Road Weather Management Program
photos of lightning, trucks plowing snow, an empty road before a storm, and an evacuation
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Low Visibility

An image showing snow blowing accross the road.

Visibility distance is reduced by fog and heavy precipitation, as well as wind-blown snow, dust and smoke. Low visibility conditions cause increased speed variance, which increases crash risk. Each year, over 38,700 vehicle crashes occur in fog. Over 600 people are killed and more than 16,300 people are injured in these crashes annually.


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