A pink traffic sign may seem like a whimsical choice, but it’s actually trying to tell you something important As kids, we learn the basic rules of the road using three distinct colors: red ...

Knox County Engineering & Public Works produces and maintains more than 12,000 traffic signs to help driver navigate the roads. Here's a look at how they're made. Skip Navigation.

A thin film that reflects light in intriguing ways could be used to make road signs that shine brightly and change color at night, according to a study that will be published on Aug. 9 in Science ...