from where the trains would use the existing tracks with overhead lines. As of November 2019, those plans are already approved, with the construction of the line scheduled for 2020. Route and Stations The route will be removed from the existing network at the Hasselbrook S and regional train stop and along the Lübeck – Hamburg route via Rahlstedt to Ahrensburg and Bad Oldesloe run. The route corresponds to the course of the regional train line RB81, which between 1966 and 2002 was already tariffed as an S-Bahn to Ahrensburg and operated under the name S4, but served by locomotive-hauled push-pull trains. For the expansion of the line, a double-track S-Bahn line will be created between Hasselbrook and Ahrensburg , and a single-track S-Bahn line to Gartenholz , then the S-Bahn trains will switch to the long-distance network and cross over this Bad Oldesloe . The new line has a length of around , the total length of the route between Hasselbrook and Bad Oldesloe is . The route is planning divided into the four sections `` Hasselbrook - Luetkensallee , `` Luetkensallee - state border Hamburg / Schleswig-Holstein , `` state border - garden wood and `` garden wood - Bad Oldesloe . The first three are also the sections that have been or will be individually plan approval. No separate approval procedure is required for the fourth section, as no construction work is planned for it. 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