Alexander Kaczmarek revealed possible plan of expansion of the S-Bahn in Berlin: a third runway in Westend, a double track to Tegel and new lina S21, or an extension to Falkensee.
Any of these projects is possible and all of them ae very useful for the city, making transportation easier for passengers by reducing the number of changes to be made. Especially with regard to the new line S21, it will connect Wedding (Gesundbrunnen train station) to the City Centre (Potsdamer Platz), thus making the roadway between East and West even easier.
The work could extend until about the year 2025, but they would have a huge value for livability.
Picture S-Bhan Berlin.