In 1937, planning for the motorway section from Nuremberg via Regensburg to Passau was begun. In the area between Nuremberg and Oberpfraundorf, however, a different route was chosen than the later built. The original route led over the area of the enlarged military training area Hohenfels after the Second World War. Also, in contrast to today running south of the city A 3 Deggendorf north should be bypassed. After 1939 already in some sections on the Franconian Alb and Wörth on the Danube and Deggendorf with earthworks and bridge construction work was started, they stopped the work, as on the northern section, 1942 due to the war. In the course of this work, the construction of a Danube bridge near Regensburg was started.