PORR and Webuild Just Linked Italy and Austria 1,400 Metres Under the Alps. The German Line Feeding the Tunnel May Not Arrive Until 2050

More than 2.5 million trucks cross the Brenner Pass every year, roughly one every twelve seconds around the clock. The railway tunnel built to take them off that road is now about 90% excavated and due to open in early 2032. The German railway line that is supposed to feed it may not be finished until 2050.

A breakthrough 1,400 metres under the border

At 10:35 on 28 July 2026, miners linked the Austrian and Italian main bores of the Brenner Base Tunnel, 1,400 m below the surface close to the border, Railway Gazette International reported on 29 July. The 8.1 m diameter running tunnels join the Austrian H53 Pfons–Brenner section, driven by the ARGE H53 consortium of PORR and Marti using drill-and-blast, to the completed Italian H61 Mauls 2–3 section, bored by the BTC consortium of Webuild, Ghella, Cogeis and PAC. The project's 5 m exploratory tunnel had been connected across the border in September 2025.

At 55 km portal to portal, or 64 km including the Innsbruck bypass, the finished link will be the world's longest underground main line railway. BBT SE has put total project cost at roughly EUR 10.5bn: EUR 8.54bn of construction works, more than EUR 1bn of risk provision and EUR 903m covering expected inflation on future spend. The EU has committed EUR 700m from the second CEF2 call.

Ninety per cent is where the risk changes shape

For contractors the interesting figure is not the 90%. It is what the remaining 10% consists of. Excavation is now a residual activity. The value still to be delivered sits in track, traction power, ventilation, drainage, fire and life-safety systems, and ETCS fit-out inside a 55 km twin-bore tube with no daylight in the middle.

That is a different industry from tunnelling: different suppliers, different interfaces, different failure modes, and a commercial model built on interface management rather than muck volumes. It is also the phase in which long tunnel programmes tend to lose time, because systems work cannot start until the civil structure is handed over clean, and every access clash pushes commissioning to the right. The early-2032 opening is a systems date, not a mining date. Anyone pricing supply-chain exposure to the Brenner from here should be looking at rail systems integrators, not TBM fleets.

Then it opens into Bavaria

A base tunnel earns its capital only if trains can reach it. On the Austrian and Italian sides they largely can. On the German side they cannot.

The Brenner Nordzulauf, the new and upgraded line from Munich via Rosenheim to Kufstein, is the missing piece. Deutsche Bahn puts the cost at around EUR 8.6bn plus a buffer of more than EUR 7bn for inflation and risk, taking the scheme close to EUR 15bn. RailFreight.com reported in April 2026 that completion could slip to 2050 after the Bavarian state government rejected DB's proposed alignment towards Kufstein; the CSU and Freie Wähler want more of the Kufstein–Ostermünchen route placed in tunnel, which adds both cost and years. Federal parliamentary proceedings on the scheme were only due to begin this summer.

If those dates hold, the world's longest rail tunnel spends its first eighteen years discharging into a nineteenth-century alignment through the Inn valley. The corridor capacity that justifies the tunnel, the shift of tens of millions of tonnes of Alpine freight from road to rail, is set at the German end rather than under the Alps.

Italy is pouring concrete while Germany picks a line

The southern side reads very differently. RFI has awarded a Webuild–Implenia consortium, split 51:49, a EUR 1.07bn design-and-build contract for the 22 km high-capacity railway between Fortezza and Ponte Gardena, the first priority lot of the southern access. Bypasses at Trento, Bolzano and Rovereto follow, and the wider Fortezza–Verona programme is tied to CEF co-financing running through the second half of this decade, broadly in step with the tunnel itself. Italy and Austria have spent twenty years building the hard part. Germany has spent the same twenty years deciding where to put the easy part.

What a corridor is worth with one link missing

For sponsors and lenders this is the recurring lesson of European corridor building: the megaproject is bankable, the network around it is not. Base tunnels have identifiable owners, ring-fenced project companies, EU grants and a single delivery programme with a single set of dates. Approach routes are ordinary domestic rail schemes competing for ordinary domestic budgets against ordinary domestic opposition, and that is where corridor benefits get quietly deferred. Terminal operators, forwarders and freight buyers planning around a 2032 Brenner should model the German feeder as an open variable, not a date.

For contractors the read is more immediate. Excavation-led revenue on the Alpine corridors is winding down and systems-led revenue is starting, and the firms positioned for the second phase are not always the ones that won the first. PORR and Webuild have just banked a piece of engineering history 1,400 metres below the Brenner. The next decade of work on that corridor gets decided in a Bundestag committee room, and in the fit-out of a tunnel that is, in effect, already dug.