If you’ve ever driven on one of America’s many highways, you’ve certainly seen a speed limit sign before. But some of these highways also have another number under the posted speed limit, labeled ...

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 ...

BRYAN, Texas (KBTX) - The Texas Department of Transportation has implemented a reduced speed limit on Highway 6 due to the Big 6 project. On Sunday, Highway 6 was marked with new speed limit signs ...

If you're in a rush, you might feel tempted to ignore speed limits entirely. But there's a lot of thought that went into deciding those limits.

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 ...