What is the minimum size for traffic cones used at emergency scenes?

The minimum size for traffic cones used at emergency scenes is established to ensure that they are visible and effective in guiding traffic safely around an incident. Cones that are at least 28 inches in height provide a significant level of visibility when placed on the roadway. Their size allows them to be seen from a distance, helping to alert drivers to the presence of emergency responders and any potential hazards in the area. This visibility is crucial in emergency situations where quick notification to approaching vehicles is necessary to maintain safety for both the responders and the public.

Using cones smaller than 28 inches may reduce their visibility, especially in adverse weather conditions or at night, making them less effective in directing traffic and ensuring a safe environment. Thus, the choice of 28 inches as the minimum height reflects a balance between visibility and practicality in emergency scenes.