The contract includes the construction of southern bypass Nienburg after the development plan "no. 101 Südring" the city Nienburg / Weser and their connection to the Hannoversche Straße and the existing Südring including the new building of two bridges and the development of adjacent land access roads and the commercial area described in the development plan. In addition, a service road is created. The road neuzubauende transferred the railway line in 1741 (Minden - Nienburg / Weser) with an electrified railway Deutsche Bahn. The building is intended to cause a traffic-relief of the center of Nienburg / Weser. The new track alignment of Südring to connect in the Hannoversche Straße with its connection points at the main road 6 in the east to the Berliner Ring in the West. The street is located in the south of the town Nienburg / Weser. The construction project consists of several components and sections. The components mainly include the free series incl. Node, the bridge structure in the mode for carrying out a three-span prestressed concrete bridge over the railway tracks of Deutsche Bahn and the Bärenfall ditch, the bridge structure in the mode for carrying out a single field engined prestressed concrete bridge over the Steinhude Bach and a farm road. The award of the works carried out in batches. The following technical and partial lots were formed: Lot 1: Road Lot 2: bridge over the railway tracks Lot 3: bridge over the Steinhude Bach Lot 4: Economic Infrastructures Further earthworks and drainage measures (rainwater retention and retention basins) and a traffic signal are dependent on the construction progress announced in a separate procurement procedure and are not included in this process.