Keeping the world's longest railroad tunnel safe

The Gotthard Base Tunnel in Switzerland is 57km long: and I think its greatest piece of safety equipment is nowhere near the tunnel itself.

■ Thanks to Swiss Federal Railways https://www.sbb.ch/ - drone filming near the tracks was specially approved with railway staff.

■ For tours into the Gotthard Tunnel and to the visitors' window, see Uri Tourism: https://www.uri.swiss/de/erleben/seil...

Camera: Alicja Pahl
Producer: Sebastian Capeda at Viven https://viven.ch
Editor: Michelle Martin Twitter: mrsmmartin

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