Why must you also drive with dipped headlight during the day when visibility is impaired by fog, rain or falling snow?

In Germany, driving with dipped headlights during the day when visibility is reduced by fog, rain, or snow is required because it makes your vehicle more visible to other road users. Poor weather conditions can obscure vehicles, increasing the risk of accidents. Using dipped headlights improves your visibility to others, helping to prevent collisions. It does not increase your driving speed or extend the distance at which you can see traffic signs; its primary purpose is to enhance safety by signaling your presence clearly. This rule helps maintain safe traffic flow in adverse weather conditions.