New Bözberg Tunnel in canton Aargau enters service

The new 2,693-metre double-track tunnel between Effingen and Schinznach-Dorf (Canton of Aargau) replaces the original 1875 Bözberg tunnel and, as the largest single project of the 4-metre corridor, is key to carrying four-metre-high semi-trailers by rail on the Gotthard north-south axis. Construction began on 9 March 2016, the last track threshold was laid on 6 February 2020, and the tunnel entered service with the timetable change on 13 December 2020. Investment was around CHF 350 million; the old tunnel now serves as a service and rescue gallery.