Line 4 (Shanghai Metro)

Template:Short description Template:Infobox rail line Line 4 is a loop line of the Shanghai Metro network. The older rolling stock 04A01 carry a bright purple colour belt to differentiate them from Line 3 trains which share a portion of its route, while the newer 04A02 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 (), while the other line is known as the Inner Loop (). Although it is a loop line, trains returning to the depot use Template:Stl as a terminal to let all passengers disembark. The first segment of the line between Template:Stl and Template:Stl (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.

History

colspan="7" style="text-align: center" bgcolor=#Template:Rcr | Shanghai metro line 4 opening history
Segment	Commencement	Opened	Length	Station(s)	Name	Investment
Damuqiao Road — Hongqiao Road	26 Dec 2000	31 Dec 2005	Template:Convert	5	Pearl Line (second phase)	¥12.6 billion
Hongqiao Road — Baoshan Road			Template:Convert (tracks sharing)	9	Line 3 & 4 realignment project
Baoshan Road — Lancun Road			Template:Convert	8	Pearl Line (second phase)
Lancun Road — Damuqiao Road	22 Oct 2005	29 Dec 2007	Template:Convert	4	Loop line connector project

The line became China's first national "Worker Pioneer" metro line on the 11th October, 2009.

Construction accident

On August 20, 2001, on 20.10 at Template:Stl construction site during excavating the foundation pit, earthmoving sudden landslide, killing four people died who were buried in the landslide.

At 4 o'clock in the morning on July 1, 2003, the Pudongnan Road-Nanpu Bridge section of Line 4 suddenly saw water seepage during the construction of the connecting passage between the upper and lower tunnels. After that, a large amount of quicksand poured into the tunnel, causing internal and external pressure imbalance, which caused partial collapse of the tunnel. It has a funnel-shaped settlement. At 9 o'clock in the morning, the podium of a nearby building on South Zhongshan Road collapsed; beginning in the early morning of the July 2, the flood wall of Dongjiadu Waima Road section began to sink and crack due to the settlement. The embankment collapsed in a serious accident. The Linjiang Garden Building near the scene also experienced subsidence, the most serious settlement exceeded Template:Convert in an hour, and the cumulative settlement reached Template:Convert. This incident affected the plan for the opening of the entire line of Line 4. In August 2004, the Dongjiadu section restoration project was started and it was restored with the opening of the second section in July 2007. On November 5, 2004, the Shanghai Second Intermediate People's Court issued a judgement on the deputy project manager of the subcontractor for the construction of the intermediate air shaft and side channel freezing method. The court convicted him for the crime of a major liability accident which has a fixed-term imprisonment of two years and six months and a probation of three years. The project director representative has a fixed-term imprisonment of six-month with a probation period of two years. The general contractor's project manager for two years with a fixed-term imprisonment of one year and six months.

At Template:Stl unbalanced subsidence was discovered. From January 22 to January 28, 2012, it was closed for an overhaul.

Stations

Service routes

colspan="12" style="text-align: center" bgcolor=#Template:Rcr | Shanghai metro line 4 service routes
M - Mainline: Full Loop P - Partial Mainline: Template:Stl ↔ Template:Stl
Routes		Station name		rowspan="2" style="text-align:center; background:#Template:Rcr;"| Template:Rint	Connections	Distance			Location	Open- ing	Plat- form
M	P	English	Chinese	km		min
— ↑ Loop line towards Template:Stl (Outer Loop) ↑ —						1.14	1.14	3
●	●	Template:Stl	Template:Large		Template:RintTemplate:Efn-lr Template:Rint	0.00	0.00	0	Xuhui	31 Dec 2005	Underground Island
●		Template:Stl	Template:Large	style="text-align:center; background:#Template:Rcr;"|●	Template:Rint	1.37	1.37	3	Changning		Elevated Side
●		Template:Stl	Template:Large	style="text-align:center; background:#Template:Rcr;"|●	Template:Rint Yan'an BRT	1.41	2.78	5
●		Template:Stl	Template:Large	style="text-align:center; background:#Template:Rcr;"|●	Template:Rint	0.96	3.74	7			Elevated Island
●		Template:Stl	Template:Large	style="text-align:center; background:#Template:Rcr;"|●	Template:Rint	1.66	5.40	10	Putuo		Elevated Side
●		Template:Stl	Template:Large	style="text-align:center; background:#Template:Rcr;"|●	Template:Rint Template:RintTemplate:Efn-lr	0.90	6.30	12
●		Template:Stl	Template:Large	style="text-align:center; background:#Template:Rcr;"|●	Template:Rint	1.40	7.70	14
●		Template:Stl	Template:Large	style="text-align:center; background:#Template:Rcr;"|●		1.44	9.14	17
●		Template:Stl	Template:Large	style="text-align:center; background:#Template:Rcr;"|●	Template:RintTemplate:Efn-lr Template:Rint Template:Rint SHH	1.72	10.86	19	Jing'an		At-grade Island
●		Template:Stl	Template:Large	style="text-align:center; background:#Template:Rcr;"|●		2.03	12.89	23			Elevated Side
●		Template:Stl	Template:Large		Template:Rint	1.51	14.40	26	Hongkou		Underground Island
●	Template:Resize	Template:Stl	Template:Large			1.07	15.47	28			Underground Island & Side
●	●	Template:Stl	Template:Large		Template:Rint	1.40	16.87	30	Yangpu		Underground Island
●	●	Template:Stl	Template:Large			0.72	17.59	32
●	●	Template:Stl	Template:Large		Template:Rint	1.44	19.03	35	Pudong
●	●	Template:Stl	Template:Large		Template:Rint Template:Rint Template:Rint	1.43	20.46	37
●	●	Template:StlTemplate:Efn-lr	Template:Large			0.85	21.31	39
●	●	Template:Stl	Template:Large		Template:Rint	1.34	22.65	41
●	●	Template:Stl	Template:Large			1.21	23.86	44		29 Dec 2007
●	●	Template:Stl	Template:Large			2.13	25.99	47	Huangpu		Underground Split
●	●	Template:Stl	Template:Large		Template:Rint	1.22	27.21	49			Underground Island
●	●	Template:Stl	Template:Large			1.47	28.68	51
●	●	Template:Stl	Template:Large		Template:Rint	1.19	29.87	53	Xuhui	31 Dec 2005
●	●	Template:Stl	Template:Large		Template:Rint	0.62	30.49	55
●	●	Template:Stl	Template:Large			1.51	32.00	57
●	●	Template:Stl	Template:Large		Template:Rint	0.67	32.67	59
— ↓ Loop line towards Yishan Road (Inner Loop) ↓ —						1.14	33.81	62
Template:Notelist-lr

