What must you do on encountering sudden dense fog driving at daytime?

In situations of sudden dense fog during daytime driving, it is crucial to take specific actions to ensure safety. According to German traffic regulations, drivers must adjust their speed to match the visibility conditions. This means slowing down significantly, as visibility can be severely limited in fog.

Additionally, switching on dipped headlights is necessary. This enhances your vehicle's visibility to others and helps you see the road better, as parking lights are insufficient for this scenario. The use of only parking lights is not appropriate in such conditions, as they do not provide adequate illumination for driving.

Hence, both adapting your speed and using dipped headlights are essential to maintain safety on the road during foggy conditions. By implementing these actions, you reduce the risk of accidents and ensure compliance with traffic laws.