海南第一长隧鹦哥岭特长隧道双向贯通

Core Viewpoint - The Yanggoling Tunnel, the longest highway tunnel in Hainan Province, has achieved dual-hole safe completion, marking a significant milestone in the construction of the Shiyun to Baisha Expressway [3]. Group 1: Project Overview - The Yanggoling Tunnel is located in the Yanggoling National Nature Reserve and is a key control project for the Shiyun to Baisha Expressway, constructed by Hainan Provincial Transportation Investment Group [3]. - The left line of the tunnel is 8,282 meters long, while the right line is 8,260 meters long, making it the longest highway tunnel in Hainan Province [3]. - The project is designed to meet the standards of a four-lane expressway with a design speed of 80 kilometers per hour [3]. Group 2: Economic and Social Impact - The completion of the Yanggoling Tunnel signifies a critical breakthrough in the construction of the Shiyun to Baisha Expressway, facilitating rapid connectivity among Wuzhishan, Baisha, and Qiongzhong [3]. - The project will enhance the road network in central Hainan, accelerate the development of regional ecological tourism resources and specialty agricultural products, and contribute to rural revitalization and poverty alleviation efforts [3]. - It will also provide essential transportation support for the construction of Hainan Free Trade Port [3].