Does that mean we’re stuck with white, yellow/amber, and red for the next 1000 years of human civilization? Laws are made for the needs of the society, not the other way around. As others have noted, there are already exceptions for motorcycles.
I guess I don't understand your comment, or why the current codes matter, if new data shows something like a trivial color change could save lives.
The purpose of pointing out the exception for motorcycles was that the laws have already been changed/ammended/whatever once. Surely it's possible that it happens again, say, with color.
