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How do people want to live in metropolises that are getting increasingly larger and more complex? Already more than half the world's population lives in cities. By 2050 it is expected to be seven out of ten billion people. But space is limited – making it worth living in nevertheless is our greatest task in the 21st century. And so plans for this are being drawn up around the world. They make it clear that a hitherto neglected dimension is increasingly coming to the fore: the underground.
As early as the 19th century, the metropolises of Europe and North America reached a critical size. Thanks to construction measures – sewers, water supply lines, street lighting, the first subways – they were able to continue to grow. But their infrastructures are no longer efficient enough. Cities are again seeking and finding the solution underground: London has has built 42 km of tunnel with its new Crossrail line. The Paris metro network is being extended by around 200 km.
Exhibitor: Herrenknecht AG