Line 4 (Shanghai Metro)

Line 4
A view of the Yishan Road station.
Overview
Other name(s)	M4 (planned name); Pearl line phase II (Chinese: 明珠线二期); Loop line (Chinese: 环线)
Native name	上海地铁4号线
Status	Operational
Owner	Shanghai Rail Transit Pearl Line (Phase II) Development Co., Ltd. (except shared track with line 3 portion)
Locale	Huangpu, Xuhui, Changning, Putuo, Jing'an, Hongkou, Yangpu, and Pudong districts, Shanghai, China
Termini	Continuous loop from/to Yishan Road (terminal for trains to depot)
Stations	26 (of which 9 shared with line 3)
Service
Type	Rapid transit
System	Shanghai Metro
Operator(s)	Shanghai No. 3 Metro Operation Co. Ltd.
Depot(s)	Puhuitang Depot
Rolling stock	42 Class A 6-car trains
Daily ridership	976,000 (2019 Peak)[1]
History
Commenced	2001; 23 years ago (2001)
Opened	December 31, 2005; 18 years ago (2005-12-31)
Last extension	September 21, 2007; 17 years ago (2007-09-21)
Technical
Line length	33.7 km (20.9 mi) (of which 11.57 km (7.2 mi) shared with line 3)
Number of tracks	2
Character	Underground and elevated (shared track with line 3 portion)
Track gauge	1,435 mm (4 ft 8+1⁄2 in)
Electrification	Overhead lines (1500 volts DC)
Operating speed	80 km/h (50 mph) Average speed: 32.7 km/h (20 mph)
Signalling	ALSTOM/CASCO URBALISTM 200[2] (fixed block CBTC, current) CASCO Qiji TACS (2025 exp.)[3]
Route map Route on the Shanghai map: To scale geographic map: Line 4, Shanghai Metro v t e Legend Direct connection Shanghai public transport card only, re-entry required  10  Hongqiao Road  3   10   3   9  Yishan Road West Yan'an Road  3   9  Zhongshan Park  2   3   3  to Shanghai South Railway Station  2  Suzhou Creek Puhuitang Depot Jinshajiang Road  3   13  Caoyang Road  3   11   14   14   1  Shanghai Indoor Stadium Zhenping Road  3   7  Shanghai Stadium Zhongtan Road  3   7  Dong'an Road Jinghu Railway (Beijing–Shanghai)  12  Damuqiao Road Shanghai Railway Station  1   3  Luban Road  1   8  South Xizang Road  8  Nanpu Bridge Baoshan Road  3  Huangpu River  3  to North Jiangyang Road Tangqiao  6  Hailun Road  10   6  Lancun Road Linping Road Pudian Road Dalian Road  12   9  Yangshupu Road  2  Huangpu River  2   6   9  Century Avenue Pudong Avenue  14   6

Line 4 is a loop line of the Shanghai Metro network. Its older rolling stock carry a bright purple colour belt to differentiate them from Line 3 trains which share a portion of its route, while the newer stock features a yellow and purple livery, which the exact line is labelled using sticker or screens saying "Line 3" or "Line 4". To determine the direction of travel, the line that travels counter-clockwise is called the Outer Loop (外环), while the other line is known as the Inner Loop (内环). Although it is a loop line, trains returning to the depot use Yishan Road as a terminal to let all passengers disembark. The first segment of the line between Damuqiao Road and Lancun Road (running in a "C"-shape) opened on December 31, 2005. The remainder of the line opened on December 29, 2007. The line is colored purple on system maps.