It's very, very nice after too many years in the Bay Area.
The last two times I heard a horn honk, I (and everyone else around me) looked: California plates both times.