Guess I didn't describe this well enough. I'll try again, simply for the record. It replaces simple noise making rumble strips with alarm sounds, something that's most definitely never been done before.
Scary or ominous chord or alarm playing rumble strips, either permanent or in sheets laid down
Musical rumble strips have been around for a while, but they've never been used like this. There are musical rumble strips, and warning rumble strips but none that play clearly discernible alarm sounds. You just hear a roar or a pretty song. This solves that issue. You don't just hear a roar like you're going through a bad patch of road, you hear a classic alarm being played using your tires.
So the idea is to warn drivers of an upcoming dangerous stretch of road, say a curvy mountainous un-divided road coming up. Options might be:
1- One note on the left tire, one on the right cycling through notes on a spooky minor chord.
2- A simple alarm sound consisting of two dissonant notes going on and off.
3- My favorite, the Star Trek bridge alarm rising repeatedly.
I'd suggest these all fade in so you don't shock the driver which wouldn't be good.
You migh also play a pleasant major chord when the dangerous stretch of road's been passed.
Also, as far as I know the temporary portable rumble strip thing hasn't been done. This would be great for construction zones.