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Tunnels
Semmering Base Tunnel
The 27.3 km Semmering Base Tunnel links Gloggnitz and Mürzzuschlag beneath the Semmering Pass. It is under construction as part of the Vienna–Villach Southern Railway upgrade.
- Total length
- 27 km
- Open today
- 0 km
- Under construction
- 27 km
- Sections
- 1
Category
Tunnels
Status
Opened
Under construction
Tendered
Planned
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Sections
| Sections | Status | Length | Timeline | Cost | Funding | Contractors | Contract terms |
|---|---|---|---|---|---|---|---|
| Gloggnitz–Mürzzuschlag tunnel ÖBB reports that the final breakthrough in the Gloggnitz section took place on 29 November 2024. Technical tunnel equipment works began in summer 2025. The tunnel is scheduled to open at the end of 2029; ÖBB says the first trains will run in 2030. The mapped OSM tunnel line measures 27.1 km, close to the sourced 27.3 km. This lot records the full tunnel route; individual construction-contract scopes are not split because their route lengths are not stated on the project overview. | Under construction | 27 km |
| – | – | – | – |
Related projects
Sources
- ÖBB-Infrastruktur: Semmering Base Tunnelread Oct 10, 2026
- Wikipedia: Semmering-Basistunnelread Oct 10, 2026
- OpenStreetMap: Semmering Base Tunnel construction way 394410162read Oct 10, 2026
- ÖBB-Infrastruktur: Current Semmering Base Tunnel project updatesread Oct 13, 2026