21世纪经济报道记者李金萍 深圳报道 12 月 29 日，家住深圳龙岗区的小林，通勤路程有了新变化。此前，他前往位于罗湖区的公司上班，需在地铁 5 号线黄贝岭站换乘；如今，随着5号线西延 线开通，小林无需中转即可直达目的地，不仅省去了换乘的繁琐，还比往常节省了 5 分钟的地铁车程。 这是地铁5号线西延线开通为该线路的乘客带来的乘车新体验。 12月28日，深圳四条地铁线路同时开通，除了上述5号线西延段，8号线三期、11号线二期红岭南段和13号线一期北段也同步开通。 至此，深圳轨道交通运营里程增至634.5公里，车站达441座，实现全市各区轨道交通全覆盖，线网密度保持全国内地城市首位。 无独有偶，同为大湾区经济引擎的另一座城市广州，近期也迎来轨道建设密集"上新期"。11月，广州同日开通2条（段）地铁线路；12月29日，广州地铁线 网再迎新成员——22号线后通段（陈头岗至芳村）开通初期运营，这条线路的开通使广州地铁运营总里程达到779.9公里。 两座大湾区核心城市的轨道扩容动作。从运营里程看，广州以 779.9 公里的成绩稳居全国第三；从客流数据看，深圳进站客流跻身全国前三，客运强度更连 续 24 个月领跑全国。 ...

Core Viewpoint - The extension of Line 5 in Shenzhen is set to enhance transportation efficiency in the southern region, creating a significant transit artery of approximately 50.526 kilometers with 37 stations, expected to open within the year [1][2]. Group 1 - The Line 5 west extension project has achieved dual power supply (35KV and 400V), ensuring stable electricity for equipment and necessary power for testing and debugging [1][2]. - The project spans 2.88 kilometers, starting from Huangbeiling Station and ending at the Grand Theater Station, with three new stations: Dongmen Road Station, Jianshe Road Station, and Grand Theater Station [1][2]. - The extension will allow direct access to the Grand Theater Station from Line 5 without needing to transfer to Line 2, significantly improving convenience for commuters [2]. Group 2 - The construction faced challenges due to dense urban infrastructure and complex underground networks, including the need to tunnel under existing structures like the Guangzhou-Shenzhen Railway [2]. - The successful completion of the dual power supply marks a critical milestone in the project, providing essential power for the operational readiness of the line [2].