Most of the information needed for safe driving is gathered visually - fog severely limits the visual information available. This is why it is estimated statistically to be the most dangerous weather to drive in.

Fog not only takes away visual information, it also distorts what can be seen, making it difficult to assess speed and distance.

The best advice is to avoid driving in fog whenever possible, if you can't avoid it, follow the guidelines on these pages.

The information about fog is indexed below.

Click on the topic that you want to learn more about or follow the navigation arrows at the bottom of the page to browse sequentially..

	What causes fog?
	Lights in daytime fog
	Front fog lights
	Rear fog lights
	Keeping a safe distance
	General fog driving advice