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When you think of a stop sign , the image that comes to mind is likely the classic red octagon — bold, unmistakable, and universally understood. It’s one of the most recognizable traffic control devices in the world, designed to bring vehicles to a complete stop and ensure road safety at intersections .
But what if you came across a stop sign that’s blue ?
You’d probably do a double-take — and maybe even wonder: Is this a mistake? A prank? Or is there a reason behind the color change?
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