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Why should you always reduce your speed when travelling in fog?

The brakes don't work as well

You'll be dazzled by other headlights

The engine will take longer to warm up

It's more difficult to see what's ahead
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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 del