Green highway signs, also called guide signs, are everywhere, and we pass them by without much thought. But their design has a big role in getting us where we need to go safely. Why are highway signs ...

(WHTM) — When driving on an interstate or any other major highway, you may see a sign directing you to a different city or another roadway. Most of these signs are green. But, what or who made that ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. (WHTM) — Now that you know why highway signs ...