重要节点今日打通！北京地铁17号线中段实现长轨贯通，今年底有望全线贯通运营

Core Points - The completion of the last long rail joint welding on June 23 marks the full connection of the middle section of Beijing Metro Line 17, laying a solid foundation for trial operation by the end of the year [1][3] - The total length of the track bed for the middle section is approximately 14.346 kilometers, with 10 long rails and 1,150 rail joints [3] - The line will significantly enhance transportation accessibility in Beijing's eastern region, connecting various residential areas and promoting economic activity [5][6] Group 1 - The Beijing Metro Line 17 is a major north-south transit line spanning 49.97 kilometers with 21 stations, passing through four administrative districts [5] - The middle section connects the already operational southern and northern segments, reducing travel time from Jiahu Lake Station to Future Science City North Station to just 66 minutes [5] - The line will operate with A-type trains, featuring an 8-car configuration and peak intervals of 3 minutes [5] Group 2 - The completion of the line will improve overall network efficiency by diverting passenger flow from the northern section of Line 5 and alleviating congestion on Line 10 [6] - The line aims to achieve three core objectives: "throughput acceleration, congestion alleviation, and urban empowerment" [6]