A map isn't just for traveling - it can prevent your novel from becoming lost in inaccuracies.
Authors possess so many resources outside of a physical map. We can go to Map Quest to check the actual driving time between two points. Almost every point of interest boasts a website, full of information. Many famous destinations or routes are featured in books.
One of my favorite resources is Google Earth. Millions of satellite images have been pieced together to form a giant map of the world. One can zoom in on a particular city, right down to a city block or street corner. (Try this with your place of residence - it's almost eerie to see one's house from above!) Sections are updated every six to twelve months, so it's pretty accurate. Certain business categories can be pin-pointed on the map as well.
A good example of Google Earth use resides in a scene in Book II of my YA series. One of my characters walked from a restaurant back to Georgia Tech's campus. I used Google Earth to select the exact location of that restaurant, determine what street the character would take, and at what point would they pass a gas station near campus. I was able to provide accuracy with my directions and street names.
Have you ever used Google Earth in this manner?