一条高速公路如何逐“绿”前行？

Core Viewpoint - The construction of the Shitai Expressway expansion project in Hebei is focused on green and low-carbon principles, utilizing recycled materials and innovative technologies to enhance sustainability in road construction [1][3]. Group 1: Project Overview - The Shitai Expressway is being expanded from 4 lanes to 6 lanes, with some sections featuring 8 lanes, and the design speed is increased from 60 km/h to between 80 km/h and 100 km/h [3]. - The project is significant as it is the first "carbon-neutral" expressway in Hebei and the first full-line expansion of a mountainous expressway in the province [3]. Group 2: Environmental Initiatives - The project incorporates rubber asphalt made from recycled tires, with a maximum blend of 50%, which enhances road durability, reduces noise, and promotes waste recycling [1][3]. - Green vegetation bags are added to the slope protection works to support ecological restoration [3]. Group 3: Investment and Infrastructure Development - Since the beginning of the 14th Five-Year Plan, Hebei has invested 165.8 billion yuan in highway construction, with plans to complete an additional 312 kilometers of highways by 2025, bringing the total to over 9,000 kilometers [4]. - The project aligns with the national strategy to build a comprehensive transportation network, enhancing connectivity with major highways and neighboring provinces [4].