So you know when you're following a car and someone like cuts you off or just makes it difficult for you to follow them in general (because they don't know)? Well we should invent like a beam of light that you can turn on when you are following a car. It would extend all the way to the bumper of the other car, kind of like a light rope. This way, all the other cars around you would be aware you were following them and would probably be more accommodating.