Circular line (Taipei metropolitan area)

Hitachi Rail STS supplied electromechanical equipment for the line, including driverless technology and CBTC signaling.^[6][1] Dapinglin, currently the only underground station on the line, was constructed by RSEA Engineering Corporation and employed the cut-and-cover method.^[7]

Construction for the first phase officially broke ground on 11 July 2011 on a 6.3 km (3.9 mi) elevated section between Zhonghe and Banqiao.^[8] The section is estimated to cost NT$13.7 billion, with the entire first-stage 15.4 km (9.6 mi) route estimated to cost NT$54.7 billion to construct.

The line includes the first elevated split platforms in the system at Zhonghe, Qiaohe, and Zhongyuan due to the narrowness of the available station area.^[9][10]

The initial section between Dapinglin and New Taipei Industrial Park opened on 31 January 2020.^[3] On 5 May 2023, the Circular line was transferred from the Taipei Metro to the New Taipei Metro,^[11] with the fare structure still integrated with the Taipei Metro system, unlike light rail lines of the New Taipei Metro.^[12]

Unlike previous public art installations on the metro, it was decided that a smaller number of art pieces would be installed within the same budget, allowing for large-scale artwork.^[13]

Across the above ground section of the line, Emmanuelle Moureaux (a Tokyo based French architect and designer) spread distinctive bold colours across infrastructure – including steel beams and pillars, noise barriers, 13 stations and platforms, a bridge over the Tamsui River, and the exterior and interior design of the train.^[13][14]

The platforms, walls and ceilings of Banqiao station are decorated by French artist Daniel Buren, using regular, contrasting coloured stripes.^[13][15]

The western section of the line officially opened on 31 January 2020.^[3][16] Services between Zhonghe and Banqiao were temporarily suspended from 3 April 2024 onwards due to the 2024 Hualien earthquake,^[17] with the repair work expected to take one year to complete.^[18] The section reopened ahead of schedule on 12 December 2024 at 12:00 PM Taiwan Standard Time.^[19][20]

More information Code, Station name ...

Code[b]	Station name	Station type		Locale		Sta. distance (km)		Opened date	Transfer
		Structure	Platform			Previous	Total
Circular line
Continue with Y39 station
Y1	Taipei Zoo 動物園	Underground	Island	Wenshan	Taipei	3.240	49.079 0.000	Est. 2031-6	Wenhu line Shenkeng LRT Maokong Gondola
Y1A	Unreleased					1.139	1.139		—N/a
Y2						1.061	2.200
Y3						1.170	3.370
Y4						0.989	4.359
Y5				Xindian	New Taipei	0.586	4.945
	Dapinglin 大坪林					0.721	5.666	2020-1-31	Songshan–Xindian line
	Shisizhang 十四張	Elevated	Side			1.559	7.225		Ankeng LRT
	Xiulang Bridge 秀朗橋			Zhonghe		1.116	8.341		—N/a
	Jingping 景平					0.849	9.190
	Jingan 景安					1.157	10.347		Zhonghe–Xinlu line
	Zhonghe 中和		Split			1.440	11.787		Wanda–Shulin line
	Qiaohe 橋和					0.635	12.422		—N/a
	Zhongyuan 中原					0.732	13.154
	Xingfu 板新		Side	Banqiao		1.392	14.546
	Banqiao 板橋					0.952	15.498		Bannan line Western Trunk line Taiwan High Speed Rail
	Xinpu Minsheng 新埔民生					1.423	16.921		Bannan line (BL08)
	Touqianzhuang 頭前庄			Xinzhuang		1.800	18.721		Zhonghe–Xinlu line
	Xingfu 幸福					0.624	19.345		—N/a
	New Taipei Industrial Park 新北產業園區					1.560	20.905		Taoyuan Airport MRT
Y19A	Unreleased	Underground	Island	Wugu		0.900	21.805	Est. 2031-6	—N/a
Y19B						1.369	23.174
Y20			Split	Luzhou		0.977	24.151
Y21	St. Ignatius High School 徐匯中學		Side			1.280	25.431		Zhonghe–Xinlu line
Y22	Unreleased		Island			1.139	26.570		Wugu-Taishan LRT
Y23				Sanchong		0.786	27.356		—N/a
Y24			Split	Shilin	Taipei	1.869	29.225
Y25			Island			1.085	30.310
Y26	Shilin 士林					0.675	30.985		Tamsui–Xinyi line
Y27	Unreleased					0.537	31.522		—N/a
Y28						1.780	33.302
Y29	Jiannan Road 劍南路		Split	Zhongshan		1.984	35.286		Wenhu line
Y30	Unreleased		Island			0.928	36.214	Est. 2032-9	—N/a
Y31				Neihu		0.985	37.199
Y32						0.535	37.734
Y33						0.875	38.609
Y34						1.025	39.634
Y35						0.905	40.539		Minsheng–Xizhi line
Y36	Songshan 松山			Songshan		1.685	42.224		Songshan–Xindian line Western Trunk line
Y37	Yongchun 永春			Xinyi		0.825	43.049		Bannan line
Y38	Xiangshan 象山					1.790	44.839		Tamsui–Xinyi line
Y39	Unreleased		Split			1.000	45.839		—N/a
Continue with Taipei Zoo station
References: [21]: 3–30 [22]: 9-24~9-65 [23]: 9-21~9-40

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