The Bannan line or Blue line (code BL) is a line of the Taipei Metro named after the districts it connects: Banqiao and Nangang. It has a total of 23 stations serving the Nangang, Xinyi, Daan, Zhonghsan, and Wanhua districts, as well as into the New Taipei districts of Banqiao and Tucheng.
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 Taipei Nangang Exhibition Center but terminating at Far Eastern Hospital.
Due to Taipei City Hall Station being at the center 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. This results in an average of about 27 trains per hour on the Nangang Line during peak hours.
As of December 2017, the typical off-peak service is:
|Services||Code||Station Name||Transfer||Location||Distance (km)|
|●||●||BL23||Nangang Exhibition Center||南港展覽館||(BR24)||Nangang, Taipei||26.6|
|●||●||BL22||Nangang||南港|| West Coast (097)
(Wufenpu Commercial Zone)
|●||●||BL18||Taipei City Hall||市政府||21.1|
|●||●||BL17||Sun Yat-sen Memorial Hall||國父紀念館||[planned]||Xinyi, Taipei
|●||●||BL16||Zhongxiao Dunhua||忠孝敦化||Da'an, Taipei||19.6|
(Natl. Taipei Univ. of Tech.)
|●||●||BL12||Taipei Main Station||台北車站|| (R10)
West Coast (100)
300 m: Taoyuan Airport MRT (A1 Taipei Main)
(Bangka Commercial Zone)
|200 m: West Coast (101 Wanhua)||Wanhua Taipei||13.3|
|●||●||BL09||Jiangzicui||江子翠||Banqiao, New Taipei||10.2|
|●||●||BL07||Banqiao||板橋|| West Coast (102)
(Lin Family Mansion and Garden)
|●||●||BL05||Far Eastern Hospital||亞東醫院||6.0|
|●||BL04||Haishan||海山||Tucheng, New Taipei||4.5|
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