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The engine will take longer to warm up
You'll be dazzled by other headlights
The brakes don't work as well
It's more difficult to see what's ahead
Explanation: You won't be able to see as far ahead in fog as you can on a clear day. You'll need to reduce your speed so that, if a hazard looms out of the fog, you have the time and space to take avoiding action. Travelling in fog is hazardous. If you can, try to delay your journey until it has cleared.
Category: Vehicle handling
References: The Official DVSA Guide to Driving: Section 6, Highway Code: Rule 234
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