In high-speed, high-volume areas, what is the minimum height for traffic cones?

Answer: B — 28 inches

In high-speed, high-volume areas, the minimum height requirement for traffic cones is established to ensure they are easily visible to drivers. A height of 28 inches is optimal because it helps grab the attention of motorists who may be traveling at higher speeds. Taller cones are more likely to be seen from a distance, allowing drivers to react appropriately and adjust their speed as needed well ahead of the work zone. Additionally, the visibility of these cones plays a critical role in maintaining safety for both the drivers and the workers present in the construction zone. Adequate height can minimize the risk of vehicles inadvertently crossing into restricted areas or the work zone, thereby preventing accidents. This standard is part of the guidelines for effective temporary traffic control to manage the flow of vehicle traffic safely.