For cones used on freeways at night, what minimum height is required?

The requirement for the minimum height of cones used on freeways at night is set at 28 inches. This height is established to ensure that the cones are sufficiently visible to drivers in low-light conditions, particularly on high-speed roadways. The visibility of road safety devices is crucial in preventing accidents and guiding vehicles safely, especially during nighttime when lighting is limited. A cone that measures 28 inches provides an adequate height to catch the attention of drivers, thereby contributing to overall roadway safety.

While there are taller cones available, the 28-inch specification strikes a balance between visibility and practicality for use in these environments. Ensuring that safety equipment meets these height requirements is a key component of emergency vehicle safety initiatives, as it reinforces the need for proper roadside warnings and guidance during emergency situations or road work.