All railway projects
Zimmerberg Base Tunnel II (Zürich–Baar–Zug)
Switzerland · Europe · Rail Upgrade
Planning VerifiedCapex: CHF 1.40B
Project overview
Zimmerberg Base Tunnel II (Zürich–Baar–Zug) — two single-track tunnel tubes connecting Thalwil and Zug, 10.8 km, in Zürich–Zug, Switzerland. 15 kV AC 16.7 Hz, ERTMS L2. Design contract awarded to Lombardi Group Jan 2025; construction expected to begin around 2029. Estimated cost CHF 1.2-1.4bn (early prognosis, +/-30%).
Type
Rail Upgrade
Country
Switzerland
Region
Europe
Status
approved
Investment
CHF 1.40B
Contractors & suppliers
- SBB Infrastructureclient_employer · project delivery