本报北京10月27日电 （记者王昊男）10月25日，北京轨道交通18号线正式开始按照运行图开展不载客 试运行（即"跑图"）。至此，北京今年计划开通的轨道交通18号线、17号线中段、6号线南延等3条 （段）新建地铁已全部进入"跑图"阶段。通车后，北京轨道交通运营里程将突破900公里。 (责编：卫嘉、白宇) 作为贯穿北京城区南北方向的大运量轨道交通干线，17号线串联起天通苑、望京西、太阳宫、潘家园等 居住区。其中南段（嘉会湖—十里河）和北段（工人体育场—未来科学城北）已分别于2021年和2023年 开通。中段从十里河至工人体育场，长约8.2公里，共设车站4座。线路建成后，17号线将实现全线贯 通。 《 人民日报 》（ 2025年10月28日 11 版） 据北京市重大项目办相关负责人介绍，根据年度建设计划，3条（段）新建地铁总长约30.1公里。其 中，18号线（马连洼—天通苑东）是一条位于北京北部东西向的骨干线路，线路途经海淀、昌平两区， 长约19.8公里，共设车站11座，其中换乘站4座，建成后将作为支撑北京北部区域发展的重要基础设 施。6号线南延长约2.1公里，北起潞城站，沿运河东大街至潞阳站，是北京城市副中心轨 ...

Core Points - Beijing's subway line 18 officially began trial operations on October 25, marking the completion of the "running map" phase for three new subway lines planned for this year [1] - The total length of the three new subway lines is approximately 30.1 kilometers, contributing to a total operational subway mileage in Beijing exceeding 900 kilometers [1] Summary by Sections Line 18 - Line 18, running from Malianwa to Tiantongyuan East, is a key east-west line in northern Beijing, spanning about 19.8 kilometers with 11 stations, including 4 transfer stations [1] - This line is expected to support the development of the northern region of Beijing [1] Line 6 South Extension - The south extension of Line 6 is approximately 2.1 kilometers long, starting from Lucheng Station and extending to Luyang Station, playing a crucial role in the urban sub-center's transit network [1] Line 17 - Line 17 connects major residential areas such as Tiantongyuan, Wangjing West, and others, with the southern section already opened in 2021 and the northern section in 2023 [1] - The middle section, approximately 8.2 kilometers long with 4 stations, will complete the full line connectivity upon its completion [1]