If you ever wondered why the signs that you see on the highway, particularly green, here are some safety-based reasons you ...

Highway signs are a ubiquitous part of America's infrastructure iconography. The U.S. highway shields are probably the most well-known mass-produced piece of aluminum in the country. However, the ...

When you’re driving down the highway, you naturally pay attention to traffic signs. But do you ever think about why they look the way they do or why they’re a certain color? Take the green ones. Green ...