through the foothills of the Bavarian Forest. Outside of Passau, the route turns south, passes through the Neuburg Forest and crosses the Inn, the border between Germany and Austria. A 3 continues on the Austrian side is the Innkreisautobahn A 8, which continues to Linz. History The first plans for the northern section between Emmerich and Oberhausen, the so-called "Holland line" (Reichsautobahnstrecke 92), date to the year 1936. Despite difficulties in the route definition (industrial areas in Oberhausen and Dinslaken are crossed) was already in July 1939 with the construction to be started. Because of the Second World War, the construction work had to be stopped in October of the same year until July 1940. . Up to about a third of the earthworks were completed. The route was already cleared and construction had started on 29 buildings The first plans for the Cologne-Düsseldorf route go back to 1925. In 1929 the Provincial Association of the Prussian Rhine Province legally established the route between Cologne-Düsseldorf and in 1931 the construction started of a 2.5-kilometer section at Opladen. I was opened on 27 September 1933 and shortened the section of trunk road 8 between the two cities. The southern part of this route was not further upgraded and included in a simple bypass, now part of the B 8 / L 288 (Bonner road). In the years up to 1940, the rest of the Reichsautobahn Oberhausen (following the A 2) was built over Cologne to Wiesbaden sections. The 25-kilometer section from Cologne-Mülheim to Mettmann was opened on May 21, 1936 to traffic. In the same year, the section from Breitscheid to Oberhausen-Lirich / Duisburg-Meiderich was completed in the northerly direction. In 1937, the northern continuation of the current motorway junction Oberhausen and the gap closure between Mettmann and Breitscheid followed. The southern route allowed the direction Reichsautobahnen simultaneously from both Cologne in the south and Wiesbaden in the north. The section between the interchange Köln-Mülheim and Siegburg 30 km in length was handed over on December 17, 1937 after about three years of construction time traffic. One year later, on 15 December 1938, the 12 km section was taken to the junction Siebengebirge and on 20 September 1939 followed by another 30 km to Dierdorf. The southern section with 48 km length between the former junction Wiesbaden, today's Wiesbadener Kreuz, and the junction Limburg-Nord was opened on 23 September 1939 traffic.