海南三亚首个水下隧道顺利完成海底首次贯通

Core Viewpoint - The Sanya River Estuary Channel Project, a key initiative in Hainan Free Trade Port, has successfully completed its underwater tunnel's first sea crossing, significantly enhancing transportation efficiency in the region [2][5][7]. Group 1: Project Details - The Sanya River Estuary Channel Project is the first underwater tunnel in Sanya, constructed by China Railway 20th Bureau [2][5][7]. - The total length of the tunnel is 3.118 kilometers [2][5][7]. Group 2: Impact on Transportation - The completion of the project will eliminate the transportation bottleneck between the two banks of the Sanya River, reducing travel time from 30 minutes to under 5 minutes [2][5][7]. - This development will further optimize the spatial development pattern of Sanya, facilitating "east-west linkage and north-south connectivity" [2][5][7]. Group 3: Economic Significance - The project is expected to provide favorable conditions for the development of Hainan Free Trade Port [2][5][7].