四川最长8车道高速公路即将通车

Core Viewpoint - The Chengnan Expressway expansion project, spanning approximately 240 kilometers, is set to open by the end of December, marking it as the largest and longest highway expansion in Sichuan province, featuring an 8-lane configuration [5][10]. Group 1: Project Overview - The Chengnan Expressway expansion will connect Nanchong and Chengdu, with a total length of 215.697 kilometers, primarily widening existing roads from dual 4-lane to dual 8-lane [6][7]. - The project includes a new 30.35-kilometer section with dual 6-lane roads, and the design speed has been increased to 100-120 kilometers per hour [7]. Group 2: Design and Aesthetics - The expressway features cultural elements in its design, with decorative patterns reflecting local cultural characteristics, such as the Sun God Bird and panda motifs in Chengdu, and Three Kingdoms themes in Nanchong [8][9]. - Additional aesthetic enhancements include bridge decorations, sculptures in interchange areas, and artistic designs in tunnels and sound barriers to reduce visual fatigue during long drives [9]. Group 3: Traffic and Efficiency Improvements - The expansion aims to alleviate congestion on one of the most crowded highways in Sichuan, enhancing safety and traffic flow as the original 4-lane configuration was insufficient for increasing traffic demands [10]. - Each toll station along the expressway will see an increase in lanes, with the Daying East toll station upgraded from four to seven lanes, incorporating smart toll robots and self-service payment options to improve efficiency [10][11].