After an hour on the expressway, your passengers need to use the restroom and they want to get some food. As you approach the next exit, what color sign will you look for, and what type of information would you expect to see on that sign?
You would look for a blue sign that says food at the top and it would tell you how many miles to the left or to the right it will take to get to that restaurant, which will also include a bathroom, once you get off the expressway.
