> Or how about we just use a recording of engine sounds? People know what it means already, and it won't induce migranes in busy cities.
>

Depends on the engine recorded. I've heard some that *would* give people migraines.

Seriously, I think this is the most likely and practical idea, just as long as the sounds are quieter than they are now. They should really only be audible for a relatively small radius around the car, since that's the only place people *need* to hear them.

La"Think how much more peaceful LA would be! OK, maybe not"Zorra