This is a great idea. Every once in a while, I want to say "I'm sorry" to someone in another car, and I'm not sure how. Currently, I wave and grimace, but I'm n

This is a great idea. Every once in a while, I want to say "I'm sorry" to someone in another car, and I'm not sure how. Currently, I wave and grimace, but I'm not sure that gets the message across. I wonder what it would take for something like this to spread across the globe as the standard way to say "I'm sorry" to someone in another vehicle.