Bannan line
Ximen metro station, located in Ximending, Taipei
Overview
Other name	Blue Line
Native name	板南線
Owner	Taipei DORTS
Locale	Taipei and New Taipei, Taiwan
Termini	Dingpu Taipei Nangang Exhibition Center
Stations	23
Color on map	Blue
Service
Type	Rapid transit
Services	Dingpu–Nangang Exhib. Center (full) Far Eastern Hospital-Nangang Exhib. Center (short-turn)
Operator(s)	Taipei Rapid Transit Corporation
Depot(s)	Nangang Tucheng
Rolling stock	C321 C341
History
Opened	24 December 1999 (1999-12-24)
Technical
Line length	26.6 km (16.5 mi)
Number of tracks	2
Character	Underground
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification	750 V DC third rail
Operating speed	80 km/h (50 mph)
Route map Legend BL23 Nangang Exhibition Center Taipei Metro Wenhu line Taiwan Railway West Coast line BL22 Nangang Nangang depot Taiwan High Speed Rail BL21 Kunyang BL20 Houshanpi BL19 Yongchun BL18 Taipei City Hall BL17 Sun Yat-sen Memorial Hall BL16 Zhongxiao Dunhua BL15 Zhongxiao Fuxing Taipei Metro Wenhu line BL14 Zhongxiao Xinsheng Taipei Metro Zhonghe–Xinlu line BL13 Shandao Temple BL12 Taipei Main Station Taipei Metro Zhonghe–Xinlu line Taoyuan Metro Airport MRT Taipei Metro Songshan–Xindian line BL11 Ximen Taipei Metro Songshan–Xindian line BL10 Longshan Temple Wanhua Xindian River Taipei New Taipei City BL09 Jiangzicui New Taipei Metro Circular line Xinpu Minsheng BL08 Xinpu New Taipei Metro Circular line BL07 Banqiao BL06 Fuzhong Taiwan Railway West Coast line Taiwan High Speed Rail BL05 Far Eastern Hospital Tucheng depot BL04 Haishan BL03 Tucheng BL02 Yongning BL01 Dingpu

The Bannan or Blue line (code BL) is a metro line of Taipei Metro in Taipei, Taiwan, with a total of 23 stations serving the districts of Nangang, Xinyi, Daan, Zhongshan, Wanhua, Banqiao and Tucheng. The line's name is a portmanteau of Banqiao and Nangang.

The entire line runs underground. The excavation of tunnels using the cut-and-cover method resulted in large scale detouring of road traffic. Because of that, the line runs beneath existing roads and totals 28.3 km (17.6 mi).

Service on this line is divided into a full-length service from Taipei Nangang Exhibition Center to Dingpu, as well as a shorter service from Kunyang to Far Eastern Hospital.

Due to Taipei City Hall being at the centre of the Taipei 101 New Year's festivities, intervals between trains can be reduced to a minimum of 135 seconds, transporting up to 39,000 passengers per hour.^[1] This results in an average of about 27 trains per hour on the line during peak hours.

• 8 November 1990: The Nangang section begins construction.
• 30 December 1991: The Taipei Main Station western underground passageway opens.
• 24 December 1993: Nangang section construction at the intersection of Zhongxiao East Rd and Shaoxing Rd caves in, causes traffic jams.
• 30 October 1998: Construction is completed on the tunnel between Kunyang and Houshanpi.
• 17 September 2001: Typhoon Nari floods many stations, rendering them nonoperational.
• 29 November 2001: Taipei Main Station re-opens for service.
• 30 December 2003: The Nangang section eastern extension to Nangang begins construction.
• 17 November 2004: The Nangang section eastern extension to Taipei Nangang Exhibition Center begins construction.
• 21 May 2014: The 2014 Taipei Metro attack occurs between Longshan Temple and Jiangzicui when 21-year-old university student Cheng Chieh attacked passengers with a knife, leading to 4 deaths and 24 injuries.
• 28 September 2018: Half-height platform edge doors are installed in Tucheng, making all stations on this line and entire Taipei Metro system have some form of platform doors.

As of December 2017, the typical off-peak service is:

• 8 trains per hour (tph) between Far Eastern Hospital and Kunyang
• 7 tph between Dingpu and Taipei Nangang Exhibition Center

Code	Station name	Station type		Locale		Sta. distance (km)		Opened date	Transfer
		Structure	Platform			Previous[3]	Total
Bannan line
	Dingpu 頂埔	Underground	Island	Tucheng	New Taipei	—N/a	0.00	2015-7-6	Sanying line
	Yongning 永寧					1.95	1.95	2006-5-31	—N/a
	Tucheng 土城					1.11	3.06		Wanda–Shulin line
	Haishan 海山					1.47	4.53		—N/a
	Far Eastern Hospital 亞東醫院			Banqiao		1.64	6.17		Taishan-Banqiao LRT
	Fuzhong 府中		Split			1.45	7.45		—N/a
	Banqiao 板橋		Island			0.65	8.10		Circular line Western Trunk line Taiwan High Speed Rail
	Xinpu 新埔					1.28	9.38	2000-8-31	Circular line (Y17)
	Jiangzicui 江子翠					0.87	10.25		—N/a
	Longshan Temple 龍山寺			Wanhua	Taipei	3.08	13.33	1999-12-24
	Ximen 西門		Island/Split	Zhongzheng		1.31	14.64		Songshan–Xindian line
	Taipei Main Station 台北車站		Island			1.35	15.99		Tamsui–Xinyi line Western Trunk line Taiwan High Speed Rail Taoyuan Airport MRT (A1)
	Shandao Temple 善導寺					0.68	16.67		—N/a
	Zhongxiao Xinsheng 忠孝新生					0.94	17.61		Zhonghe–Xinlu line
	Zhongxiao Fuxing 忠孝復興			Daan		1.12	18.73		Wenhu line
	Zhongxiao Dunhua 忠孝敦化					0.67	19.40		—N/a
	Sun Yat-sen Memorial Hall 國父紀念館			Xinyi		0.73	20.13		Zhonghe-Guangfu line
	Taipei City Hall 市政府					0.84	20.97		—N/a
	Yongchun 永春					0.99	21.96	2000-12-30	Circular line
	Houshanpi 後山埤			Nangang		0.82	22.78		—N/a
	Kunyang 昆陽					1.36	24.14
	Nangang 南港					1.42	25.56	2008-12-25	Keelung MRT Western Trunk line Taiwan High Speed Rail
	Taipei Nangang Exhibition Center 南港展覽館					1.09	26.65	2011-2-27	Wenhu line Keelung MRT

• Official website