Altona–Blankenese railway

Former station building in Klein Flottbek

The line begins at Altona station, where there is a four-track underground S-Bahn station, which has an attached reversing facility. The City S-Bahn line runs up a steep ramp (with a maximum gradient of 4.0%) to the surface and shortly later the Altona–Blankenese line branches off the line to Pinneberg and turns west. It passes through the stations of Bahrenfeld, Othmarschen, Klein Flottbek and Hochkamp and then runs into the three-track terminal station of Blankenese.

Like the line from Hamburg, the Blankenese-Wedel extension is connected to the eastern end of the station, so trains have to reverse out of the station to continue their journey. The line then runs to the stations of Iserbrook, Sülldorf, Rissen and finally, the terminus at Wedel. Unlike the section east of Blankenese, the extension to Wedel is mostly single track.

Multiple unit ElT1624, which was used on the Blankenese-Altona–Hauptbahnhof-Barmbek-Olsdorf line during the period of operation with catenary between 1927 and 1955

The line was opened on 19 May 1867 between Altona and Blankenese, although the only intermediate stations opened at that time were at Klein Flottbek and Bahrenfeld. The Othmarschen station was opened on 1 August 1882 with the development of the villa estate (German: Villenkolonien) of Othmarschen. Hochkamp station was built later.

On 1 December 1883, the extension was opened from Blankenese to Wedel. Extension of the line onwards from Blankenese station would have required a tunnel. Instead the station was built as a terminal station. Between 1911 and 1914 the Blankenese–Marienhöhe Trackless Railway (Gleislose Bahn Blankenese–Marienhöhe), an early trolleybus operation, ran from Blankenese station.

The Altona–Blankenese section, which had been duplicated by 1900, became part of the network of the Hamburg-Altona Urban and Suburban Railway (Hamburg-Altonaer Stadt- und Vorortbahn) on its establishment in 1906. In 1907 the line was electrified with overhead wires at 6.3 kV 25 Hz alternating current. It was the first electrified suburban railway in Germany. In 1934, the Urban and Suburban Railway was renamed the S-Bahn and converted to direct current operations, using side-contact third rail and a voltage of 1.2 kV. Because of Second World War, the conversion took place in two stage in 1940 and 1955. During this period, electrification was extended on the Blankenese line, initially, on 14 May 1950, from Blankenese to Sülldorf, with steam trains continuing to Wedel. A few months later, on 31 October 1950, Iserbrook station opened. On 20 May 1954, electrification was extended to Wedel.

The entire length of the line is now served by S-Bahn line S1. In addition S11 services operate from Altona to Blankenese during the peak hour. S1 trains are mainly operated with class 474 Electric multiple units, S11 are operated with class 472 EMUs.

• Janikowski, Andreas; Ott, Jörg (2002). Deutschlands S-Bahnen. Geschichte, Technik, Betriebe (in German). Stuttgart: transpress Verlag. ISBN 3-613-71195-8.
• "Als noch der Dampfzug von Blankenese nach Wedel fuhr". Das alte Sülldorf (in German). 2. Hamburg: Schröder. 1986. pp. 59–60.
• "100 jähriges Jubiläum der Eisenbahnlinie Blankenese-Wedel". Das alte Sülldorf (in German). 2. Hamburg: Schröder. 1986. pp. 61–62. (first partial publication in 1975)

• "List of stations on the S1" (in German). Retrieved 12 November 2010.