Why Are Roads Painted in 3 Colors? China’s road crews use three paint colors—yellow, blue, and red—to test road-marking machines for accuracy, spacing, and precision before applying official traffic lines. This ensures safer roads, higher visibility, and long-lasting markings. A smart engineering approach that boosts traffic safety and infrastructure quality. Credits: @ ada_toproadtraffic_ / TT #RoadSafety #EngineeringTech #SmartInfrastructure #technology #tech | Drive Mac
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