Bike Touring Highlight
The Krohnstiegtunnel is a road tunnel in the course of the federal highway 433 and the ring 3 under the runway 15/33 of the Hamburg airport.By extending the airport runway over the border to Schleswig-Holstein in the 1960s, the Garstedter Weg, the connection from Niendorf to Garstedt, was cut. As a replacement, the Krohnstiegtunnel was built. In addition, the road connections in the north of Hamburg were improved. A new road, part of the Ring 3, from the junction "Schnelsen-Nord" on the A 7, was built to the tunnel, which was extended on the east side to Langenhorn.With the expansion of the airport from the 1990s and the construction of the bypass Fuhlsbüttel and the Krohnstiegtunnel was extended. North adjacent to the old road tunnel, a second open-tube was constructed between 1995 and 1998, leaving two lanes in each direction. The required demolition and reconstruction of the runway took place in just five months to minimize the impact on operations.The original Krohnstiegtunnel consists of a roughly 419 meters long and ten meters wide two-lane tube for road traffic and a south adjacent, six-meter-wide tube alone for pedestrians and cyclists, whose sole is slightly higher. The ramps on the sides have a length of 415 meters. With the completion of the second tube for road traffic in 1998, the tunnel received its present appearance.The tunnel is a closed reinforced concrete frame. It is located like the entire airport area, which belongs to Hamburg, in the district Fuhlsbüttel. The western portal, however, is located in Niendorf, the eastern in the area of the city Norderstedt.de.wikipedia.org/wiki/Krohnstiegtunnel
July 18, 2019
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