The amber light used on modern traffic lights was not introduced until 1921 when inventor William Potts brought the three-colour traffic light to Detroit. This innovation added a yellow “caution ...

The tricolor electronic traffic light has existed since 1914, and the color scheme is used the world over. So get ready for every old-timer to absolutely lose it over the IEEE's latest idea ...

The paper’s authors say the light doesn’t need to be white and can be any color (we vote purple). The researchers tested this system using microscopic traffic simulators, which are complex ...