The $29BN Megaproject in the Heart of a Mountain

Published at : 17 Dec 2025

Fred Mills takes his deepest dive yet into one of the world's biggest megabuilds.
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Note: The $29BN figure refers to the entire new railway. The estimated cost of the cross-border section is €11.1BN ($13BN).

Full story here - https://www.theb1m.com/video/inside-the-lyon-turin-mega-tunnel

Additional footage and images courtesy of Tunnel Euralpin Lyon Turin (TELT), Euronews, No Comment and VOA.

00:00 Intro
01:16 The Lyon-Turin Route
03:38 The Base Tunnel
05:40 Drill and Blast
07:48 Reinforcement
10:44 The New Railway
12:47 Tunnel Boring Machine
16:48 The Geology
18:07 The Cathedral
21:13 Ventilation
22:53 Opposition and Cost
24:16 Remaining Work
26:10 Conclusion

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