Summary_x000D_
_x000D_
The total cost of the upgrade is expected to tick in at 1.2 billion Swiss francs ($1.5 billion). The upgrade will require fully replacing the components in 1.2 kilometres of the 27-kilometre tunnel
Summary_x000D_
_x000D_
The total cost of the upgrade is expected to tick in at 1.2 billion Swiss francs ($1.5 billion). The upgrade will require fully replacing the components in 1.2 kilometres of the 27-kilometre tunnel