1970s style. The reason for the new station building was the danger that the old station building would collapse during the construction of the tunnel. The underground S-Bahn station was built with four tracks, which allows trains to be reversed. Since the construction of the City-S-Bahn, S-Bahn services between the Hauptbahnhof and Altona is split: lines S1, S2 and S3 now run through the tunnel and lines S11, S21 and S31 run on the old main line. Stations The original Altona station was built at the southern end of the Hamburg-Altona–Kiel line. Between 1893 and 1898 it was replaced with a new building 400 metres further north, as extending the old station was impossible due to the dense development. The former station was expanded with a new north wing, to become the new Altona Town Hall. The new Altona station (until 1938 known as Altona Hauptbahnhof) was opened in 1898. It initially had eight tracks, but after the construction of the suburban station it had ten tracks. The station building was originally built in Gothic Revival style; in 1979 it was rebuilt in a plain style, which was renovated in 2002. Holstenstraße station was opened in 1893 as a replacement for the former Schulterblatt station during the elevating of the line. It originally had platforms for both long-distance and suburban services, with a hall on each platform and a reception building. These were destroyed during World War II; only the S-Bahn building was rebuilt and this was replaced in 1990. The remains of the long-distance platform was demolished in 1970. Schulterblatt station was right on the border between the former cities of Hamburg and Altona. In 1893 was the station was closed and replaced by Holstenstraße station. Sternschanze station has been located at the present site since 1906 and is an S-Bahn only station now. The entrance building to the once magnificent station hall still exists. A station with the same name already existed from the opening of the line in 1866, the new one was created during the elevation of the line but further west. The former station building still exists north of the line. Dammtor station is the smallest long-distance station in Hamburg. In the mid-1980s, the station was beautifully restored building and is a heritage-listed building. Hamburg Hauptbahnhof was built in 1906 to the east of the city as a replacement for the three terminal stations on