Georgia DDS Practice Test

In heavy fog, using low-beam lights is the correct choice because they produce a light that is directed downward, which helps illuminate the road immediately in front of the vehicle without reflecting off the fog and creating a glare. High-beam lights can actually worsen visibility in foggy conditions, as the intense light reflects off the water droplets in the fog, creating a blinding effect that can obscure vision even further. Parking lights and emergency flashers are primarily intended for signaling to other vehicles rather than providing adequate illumination for safe driving, and relying solely on daytime running lights does not provide sufficient lighting for navigating through heavy fog. Therefore, low-beam headlights enhance visibility and safety when driving in fog.