国内首条穿越泉域岩溶区地铁试运行

Core Points - The Jinan Metro Line 4, the first subway line in China to traverse a karst aquifer area, commenced trial operations on August 31 [2][4][6] - The line runs approximately 40 kilometers along the east-west traffic artery of Jinan, specifically along Jinan's major thoroughfare, Jingshi Road [2][4][6] Summary by Sections - Project Overview - Jinan Metro Line 4 is notable for being the first subway line in China to cross a karst aquifer region [2][4] - The total length of the line is around 40 kilometers [2][4][6] - Operational Details - The trial operation of the line began on August 31 [2][4][6] - The line is strategically positioned along Jinan's east-west transportation corridor [2][4][6]