Two additional S-Bahn tracks were built on the western route from the Hauptbahnhof towards Wunstorf as far as Seelze from 1994, with services starting in 1997. In Leinhausen an extensive flying junction was built; this separates regional and long distance traffic running to and from the north and west. The S-Bahn runs over the old freight tracks in Hainholz and through the former main freight yard. This included the new Hannover-Nordstadt S-Bahn station, which replaced the existing suburban station of Hannover-Hainholz.