Line 4 (Shanghai Metro) Explained

Native Name:上海地铁4号线
Native Name Lang:zh
Other Name:M4 (planned name);
Pearl line phase II ;
Loop line
Type: Rapid transit
System: Shanghai Metro
Status:Operational
Locale:Huangpu, Xuhui, Changning, Putuo, Jing'an, Hongkou, Yangpu, and Pudong districts, Shanghai, China
Start:Continuous loop from/to (terminal for trains to depot)
Stations:26 (of which 9 shared with line 3)
Daily Ridership:976,000 (2019 Peak)[1]
Owner:Shanghai Rail Transit Pearl Line (Phase II) Development Co., Ltd. (except shared track with line 3 portion)
Operator:Shanghai No. 3 Metro Operation Co. Ltd.
Character:Underground and elevated (shared track with line 3 portion)
Depot:Puhuitang Depot
Stock:42 Class A 6-car trains
Linelength:33.71NaN1 (of which 11.571NaN1 shared with line 3)
Tracks:2
Signalling:ALSTOM/CASCO URBALISTM 200[2] (fixed block CBTC, current)
CASCO Qiji TACS (2025 exp.)[3]
Electrification:Overhead lines (1500 volts DC)
Speed:800NaN0
Average speed: 32.70NaN0

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 (Chinese: 外环), while the other line is known as the Inner Loop (Chinese: 内环). Although it is a loop line, trains returning to the depot use as a terminal to let all passengers disembark. The first segment of the line between and (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=#
SegmentCommencementOpenedLengthStation(s)NameInvestment
Damuqiao Road — Hongqiao Road26 Dec 200031 Dec 20053.942NaN25Pearl Line (second phase)¥12.6 billion
Hongqiao Road — Baoshan Road11.522NaN2
9Line 3 & 4 realignment project
Baoshan Road — Lancun Road9.762NaN28Pearl Line (second phase)
Lancun Road — Damuqiao Road22 Oct 200529 Dec 20078.72NaN24Loop 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 construction site during excavating the foundation pit, earthmoving sudden landslide, killing four people died who were buried in the landslide.[4]

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 7mm in an hour, and the cumulative settlement reached 15.6mm. 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.[5] 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.[6]

At unbalanced subsidence was discovered. From January 22 to January 28, 2012, it was closed for an overhaul.[7] [8]

Stations

Service routes

  • M - Mainline: Full Loop
  • P - Partial Mainline: ↔
— ↑ Loop line towards (Outer Loop) ↑ —1.141.143
0.000.000Xuhui31 Dec
2005[9]
Underground Island
1.371.373ChangningElevated Side
Yan'an BRT1.412.785
0.963.747Elevated Island
1.665.4010PutuoElevated Side
0.906.3012
1.407.7014
1.449.1417
1.7210.8619Jing'anAt-grade Island
2.0312.8923Elevated Side
1.5114.4026HongkouUnderground Island
1.0715.4728Underground Island & Side
1.4016.8730YangpuUnderground Island
0.7217.5932
1.4419.0335Pudong
1.4320.4637
0.8521.3139
1.3422.6541
1.2123.864429 Dec
2007[10]
2.1325.9947HuangpuUnderground Split
1.2227.2149Underground Island
1.4728.6851
1.1929.8753Xuhui31 Dec
2005
0.6230.4955
1.5132.0057
0.6732.6759
— ↓ Loop line towards Yishan Road (Inner Loop) ↓ —1.1433.8162

Important stations

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.

Interchange with lines 2 and 3.

Interchange with lines 2, 6 and 9. It is Shanghai's first 4-line interchange station.

The first platform-to-platform interchange station in the Shanghai Metro network. Interchange with line 8.

Serves Shanghai Stadium.

Serves the sports stadium of the same name and the biggest regional and interregional bus station in the city. Interchange with line 1.

Serves East China Normal University. Interchange with lines 3 and 13.

Serves Donghua University.

