What is the minimum height for cones used for nighttime traffic control?

The minimum height for cones used for nighttime traffic control is indeed 42 inches. This height is established to ensure that the cones are visible to drivers in low-light conditions, reducing the risk of accidents and improving overall safety on the road. The taller cones are more easily seen from a distance, which is critical for guiding vehicles safely through construction zones or areas where traffic patterns are altered.

Visibility is a key factor in traffic control, especially at night when lower illumination levels may obscure smaller devices. Cones that meet or exceed this height standard are designed to effectively redirect or alert drivers, ensuring compliance with safety regulations and enhancing the overall effectiveness of Maintenance of Traffic measures.