Add Yahoo as a preferred source to see more of our stories on Google. An example of what variable speed limit signs look like above a highway in Washington. (Courtesy of the Washington State ...

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 ...

DENVER (KDVR) — The speed limit on Interstate 70 in the high country will now change based on driving conditions, thanks to newly installed electronic signage. The signs have LED lights that allow the ...

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 ...