Future extensions

There are abandoned plans to end the shared tracks with line 3. Plans include a new underground track for line 4 on the northwestern past.

Station name change

Headways

Monday - Friday (Working Days)
7:00–9:00
→ → :
About 3 min and 10 sec
→ shared track w/ → :
About 3 min and 45 sec
- - :
About 5 min and 30 min;
- shared track w/ - :
About 7 min and 30 sec
Off-peak9:00–17:00About 7 min
PM peak17:00–19:30About 5 min
Other
hours
Before 7:00
After 19:30
About 5 - 12 min
Saturday and Sunday (Weekends)
Peak7:00–21:00About 6 min and 30 sec
Other
hours
About 5 - 12 min

Technology

Signaling

Lines 3 and 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 of lines 3 and 4 and finish before December 31, 2024.[11] 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 for lines 3 and 4 using its self-developed Qiji TACS system.[12]

Rolling Stock

The line operates with 6-car Class A trains.

Fleet numbers Manufacturer Time of manufacturing Class No
of
car
Assembly 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)
Line 4[13] Original name: AC05.
In February 2009, 8 trains used on line 2 (numbers: 0225-0232) returned to line 4.
162 SATCO (0430–0455)
CNR Changchun Railway Vehicles Co., Ltd. (0429)
2014-2017 A 6 Tc+Mp+M+M+Mp+Tc 04A02 0429-0455
(041691-043301)
Line 413 trains (042171-042941, trainset 0437-0449) have been assigned to line 3.

Notes and References

  1. Web site: Metro breaks records . 2019-03-09 . Shanghai Metro 163 Official . 2019-03-09 . zh .
  2. Web site: 用于上海地铁的URBALIS . alstom.com . July 31, 2003.
  3. Web site: Here Comes CASCO TRANAVI Qiji™ TACS! Shanghai Metro Line 3/4 will Soon Start the Upgrade of its Signaling System! . www.casco.com.cn . June 26, 2021.
  4. News: Wei . Zhou . Zhihong . Kou . 上海一建筑工地20日晚发生塌方事故 四人死亡 . sina.com.cn . August 21, 2001.
  5. https://web-archive-org.translate.goog/web/20150504032340/http://www.china.com.cn/chinese/2003/Jul/365477.htm?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=nl&_x_tr_pto=ajax,se,elem Shanghai's "Line 4 Accident" awakened the dream of 100 billion investment in China's metro.
  6. https://web.archive.org/web/20171222050749/http://www.criminallawbnu.cn/criminal/info/showpage.asp?pkID=14023 Shanghai Second Intermediate People's Court issued "(2004) Shanghai Second Middle School Punishment Chuzi No. 71 Criminal Judgment".
  7. https://web.archive.org/web/20171222052321/http://www.shmetro.com/node49/201201/con110821.htm The closure of Hailun Road Station on Line 4 during the Spring Festival will not affect Hailun Road Station on Line 10.
  8. https://web.archive.org/web/20171222052135/http://www.shmetro.com/node49/201201/con110864.htm The overhaul of Hailun Road Station on Line 4 will be completed on schedule and the first train will resume normal operation on the 29th.
  9. Web site: http://news.sina.com.cn/o/2006-01-01/09157871593s.shtml. zh:四号线开通 2万人尝鲜. 2006-01-01. Sina.
  10. Web site: http://news.sina.com.cn/o/2007-12-24/005313135562s.shtml. zh:上海轨交4号线29日环通. 2007-12-24. Sina.
  11. https://www.shine.cn/news/metro/2106281247/ Blueprint to bring Shanghai's New Cities closer
  12. https://www.casco.com.cn/news/detail.aspx?id=4042 CASCO Qiji™ TACS is on the stage, Shanghai Line 3/4 will start to upgrade the signal system!
  13. Web site: https://www.crrcgc.cc/zj/g1573/s4142/t61520.aspx. zh:上海市明珠二期轨道交通车辆 . zh . 2013-11-24. 2020-03-20.