What is the minimum height for temporary traffic signs to ensure visibility?

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The minimum height for temporary traffic signs is established to ensure that they are visible to drivers, particularly in varying conditions such as vehicle types, weather patterns, and roadway environments. When signs are positioned at 5 feet above the ground, it strikes a balance that provides adequate visibility for most vehicles, including larger ones like trucks and buses, while also being visible to drivers of standard passenger vehicles. This height helps minimize the risk of obstructions, whether from natural elements or other roadside structures, thereby enhancing safety and effective communication of vital traffic information.

While other height options may seem reasonable, they fail to meet the visibility needs across the diverse range of vehicles on the road. For instance, heights lower than 5 feet might hinder visibility for drivers in larger vehicles or in situations where visibility is compromised, like during poor weather. Therefore, establishing 5 feet as a minimum height for temporary traffic signs aligns with best practices for safety and accessibility on roadways.

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