Since roughly the 1950s, all government-issued stop signs in the United States have been red. But you might be surprised to learn that for the 30 years prior, yellow stop signs were prevalent.

Stop signs are self-explanatory - they spell out what you’re supposed to do when you encounter one. In practice, drivers are not always following the letter of the law. NBC Connecticut ...

In the United States, it requires an act of Congress to ... In Nebraska, it may take an act of the Legislature to erect a pair of stop signs outside the Capitol. Two years after a state lawmaker ...

But while it’s rare, you might come across a blue stop sign, either on a United States roadway or abroad. What does a blue stop sign mean, and where might you see one? Are they used for purposes ...