SMS said in rec.autos.driving:
It'd actually be nice if vehicles had a wider choice of sounds, just as
>they now have different levels of lights (parking, DRL, low beam, high
>beam, fog lights).
>
>A bell sound would be more appropriate for waking up someone that
>doesn't go when the light turns green, while the loud air horn would be
>appropriate when someone runs the red light in front of you.
And, of course, "Dixie" would play every time you were about to jump across a washed-out bridge or a big pile of dirt. :)