While it may not be the case in every state, some states use an orange diamond on top of speed limit signs. Have you noticed it? Here's what they are for.

View of 45 MPH (radar enforced) speed limit sign on palm tree-lined street with cars passing by. - Sanfel/Getty Images As you make your way down the street or highway, you are likely — and hopefully ...

Drivers in the U.S. are very familiar with typical speed limits, from 25 mph in neighborhoods to 65 mph and above for interstates. While there are different sign types, including maximum and minimum ...

Texas doesn't have much in the way of laws (unless you're a woman) but the state does still have speed limits. Sometimes, while cruising through the lone star state, you'll even spot what looks like a ...

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. When icy conditions led to a 133-car pileup ...