Correct answer
It is not advisable because reflection can worsen visibility.
It is not advisable: light can reflect from fog and worsen visibility. Use appropriate lighting and adapt speed. Article 106 permits the specified combinations of front fog lamps, dipped beam or main beam where the latter is legal and does not dazzle; front fog lamps need not always be accompanied by dipped beam. Rear fog lighting is appropriate in thick fog and other particularly adverse conditions; it is not prohibited in every kind of fog.
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Yes, they are always mandatory in any fog.
It is not advisable because reflection can worsen visibility.
Yes, they guarantee poor visibility disappears.
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