A consistent set of traffic rules is a mathematical problem. Mathematics emerges from the laws of nature. Traffic rules are a prime example of what would go totally wrong if you tried to solve it with typical man-made laws. Instead of giving priority to traffic coming from the right, we would end up giving priority to traffic of the members of the elite instead. In fact, that is what happens in many countries. Furthermore, in case of a traffic accident they always find man-made "legal" reasons why the elite is right and everybody else is wrong.