Line 12 of the Beijing Subway (Chinese: 北京地铁12号线; pinyin: běijīng dìtiě shí'èr hàoxiàn) is rapid transit line under construction in Beijing.^[4] The line is 29.6 km (18.4 mi) with 20 stations. It is fully underground.^[3] The line between Sijiqingqiao and Dongbabei is planned to open at the end of June 2024, due to planning adjustments east of Dongbabei.^[1][2]

Quick Facts Overview, Other name(s) ...

Line 12
Construction site of Changchunqiao station in July 2022
Overview
Other name(s)	M12 (planned name)
Status	Under Construction
Termini	Sijiqingqiao Dongbabei
Stations	20
Service
Type	Rapid transit
System	Beijing Subway
Depot(s)	Tiancun, Dongba
Rolling stock	8-car Type A
History
Planned opening	June 2024 (planned)[1][2]
Technical
Line length	29.6 km (18.4 mi)
Character	Underground[3]
Track gauge	1,435 mm (4 ft 8+1⁄2 in)
Operating speed	80 km/h (50 mph)
Route map Legend Tiancun yard Yongding River diversion canal Sijiqingqiao Landianchang Changchunqiao Line 10 outer – inner Jingmi diversion canal Suzhouqiao Line 16 Wanpingcheng – Bei'anhe Renmin Daxue (Renmin Univ.) Line 4 Tiangongyuan – Anheqiaobei Dazhongsi Line 13 Xizhimen – Dongzhimen Jingzhang ICR Qinghuayuan tunnel Xiaoyue river Jimenqiao Changping line Guogongzhuang – Changping Xishankou Beitaipingzhuang Line 19 Xingong – Mudanyuan Madianqiao Anhuaqiao Line 8 Yinghai – Zhuxinzhuang Anzhenqiao Heping Xiqiao Line 5 Songjiazhuang – Tiantongyuanbei Guangximen Line 13 Dongzhimen – Xizhimen Dongtucheng ditch Ba river Xibahe Line 17 Workers' Stadium – Future Science City North connects line 17 Capital Airport Express Beixinqiao line 10 inner Sanyuanqiao Line 10 and Capital Airport Express line 10 outer Capital Airport Express Terminal 3 Ba river Jiangtaixi Gaojiayuan Line 14 Zhangguozhuang – Shangezhuang Tuofangying Shuangsha railway and Jingshen HSR CR Track Test Center (Beijing circular railway) Dongbaxi Dongba depot Dongsi Shitiao Dongbabei Line 3 Beixiao river Caogezhuangbei (future extension) Dongba Beijie (future extension) v t e

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The line will use 8-car Type A rolling stock.

Line 12's route has undergone substantial changes on the planners' drawing board. In the late 1990s, one draft of the subway plan showed Line 12 running from the Beijing South railway station to Huangcun.^[6] The Beijing South railway station was then built with subway platforms for only Lines 4 and 14. The old plan of Line 12 is cancelled now.

A new plan of Line 12 was announced at January 2012.^[7] In June 2012, there were several media reports listing the planned stations of the line. The final planning of the line started from Sijiqing in Haidian District east to Guanzhuangluxikou in Chaoyang District, following the northern Third Ring Road.^[8] The entire line has 21 stations,^[4] of which 15 will have transfers with other lines.^[9] The line will provide relief for the northern arc of the congested Line 10 loop line.^[4]