If you’ve ever spotted a blue stop sign, you’re not alone in doing a double take. We’re all used to the red, octagonal sign that screams “stop!”—so a blue one feels confusing and possibly even fake. While blue stop signs aren’t part of official U.S. road regulations, they do exist—mainly on private property, like gated neighborhoods, business lots, or industrial sites. They function the same way as a red stop sign but are not legally required by federal law.
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