At some point, most of us have been driving along, approaching an intersection, and spotting a familiar sight—a stop sign. It’s red, octagonal, and instantly recognizable. But what if you came across one that was blue instead? Would you stop? Would you assume it was a mistake? Or would you start questioning everything you know about road signs?
Seeing a blue stop sign can be confusing because it goes against what we’re used to. Stop signs have been red for decades, so a different color immediately stands out. While blue
