What is the minimum height for traffic cones on nighttime or high-speed roads?

The minimum height for traffic cones used on nighttime or high-speed roads is established to ensure visibility and safety. A height of 28 inches is specifically designed to be more visible to drivers, especially at greater speeds and during low-light conditions. This height allows the cones to stand out effectively among the surrounding environment, ensuring that drivers can easily see and react to them from a distance, reducing the risk of accidents in construction or roadwork zones. Having a standardized height enhances uniformity in traffic control measures and helps maintain safety standards on highways.