Which color is recommended for flaggers to enhance their visibility?

Answer: B — Bright orange

Bright orange is the recommended color for flaggers to enhance their visibility in work zones. This color is highly recognizable and contrasts well with the natural surroundings and typical road conditions. The use of bright orange is standardized because it stands out against both daylight and dusk conditions, making it easier for drivers and pedestrians to see flaggers from a distance. This visibility is crucial to ensure their safety and to effectively communicate messages regarding road conditions and traffic direction. The effectiveness of bright orange is supported by research and best practices in traffic control, confirming that it significantly reduces the risk of accidents involving flaggers. In contrast, other colors such as bright blue, dark green, and bright red do not have the same level of visibility or are often associated with different meanings in traffic signaling, which could lead to confusion among drivers.