In high speed work zones at night, what is the minimum height requirement for traffic cones?

The minimum height requirement for traffic cones in high-speed work zones at night is crucial for ensuring visibility and safety. The specified height of 28 inches is implemented because it aligns with standards set to ensure that the cones are easily recognizable by drivers, especially in low-light conditions.

A cone of this height is tall enough to be seen from a distance and helps create a visual barrier that alerts drivers to the work zone ahead. This is particularly important in high-speed areas where quick, clear visual cues can aid in accident prevention and overall road safety.

Using cones that meet this minimum height contributes to the effectiveness of traffic control measures, ensuring that drivers are adequately informed of changes in roadway conditions, even after dark. This standard is established based on research into how far away cones need to be visible to allow drivers time to react accordingly.