 After the war, the interrupted construction works on the third section to Eugendorf were finished, nevertheless, the further continuation could not be resumed under Allied occupation.Between 1947 and 1965 the completed sections northwest of Salzburg were used as a racing track, known as "Little AVUS", the site of an annual motorcycle race, later called "Grand Prix of Austria", with racer Helmut Krackowizer among the first winners.The construction of the A1 continued upon the signing of the Austrian State Treaty in 1955.