Old Dog, New Tricks

If I were to ask you the color of a traffic Yield sign, in the United States, you, like most people that I've asked, might say YELLOW. In fact, if I told you that you were wrong, you would probably argue with me. I know because I did, as did others I chatted with. The reality is that they started out being Yellow in 1954 and remained that way for almost 20 years. In 1971, [...]