Revision question · The road

When is the visibility generally seriously reduced enough to permit rear fog lights?

Revision material from the imported DVSA bank includes source-checked Lanekind learning corrections. These corrections are not newly issued official examination questions, and practice does not reproduce a live test paper.

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When visibility is more than 100 metres (328 feet)

Only when the national speed limit applies

Only when you're being followed closely by other traffic

When you cannot see for more than about 100 metres (328 feet)

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When you cannot see for more than about 100 metres (328 feet)This was the right answer

Use headlights when visibility is seriously reduced, generally when you cannot see for more than about 100 metres. Fog lights may also be used, but must be switched off as visibility improves to avoid dazzling others or obscuring brake lights.

Reviewed reading for this question

Rule 226Highway Code rule · The approximately 100-metre guide is not an unconditional exact switch point or permission to keep dazzling fog lights on after visibility improves.Rule 236Highway Code rule · The approximately 100-metre guide is not an unconditional exact switch point or permission to keep dazzling fog lights on after visibility improves.

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