A lorry without front fog lamps travels in fog that significantly reduces visibility but is not dense and does not require rear fog lamps. With no main beam in use, which lights must it have on?

Correct answer

The sidelights and dipped-beam headlights, at least.

Use position lights and dipped headlights. Position lights alone are insufficient. Article 106 permits front fog lamps or dipped or main beam in the conditions it specifies; the question excludes front fog lamps and main beam. Rear fog lamps are reserved for particularly adverse conditions, such as dense fog, rather than every visibility reduction. Avoid dazzling and adapt speed and following distance.