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L'ampliamento della galleria ferroviaria di Coldrerio del 1874 inizierà il prossimo mese di gennaio, con l'avvio dei lavori di genio civile del manufatto a due binari lungo 96 metri, in base ai requisiti stabiliti dal progetto "Corridoio di 4 metri". La messa in esercizio completa del tunnel, per cui è stato fatto un investimento di 33 milioni di franchi, è prevista per la fine della primavera del 2016, malgrado la complessità della realizzazione del progetto e i vincoli di tipo tecnico e idrogeologico.
Le conseguenze dell'opera di ampliamento sui passeggeri sono state minimizzate; gli interventi saranno eseguiti gestendo il traffico su due binari e la chiusura completa della galleria è prevista unicamente durante due fine settimana, nel mese di novembre del 2015.
Con l'apertura delle gallerie di base del San Gottardo e del Monte Ceneri, il nuovo tunnel permetterà, dal 2020, il transito di convogli merci con semi-rimorchio fino ad un'altezza agli angoli di 4 metri.
Red. MM
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