 The consortium has started to build a 100m demonstration tunnel in Qiandao Lake in China eastern province of Zhejiang.Inside it, two layers of one-way motorways will run through in the middle, with two railway tracks flanking them.The Qiandao Lake prototype will serve to help plan for the project of a 3,300-meter submerged floating tunnel in the Jintang Strait, in the Zhoushan archipelago, also situated in Zhejiang.