The national railway company, Deutsche Bahn, operates trains throughout Germany, including high-speed ICE trains. Many larger cities in Germany also have underground and suburban rail networks, known as the U-Bahn and S-Bahn, respectively. These provide efficient transport around the city and are a good option for getting to and from the airport.
Regional and long-distance buses are also available in Germany, with companies such as Flixbus and Eurolines providing services throughout the country and to neighboring countries.
Germany is, in general, bicycle friendly, with many bike lanes in cities. There is also a substantial network of well signed, long distance bike routes BICYCLE ROUTE PLANNER GERMANY + Germany – EuroVelo
Here are the websites of the transport systems for the top 20 cities in Germany: