Underground construction in the world is increasing, metal ores are mined deeper, and there is an ever-growing demand in emerging countries for metals, infrastructure and energy.
Plans are in hand to upgrade the Bayonne Bridge in the USA. The Port Authority of New York and New Jersey intends to raise the central span of the bridge from its current height of 46-65.5m. The port authority has approved a US$1 billion grant for the project. The work is needed to allow larger vessels to pass under the bridge by 2014. Other options have included building a new bridge or constructing a road tunnel but the upgrades to the Bayonne Bridge have been regarded as the most cost effective.
China's investment in landmark infrastructure projects continues with the announcement of plans for a 50km expressway as well as a bridge spanning the Pearl River.
