The Japanese do that for their domestic market cars as they have no speed limit over 100km/h & don't want to encourage their customers to drive over this limit.
I did know of someone who could reprogram the controller becasue they still have a chip in them.
Dunno where you'd get this done though.
Next time you go for a highway drive, take a passenger & get them to try to figure out where the tinkle is coming from.
Maybe others on here know where the tinkler is & you could simply unplug it.