Swiss here. Not an expert on the project but AFAIK the idea is to reduce the impact of transportation on the surface.
With globalization and population increase, the need for point to point logistic is going to go through the roof in urban areas in the next years.
Currently this translates to having more trucks on the highways and roads, as our rail wail system is close to saturation already. Not to mention our road are really small compared to US (ie: highways are two-lanes per direction). This creates a ton of air and noise pollution and traffic jams.
This new transportation system should absorb some of the goods traffic and hopefully scale country-wide in the future while sparing the environnement at the surface as much as possible.
With globalization and population increase, the need for point to point logistic is going to go through the roof in urban areas in the next years.
Currently this translates to having more trucks on the highways and roads, as our rail wail system is close to saturation already. Not to mention our road are really small compared to US (ie: highways are two-lanes per direction). This creates a ton of air and noise pollution and traffic jams.
This new transportation system should absorb some of the goods traffic and hopefully scale country-wide in the future while sparing the environnement at the surface as much as possible.