View of the semmering portal at Gloggnitz.

Semmering Base Tunnel

It is one of the most important infrastructure projects in the heart of Europe. As part of the new Southern Line, the Semmering Base Tunnel creates a fast and safe connection between Lower Austria and Styria.

In under two hours by train from Vienna to Graz: The Semmering Base Tunnel makes it possible. From 2026, it will connect the town of Gloggnitz in Lower Austria with Mürzzuschlag in Styria. This will relieve the historic Semmering railway and get you to your destination even quicker. Freight services on this line will also become more attractive. Even heavy trains can pass through the tunnel, pulled by a locomotive.

Tunnel as a gateway to Europe

The Semmering Base Tunnel is a sustainable investment for the future of rail traffic. As part of the new Southern Line, it will strengthen the Baltic-Adriatic Corridor in Europe. This will ensure that our economy remains internationally competitive and allow the environment to breathe. Each tonne of freight moved by rail means around 15 times less CO2 emissions than transporting it by lorry.

Your benefits

    • Shorter journey times
    • Better connections to the south of Austria
    • Economic stimuli and jobs in the region
    • Relief of the Semmering mountain line
Crossway at the construction site Semmering Base Tunnel.

About the project

A total of 62 kilometres of tunnel are being excavated for the approximately 27 km-long railway tunnel. Find out what is currently happening at the construction sites.

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Webcams

Follow construction progress from home – our webcams on the construction sites of the Semmering Base Tunnel make that possible.

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Contact Us

We want to hear what you have to say. Feel free to contact us with any questions you may have about the project or our construction work.