North-south coridor after Ceneri opening

Toma Bacic

Hello all!
As the opening of the Ceneri base tunnel is scheduled for September 4, I am interested what infrastructure projects will follow on the north-south corridor.
According to what I learned, the southern extension of Ceneri is planned, but what is the status of that project now? Also, when the opening of the new Bözbergtunnel is planned? Also, what is the status of the southern extension of the Zimmerberg Base Tunnel?
Finally, when the second track between the Zug and Arth-Goldau (the complete section will be doubled or just some parts) will be opened?

Thank you very much and regards

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