What Gets Featured on Blue Highway Signs?

The rules vary from state to state, but there are specific guidelines for what services can and can't get a mention on U.S. highway signs. Learn more in this episode of BrainStuff, based on this article: https://auto.howstuffworks.com/tech-transport/who-featured-blue-highway-exit-signs.htm Learn more about your ad-choices at https://www.iheartpodcastnetwork.com