Fog forms when atmospheric water vapor condenses into airborne droplets, typically occurring when humidity rises, and temperature drops in the morning or evening. This phenomenon can reduce visibility, posing risks to transportation. Fog lamps positioned lower than standard headlights, help illuminate the road ahead during foggy or wet conditions. Human vision sensitivity ranges from 1 to 100,000 lux, affecting visibility in varying light intensities. To assess fog lamp effectiveness in supporting ADHL, this study develops a prototype that functions in both normal and extreme weather while simulating illumination coverage under dense fog. The fog lamps utilize two-color LED technology–white in clear conditions and yellow in poor weather–for optimal visibility. Findings indicate that the prototype performs well in fog less than 2 meters thick. However, in denser fog, visibility is nearly zero, making it impossible for drivers to see the road.
