China is planning another engineering marvel: the world’s longest tunnel, built under the sea. The 123-kilometre tunnel will be more than twice the length of the Channel Tunnel (50 kilometers) that connects the U.K. and France, China’s latest mega project is not short of ambition.
It will run between the northern city of Dalian and Yantai, on the east coast. There will be three bores. One for high speed rail, one for cars and another for maintenance. “Work could begin as early as 2015 or 2016,” said Wang Mengshu, an expert at the Chinese Academy of Engineering. The new tunnel will knock more than 1280 kilometres off the current journey between the two cities.