It was a monumental effort that included eight tunnel boring machines (TBM) and took nearly three years for the 42-km (26-mile) tunneling portion of the Crossrails Project to be completed in June. The British Prime Minister David Cameron and Mayor of London, Boris Johnson, celebrated the completion of Crossrail's tunnels by going 40 m (131 ft) below the capital to thank the men and women who are constructing the new ?14.8 billion east-west railway.
展开▼
