China is building the world’s longest cross-sea bridge which will connect three huge cities Hong Kong, Macau and Zhuhai. The Hong Kong-Zhuhai-Macau Bridge, soon to be the world’s longest cross-sea passage is now a step closer to completion. A 2.7-kilometre long tunnel has linked the Zhuhai part of the project as per the reports of Southern Metropolitan Daily.

The ongoing bridge project over the Pearl River Delta in China will connect three major cities – Hong Kong, Macau and Zhuhai and the 50 km link will cost approximately 10.6 billion dollars! The construction of bridge began in 2009 is expected to open by December this year. There have been many challenges throughout the project. The Y-shaped bridge starts from Lantau Island in Hong Kong and branches out to Zhuhai and Macau.

Artificial islands have been created to support the bridges and there is also an underwater tunnel so that large cargos and ships can pass through form above the tunnel. The tunnel was a major challenge since engineers had to work with soft underwater soil so engineers used pipes to hold the tunnel’s structure, freezing the soil into place with specialised equipment to prevent water leakage.

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Major work on the 55-km bridge were completed in September 2016 and the latest progression is that the 2.7 km tunnel which linked Zhuhai has been completed. Once the project is complete, the current four-hour drive from Hong Kong to Zhuhai will be reduced to 45 minutes!