In the Hamburg area, the four new stops " Wandsbek Rathaus ", " Bovestraße ", " Holstenhofweg " and " Am Pulverhof " are being built, the existing regional train station " Wandsbek " will be replaced by " Wandsbek Rathaus " and " Bovestrasse " replaced. In Schleswig-Holstein, the establishment of an additional stopping point near the existing U-Bahn station "Ahrensburg West" is planned. The platforms of the existing stations will be adjusted in height and length for S-Bahn operations; In " Tonndorf ", " Ahrensburg ", " Kupfermühle " and " Bad Oldesloe " the existing systems can be raised to the height of 96 cm customary in the S-Bahn network, in " Rahlstedt ", " Gartenholz " and " Bargteheide " this requires a completely new building. In the first step, all platforms will be built with a length of at least 140 m, a later expansion to serve the route with long trains was taken into account in the planning. Furthermore, the existing level crossings with other types of traffic along the Route eliminated. For nature conservation reasons, complex structures are sometimes required, such as a wide-span new bridge in the nature reserve "Stellmoor-Ahrensburger Tunneltal", which in the context of the planning process leads to delays and More costs resulted.