Hamburg-Altona link line
…serve not only the Hauptbahnhof, but also Altona station. The original purpose of the link line, the handling of freight traffic, is now served by the Hamburg freight bypass, running through the northern suburbs. Janikowski, Andreas; Jörg Ott (2002). Deutschlands S-Bahnen. Geschichte, Technik, Betriebe. (Germany's S-Bahns…