Core Viewpoint - The construction of the Xinyi Expressway, a significant infrastructure project in Yibin, is expected to enhance regional connectivity and stimulate economic development in the Sichuan province, with a total investment of approximately 14.3 billion yuan and a construction period of four years [1]. Group 1: Project Overview - The Xinyi Expressway spans 65 kilometers for the main line and 24.3 kilometers for connecting lines, with a total investment of about 14.3 billion yuan and a construction period of four years [1]. - The project will significantly reduce travel time from Yibin city to Xinshi Town in Pingshan County from over two hours to under one hour [1]. - The expressway will connect multiple major highways, facilitating multi-directional connectivity with Yunnan, Chongqing, and Chengdu [1]. Group 2: Technical Challenges - The expressway features a bridge-tunnel ratio of 66.25%, indicating that approximately two-thirds of the route will involve crossing mountains and rivers, which increases construction complexity and costs [2][3]. - The project includes 48 bridges and 8 tunnels, with significant engineering challenges such as the 7.3-kilometer Zhengjiashan Tunnel, which requires extensive safety measures against high-pressure water and gas leaks [2][3]. - The geological conditions present additional challenges, including the need for slope stabilization and foundation reinforcement due to the presence of karst topography and soft soil [3]. Group 3: Economic Impact - The Xinyi Expressway will serve as a crucial link between the southern Sichuan economic zone and the Panxi economic zone, providing a direct transportation route for mineral and clean energy resources [4]. - The expressway will reduce logistics costs and travel distances for transporting resources from the Panxi region to Yibin, enhancing regional economic collaboration [4]. - The project is expected to create approximately 8,000 jobs during peak construction, contributing an estimated 8 million yuan in income to local residents [5]. Group 4: Regional Development - The expressway will facilitate the integration of local agricultural products into broader markets, enhancing the economic prospects for local farmers [5]. - It will also support the development of the photovoltaic industry in the region by improving the transportation of equipment and components [5]. - The project aims to promote tourism by connecting local attractions within a one-hour travel radius, contributing to rural revitalization and industrial upgrades [5].

Core Viewpoint - The construction of the Xinyi Expressway (G8517) officially commenced on August 31, 2023, aiming to enhance connectivity between the southern Sichuan economic zone and the Panxi economic zone, thereby facilitating regional economic development [1][2]. Group 1: Project Overview - The Xinyi Expressway starts from Xinshi Town in Ping Shan County, Yibin City, and connects to the under-construction G4216 Ping Shan New City to Jinyang Expressway [1]. - The total length of the main line is 65.1 kilometers, with an additional 22.5 kilometers of three connecting lines being constructed simultaneously [1]. - The project is designed as a dual four-lane expressway with a speed limit of 80 km/h and a roadbed width of 25.5 meters [1]. Group 2: Construction Details - The project is divided into six construction sections, with all contractors having mobilized to the site [2]. - Key control projects, such as the Yangjingshan Tunnel and Dashanding Tunnel, are currently undergoing preliminary work for access roads [2]. - The construction period is set for four years, with completion and opening to traffic expected by 2029 [1][2]. Group 3: Strategic Importance - The Xinyi Expressway is part of the National Highway Network Planning (2022-2035) and is included in the 102 major projects of the 14th Five-Year Plan [2]. - Upon completion, travel time from Yibin to Xichang will be reduced from 7 hours to approximately 4.5 hours, and travel time from Yibin city center to Xinshi will be cut to under 1 hour [2]. - The expressway will create a convenient corridor connecting the Panxi economic zone, southern Sichuan economic zone, and Chongqing, enhancing trade and industrial cooperation between these regions [2].