波兰走廊
After World War I the German "HaFraBa" association had already set up plans to build an "Autobahn" along the route from Berlin, through the Polish Corridor, to the Free City of Danzig and East Prussia (today informally known as Berlinka). The construction was pushed by the Nazi authorities after 1933 as an extraterritorial "Reichsautobahn" across the Polish Corridor of pre-World War II Poland further south than the modern S6 freeway has been planned for, however the road was never completed.