A blue stop sign may look strange, but in the United States it is generally **not a standard public-road stop sign**. Official stop signs follow the MUTCD and are red with white lettering and an eight-sided shape, while blue versions may appear on private property such as parking areas, businesses, campuses or private communities for traffic control or decorative purposes. Since red is the established color for stopping, drivers should never assume a blue sign can simply be ignored—if you encounter one, the safest choice is to stop and follow the posted instructions and surrounding traffic controls.
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