Correct answer
Yes, the front fog light or the dipped-beam or main-beam headlamps.
According to Article 106 of the General Traffic Regulations, when a cloud of smoke significantly reduces visibility, it is compulsory to use lighting. In that case, the front fog light or the dipped-beam or main-beam headlamps may be used; the front fog light may be used alone or together with the dipped-beam headlamps, or even with the main-beam headlamps.
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Only when vehicles approach from the opposite direction.
No, except between sunset and sunrise.
Yes, the front fog light or the dipped-beam or main-beam headlamps.
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