When used on freeways or high-speed roads, what is the required height for cones?

The required height for cones used on freeways or high-speed roads is 28 inches. This height is specified to ensure that the cones are visible to drivers at greater distances and speeds, which is crucial for maintaining safety in work zones. The larger size helps to capture the attention of motorists and makes it easier for them to identify the work zone ahead, allowing them to react appropriately.

In high-speed environments, visibility is paramount, and a 28-inch cone height provides a balance between being noticeable and manageable for placement. This standard height reduces the risk of accidents and promotes better navigation through construction areas, enhancing overall road safety for both workers and drivers.