The Bundesautobahn 7 starts at
Flensburg and travels through the two states at
Schleswig and
Rendsburg, through the world's busiest artificial waterway of
Kiel Canal crossing the Rader high bridge. At Rendsburg you can change to the A 210, a feeder to the Schleswig-Holstein capital, Kiel. A few kilometers further south there is another feeder route to Kiel, the A 215, into the A7 at the interchange Bordesholm; however, this can only be reached from the south, likewise from the A 215 you can only reach the A7 in the south. South of Bordesholm, the highway has been continuously expanded to six lanes since 2014 due to the high traffic volume to Hamburg. Since 2016 and 2017, several sections have six lanes. Here, the motorway leads past the cities of Neumünster, Bad Bramstedt and Norderstedt, before the hamlet of Schnelsen reaches Hamburg's urban area, and also
Hamburg Airport. From the intersection Hamburg-Nordwest, where the A23 branches off towards Heide, the A7 is six lanes, but is currently being expanded to eight lanes. The section through the city of
Hamburg is characterized by an immense volume of traffic, congestion is the order of the day here. There are several reasons for this: the motorway runs through inner-city areas, there is a lot of holiday traffic on the route during school holidays, there are practically no opportunities for bypassing, the speed is permanently limited to 80 km / h as an urban area and the section is extended, South of the equipped with four tubes to two lanes Elbe tunnel leads the A7 on the highway Elbmarsch, the longest road bridge in Germany, right through the harbor area and the Harburg mountains to Lower Saxony. Via the corner junction A 261 you get to the A 1 to Bremen, at the following Maschener Kreuz on the A 39 to Lüneburg. Going through
Hanover from Hamburg, the highway has six lanes, and it was downgraded to the four-lane section between Soltau and Walsrode the hard shoulder can be temporarily released as a third lane. It leads across the Lüneburg Heath, partly with separate directional lanes. At the triangle Walsrode you reach the A 27 to Bremen and a few kilometers to the south, before reaching the capital of Lower Saxony, at the junction Hannover-Nord on the A 352, which connects to
Hannover Airport and ends at the A 2, which leads to Dortmund. The following motorway junctions of the A7 provide a connection to the A37 Hanover city center and to Celle or A 2 Ruhrgebiet-Berlin dar. By the Altwarmbüchener Moor the highway leads east to Hanover; at the triangle Hannover-Süd, where the southern branch of the A 37 to the fair Hanover is connected only with the further south part of the A7. South of
Hildesheim, the A7 enters a
low mountain range and the terrain becomes hilly. The Salzgitter triangle also connects only the southern part of the A7 with the A 39 to
Braunschweig and Salzgitter. Between the triangle Salzgitter and
Göttingen the highway is expands to six lanes. Passing the university town, the A 38 branches off at Dreieck Drammetal to
Leipzig, then the A7 leads over steep gradients and slopes down into the Werratal near the town of
Hann. Münden and continues onto
Hesse. At
Kassel, it is the largest district, from there you can get on the A44 in the direction of the west to the Ruhr area and in some years, when the extension Kassel-Herleshausen will be completed, also in the direction of Eisenach. Between the interchange Kassel-Ost and the interchange Kassel-Süd, the A7 is being developed eight-lane for a future convergence with the then branching off to the east A44. In Kassel, the unfinished A 49 branches off, which will lead from completed completion to the Ohmtal triangle, which is to be built near Homberg (Ohm) between the junctions Alsfeld-West and Homberg (Ohm) on the A5. Between Kassel and Kirchheim the Knüllgebirge is crossed. The Kirchheim triangle and the Hattenbacher triangle, which are close to each other and quite close to the geographic center of Germany, together form one of the most important motorway junctions of the state. The A 4 leads to the New Länder and Eastern Europe, the A 5 to the Rhine-Main area and on to the border of Switzerland. South of the Hattenbacher triangle is the A7 sections four-lane expanded, leads past Fulda, where the A 66 branches off to Hanau and reaches Bavarian territory. Crossing the
Rhön Mountains, pass Schweinfurt (cross with the A 70 to Bayreuth) and Würzburg to the Biebelried intersection, where the A 3 Ruhrgebiet-Frankfurt am Main-Nürnberg-Passau is crossed. This was the southern end of the A7 for a long time. The completion of the south in the 1980s leads past Rothenburg ob der Tauber on the western edge of the Frankenhöhe to the freeway junction Feuchtwangen / Crailsheim (intersection with the A 6 Saarbrücken-Heilbronn-Nuremberg- Waidhaus) and partly Baden-Württemberg area over the Ostalb, for the crossing even two tunnels had to be built, via Aalen to Ulm. At the motorway junction Ulm / Elchingen, the A8 (Luxembourg-Karlsruhe-Stuttgart-Munich-Salzburg) is crossed. South of Ulm it goes through the Illertal parallel to the river back to Bavaria, via Memmingen (cross with the A 96 Lindau Munich) and Kempten (branch to the A 980 to Oberstdorf), over the 2009 completed section through the Reinertshoftunnel to the edge of the foot of the Alps. There, the lane becomes one lane and flows into the border tunnel Füssen to Austria. == History ==