It consists of a 6.7km tunnel starting on the Shenzhen side leading to 19 bridges, totalling 43km in length. The tunnel is the world’s longest and widest underwater steel-shell concrete tunnel ...
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://eandt.theiet.org/2024/07/01/china-opens-50km-long-shenzhen-zhongshan-link-bridge-tunnel-system
China opens 50km-long Shenzhen-Zhongshan Link bridge-tunnel system
eandt.theiet.orgChina has finally opened the 50km-long Shenzhen-Zhongshan Link to traffic.