Sub-Urban Renewal
'You won't hear much talk of it outside of specialised
engineering circles, but we're at a tipping point. The cost to burrow
down is dropping, while the price (and hassle) of erecting a skyscraper
in a dense urban area just keeps rising. The breakthrough comes thanks to
tunneling technologies that are now being used on huge transportation
projects, like Boston's Big Dig and
Moscow's Lefortovo highway tunnel
project. Over the next ten years these techniques will be used
to hollow out space beneath the world's great cities' (
Wired )
»
See also this Boston Globe article on
the opening of the Big Dig
