Leipzig City Tunnel
The 267th longest tunnel in the world
The City Tunnel is a twin-bore railway tunnel for the city-centre S-Bahn in Leipzig. It links Leipzig Hauptbahnhof with the central Markt station, Wilhelm-Leuschner-Platz station and Bayerischer Bahnhof. Construction began in July 2003. The first bore was structurally completed in March 2008, the second in October 2008. The tunnel and new tracks linking it with the rest of the network were opened for commercial service on 15 December 2013, the date of the timetable change in December 2013.
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).