@donkeypong, I never heard before how traffic signals or rode rules came around to the world. I know just now how was came to every states who attended to created first traffic rules William Phelps Eno. Absolutely his Reform in Our Street Traffic Urgently Needed essay could be important to created road rules I believe. Your mind very powerful coz you thinking different ways. That's really educational post for every peoples I recommend everyone need to read this.
Without make road signals and rules drivers cannot control always. Traffic police must need to take action if some driver break road rules. But some developing countries officers don't care who're break road rules. They try to take bribery from drivers. I saw many times it. William Phelps Eno did great task for make and control every countries traffic rules through his introduction. Thanks for the valuable post.