Important stations

• Template:Stl: Interchange with line 3. To transfer to line 1, passengers need to exit through a tunnel inside Shanghai railway station and purchase a ticket to re-enter the station.
• Template:Stl: Interchange with lines 2 and 3.
• Template:Stl: Interchange with lines 2, 6 and 9. It is Shanghai's first 4-line interchange station.
• Template:Stl: The first platform-to-platform interchange station in the Shanghai Metro network. Interchange with line 8.
• Template:Stl: Serves Shanghai Stadium.
• Template:Stl: Serves the sports stadium of the same name and the biggest regional and interregional bus station in the city. Interchange with line 1.
• Template:Stl: Serves East China Normal University. Interchange with lines 3 and 13.
• Template:Stl: Serves Donghua University.

Station name change

• On 28 October 2006, Dongfang Road was renamed as the Template:Stl after station renovation for line 2 and the opening of line 4.

Headways

colspan="4" style="text-align: center" bgcolor=#Template:Rcr | Shanghai Metro Line 4 headway
Time		Inner Loop (running clockwise)	Outer Loop (running counterclockwise)
Monday - Friday (Working Days)
AM peak	7:00–9:00	Template:Stl → Template:Stl → Template:Stl: About 3 min and 10 sec Template:Stl → shared track w/ Template:Rint → Template:Stl: About 3 min and 45 sec	Template:Stl - Template:Stl - Template:Stl: About 5 min and 30 min; Template:Stl - shared track w/ Template:Rint - Template:Stl: About 7 min and 30 sec
Off-peak	9:00–17:00	About 8 min
PM peak	17:00–19:30	About 5 min
Other hours	Before 7:00 After 19:30	About 5 - 12 min
Saturday and Sunday (Weekends)
Peak	7:00–21:00	About 6 min and 30 sec
Other hours	Before 7:00 After 21:00	About 5 - 12 min

Technology

Signaling

Line 4 has been operating over capacity due to large passenger flows for a number of years. With the continuous extensions of operating time, the problems of aging equipment and increasing passenger demand will further increase the operating pressure of the two lines. In June 2021 it was announced that Shanghai Metro has started to update of the signal system and finish before December 31, 2024. These are the last lines in the system that are equipped with fixed block Alstom URBALISTM 200 system, not equipped with CBTC systems capable of headways as low as 90 seconds. CASCO successfully won the bid for the renewal and transformation of the signaling using Qiji TACS system.

Rolling Stock

The line operates with 6-car Class A trains.Template:Efn-lr

colspan="9" style="text-align: center" bgcolor="#Template:Rcr" | Shanghai Metro Line 4 rolling stock
Fleet numbers	Manufacturer	Time of manufacturing	Class	No of car	AssemblyTemplate:Efn-lr	Rolling stock	Number	Notes
168	Siemens (0401,0402) CRRC Zhuzhou Locomotive Co., Ltd. (0403–0428)	2004-2007	A	6	Tc+Mp+M+M+Mp+Tc	04A01	0401-0428 (040011-041681)	Original name: AC05. In February 2009, 8 trains used on line 2 (numbers: 0225-0232) returned to line 4.
162	SATCOTemplate:Efn-lr (0430–0455) CRRC Changchun Railway Vehicles Co., Ltd. (0429)	2014-2017	A	6	Tc+Mp+M+M+Mp+Tc	04A02	0429-0455 (041691-043301)	13 trains (042171-042941, trainset 0437-0449) have been assigned to line 3.
Template:Notelist-lr

• 04A01 train
  04A01 train
• 04A02 train
  04A02 train