What two sizes are required for reflective bands on cones used at night?

The correct answer is based on the standards that dictate the size of reflective bands used on traffic control devices, including cones, to ensure visibility during nighttime conditions. The required sizes for reflective bands on cones at night are 6 inches and 4 inches.

This specification is crucial for safety as it allows drivers to easily see the cones from a distance in low-light conditions, ensuring that work zones are clearly delineated and that motorists can navigate safely around them. The larger band size helps enhance visibility by reflecting light more effectively, thus reducing the potential for accidents in work zones.

Using adequate reflective band sizes is a key element in promoting safety in work zones, especially when visibility may be compromised. The chosen sizes have been determined through safety guidelines and practices to minimize risks associated with low-light driving situations.