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Il potenziamento della circonvallazione nord di Zurigo, uno dei tratti autostradali più congestionati di tutta la Svizzera, è entrato in una nuova fase. Dopo un anno e mezzo di lavori preparatori, martedì è stato dato avvio allo scavo del terzo cunicolo del Gubrist. Entro la fine del 2022 permetterà di portare da 4 a 6 il numero delle corsie a disposizione dei 120'000 veicoli che quotidianamente percorrono i 10 chilometri tra lo svincolo di Limmattaler Kreuz e la diramazione di Zurigo nord (A1/A4) aperti nel 1985.
Una detonazione ha dato l'avvio all'avanzamento dei minatori. Dovrebbero completare lo scavo il cunicolo grezzo, lungo circa 3 chilometri, nel giro di tre anni. Poi ce ne vorranno altrettanti per completare l'opera. L'investimento complessivo di 1,55 miliardi garantirà una nuova scorrevolezza al traffico sul tratto dove si verifica circa un quarto di tutte le colonne registrate sulle strade elvetiche.
Diem/ATS
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