BEIJING, China – Construction on the main portion of the Hong Kong-Zhuhai-Macao Bridge’s The Cross Harbor Tunnel has been completed. It is the world’s longest, deepest-buried tunnel in the seabed, and the most comprehensive, technically difficult immersed tube tunnel. The bridge will have a traffic permit at the end of 2017. After an official ceremony, reporters, along with the Hong Kong-Zhuhai-Macao bridge builder, traveled the tunnel in a battery car. Along the open-air tunnel, the battery car traveled up to 15 km per hour, from west of the artificial island entrance to the east of the island exit, about 20 minutes. … Read more