Germany is known for its excellent public transportation system. It is very famous for its autobahn (motorway system) and has no direct speed limits. Lufthansa is Germany's largest national airline. Almost every major city in Germany has its own airport serving domestic and international flights. The largest airport is in Frankfurt. Frankfurt Airport is the third busiest airport in Europe. Bus transport in Germany is extensive, running along major railway lines and connecting major cities with locations where a train is not accessible. The main central bus stations are usually located in the city or at the city's main train station. Smaller bus servers typically have their own bus terminals. Driving is by far the best means of transportation for getting around a country, but if you don't have a car you can use popular carpooling. The average monetary percentage of each family spent on transportation is approximately 13%. There is a tram (Straßenbahn) in all medium to large cities, it sometimes runs underground and is quite expensive. The U-Bahn is ...