On March 30, 2023, the underground excavation for the tunnel of the “Große Wendlinger Kurve” started
Credit/Quelle: Jannik Walter/DB Projekt Stuttgart–Ulm
A second track was included in Stuttgart 21 as an option without structural provisions. Due to the expected benefits of a second track for rail traffic in the region, the Baden-Württemberg Ministry of Transport commissioned Deutsche Bahn to plan this addition to the Stuttgart–Ulm rail project and to build the second track known as the Große Wendlinger Kurve.
Running parallel to the Kleine Wendlinger Kurve, the second connecting curve will leave the Neckartalbahn at the outskirts of Oberboihingen and then pass under the new Wendlingen-Ulm line in a tunnel. From there, the line will continue in the direction of the airport.
Overview of the “Große Wendlinger Kurve” as part of the Stuttgart–Ulm rail project
Credit/Quelle: DB Projekt Stuttgart–Ulm
Including the above-ground section, the Große Wendlinger Kurve has a total length of around 1600 m. The mined tunnel will extend over 660 m, and the already completed cut-and-cover tunnel is 110 m long. The mined tunnel is being built by a joint venture of Ed. Züblin AG and the Max Bögl group of companies. The contract award for this tunnel project amounts to around
40 million euros. Commissioning of the Große Wendlinger Kurve is scheduled for December 2026.