Besides airline routes, a global positioning system (GPS) can compute a driving route from one location to another. An intersection is a vertex in this case, and a road connecting one intersection to...

Besides airline routes, a global positioning system (GPS) can compute a driving route from one location to another. An intersection is a vertex in this case, and a road connecting one intersection to another is an edge. Graph algorithms can determine the best route, where best can mean shortest traveling time, shortest distance (mileage), or fewest traffic hazards.