Although they are relatively rare, several small roads in the United States have signs that regulate the speed limit down to ...

An example of what variable speed limit signs look like above a highway in Washington. Courtesy of the Washington State Department of Transportation When icy conditions led to a 133-car pileup on ...

Add Yahoo as a preferred source to see more of our stories on Google. A Wisconsin road has added a decimal point to its speed limit — in the hope that the unusual traffic sign will give drivers’ ...

Speed limits across Texas roads are about to get smarter. In an effort to make highways safer and more responsive to real-time conditions, state officials are beginning a wider rollout of variable ...