Have you ever been stuck behind a car with its right turn signal on at a red light, and that driver just sits there? And it’s not like there’s a sign saying ‘No Right Turn on Red.’ Of course, you have ...

Heck, even a toddler can tell you that stop signs are red. That’s because since the 1950s, red has been the required background color for all government-regulated stop signs in the United States. But ...