Most of us have grown up recognizing the classic red octagonal stop sign as an unmistakable symbol of caution and order on the road. So, when a blue stop sign appears, it can be both puzzling and ...

In a world of confusing road signs, there’s one that’s never hard to figure out: STOP. Way before driver’s ed, we all knew the key details about its shape and what to do when you saw one. Heck, even a ...