For daytime and low-speed roadways, what is the minimum height for cones?

The minimum height for cones used during daytime and on low-speed roadways is indeed specified to be 18 inches. This height is essential for ensuring that the cones are visible to drivers, allowing for effective traffic management and safety during emergencies or roadworks. An 18-inch cone strikes a balance between visibility and practicality, making it easy to transport and set up while still providing adequate notice to oncoming vehicles, especially in environments where speed is reduced.

Cones of this height are easily noticed by drivers, which is crucial for preventing accidents and ensuring that drivers have sufficient time to respond to changes in traffic patterns. In contrast, cones that are significantly shorter may not capture the attention of drivers, especially in conditions where visibility is compromised. Therefore, using 18-inch cones meets the safety standards required for effective traffic control under the specified conditions.