| Western entrance | |
| Overview | |
|---|---|
| Line | Koralmbahn |
| Location | Styria/Carinthia (Austria) |
| Status | under construction |
| Start | Frauental |
| End | Sankt Andrä |
| Operation | |
| Work begun | 2008 |
| Opened | ~2022 |
| Traffic | railway |
| Technical | |
| Length | 32.9 km |
| No. of tracks | 2 single track tubes |
The Koralm Tunnel is a railway tunnel under construction in Austria under the Koralpe mountain range. It will be 32,9 km long and up to 1.250 m deep and be a part of the 130 km Koralmbahn linking Graz with Klagenfurt. The tunnel will be composed by two single track tubes linked every 500 metres. There will be an emergency stop in the middle of the tunnel. The tunnel is expected to be operational by 2022.