“四变八”成雅高速扩容启动 预计通行能力将提升约50%

Core Points - The Chengya Expressway expansion project has officially entered the construction phase, marking a significant infrastructure development in Sichuan Province as part of the national "14th Five-Year Plan" [2] - The project involves a total estimated investment of nearly 30 billion yuan, with a planned completion date in 2029 [2] - The expansion will increase the expressway's capacity by approximately 50% by widening the lanes from a dual six-lane and four-lane configuration to a dual eight-lane configuration [3] Group 1: Project Overview - The Chengya Expressway, originally opened in 2000, will be expanded to approximately 159 kilometers, including a new Lu Mountain branch line of 24.367 kilometers [2] - The main line will undergo significant upgrades, including the reconstruction of 20 interchanges and the addition of 4 new interchanges [2] - The new Lu Mountain branch will reduce travel time between Lu County and Mingshan District from 1 hour to 20 minutes, addressing the lack of direct expressway connections [2] Group 2: Technological and Operational Enhancements - The expansion will incorporate smart highway features, enhancing operational management through digital and intelligent systems, including dynamic lane control and emergency response measures [3] - The project aims to create a safer, more convenient, and comfortable expressway experience for travelers, integrating tourism and transportation [3] Group 3: Construction Strategy - The construction will focus on minimizing traffic disruption by implementing design and traffic organization strategies, such as single-side widening and phased construction [4] - The project will ensure that the existing road base remains stable while integrating new construction, addressing potential settlement issues through advanced engineering techniques [4] - All construction units have commenced work on various segments of the project, with simultaneous development of supporting infrastructure to ensure effective logistics and support [5]