In Oregon, there are times when you may be required to use chains on snowy or icy roads.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/28364885@N02">Oregon Department of Transportation</a>
CC BY 2.0
<p><a rel="nofollow" class="external text" href="https://www.flickr.com/photos/oregondot/8117366809/">Chains required</a>
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<ul><li>Uploaded by <a href="//commons.wikimedia.org/wiki/User:Smallman12q" title="User:Smallman12q">Smallman12q</a></li></ul>