Revision question · The road

When fog clears, which of these generally indicates that you should switch off the high-intensity 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.

Answer options

When visibility is more than 10 metres (32 feet)

When visibility is more than 50 metres (164 feet)

When visibility is more than 75 metres (246 feet)

When visibility is more than 100 metres (328 feet)

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When visibility is more than 100 metres (328 feet)This was the right answer

Switch off fog lights when visibility improves and is no longer seriously reduced. Being able to see more than about 100 metres is the Code’s general guide. Do not leave fog lights on merely because a trip began in fog.

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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