[D] A44, Kassel-Dortmund

In 6:20 you may see the most interesting part of A44 "autobahn", the section Geseke-Büren, which was constructed as an Auxiliary runway for military aircraft.
This section is even and straight, without any constructions like bridges and the crash-barriers can be taken out. It was constructed to be a runway for US-military aircraft in a war with NATO's opponent, the Warsaw Pact. At both ends of the section there are parking lots for parking and maintenance of the aircraft.