What reflective features are required for cones used at night?

The requirement for cones used at night to have two reflective bands, one measuring 6 inches and the other 4 inches, is based on safety standards designed to enhance visibility in low-light conditions. Reflective bands serve to increase the conspicuity of traffic cones, making them easily identifiable to drivers and reducing the risk of accidents in work zones or areas of construction.

The combination of a 6-inch band and a 4-inch band allows for better recognition at various distances and angles. This is particularly important because nighttime conditions can obscure visibility, and well-placed reflective materials provide critical guidance to motorists navigating through or around work zones.

Other options may not meet the safety standards stipulated in regulations or best practices for night-time operations, which emphasizes the importance of using cones that are appropriately marked for maximum visibility.