Line 4, Shanghai Metro

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Line 4 (四号线)

Statistics Type Rapid transit Locale Shanghai, China Termini No terminals; ring line, Yishan Road serves as terminal for trains returning to depot No. of stations 26 Operation Opened December 31, 2005 Operator(s) Shanghai No.3 Metro Operation Co. Ltd. Character Underground and elevated Technical Line length 33.7 km (20.94 mi) No. of tracks 2 Gauge 1,435 mm (4 ft 8+1⁄2 in) Electrification Overhead lines (1500 volts) Operating speed 80 km/h (50 mph)  Route diagram

v • d • e Shanghai Metro Line 4

Hongqiao Road Change to Line 3 Change to Line 3 (SPTCC only, re-entry required) Yishan Road   West Yan'an Road Change to Line 3 Change to Line 9 (SPTCC only, re-entry required)    Zhongshan Park Change to Line 3    Change to Line 2     Suzhou River Puhuitang Depot   Jinshajiang Road Change to Line 3    Caoyang Road Change to Line 3 Change to Line 1 Shanghai Indoor Stadium   Zhenping Road Change to Line 3 Shanghai Stadium   Zhongtan Road Change to Line 3 Dong'an Road    Jinghu Railway Damuqiao Road   Shanghai Railway Station Change to Line 3 Luban Road    Change to Line 1 (SPTCC only, re-entry required) Change to Line 8 South Xizang Road   Baoshan Road Change to Line 3 Nanpu Bridge    Huangpu River     Tangqiao   Hailun Road    Linping Road Change to Line 6 Lancun Road   Dalian Road Pudian Road   Yangshupu Road Change to Line 2 and Line 6 Century Avenue    Huangpu River    Pudong Avenue

Line 4 on the Shanghai Metro network is a loop line in the city of Shanghai. It follows the Inner Ring Road for most of the route, extending into Pudong across the Huangpu River. It shares the route from Baoshan Road to Hongqiao Road with the current Line 3.

Although this is a ring line, trains returning to the depot uses 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.

To determine the direction of travel, the line that travels anti-clockwise is named as the Outer Loop (外环), while the other line is known as Inner Loop (内环).

Construction problems

During construction of Line 4, part of the tunnel that was under construction close to the Huangpu River collapsed on July 1, 2003. This caused a six-storey building to collapse, and several other buildings in the neighborhood had to be evacuated. No casualties were reported, but the incident caused the completion of the metro line to be delayed for almost a year. Construction has been completed, and the section from Damuqiao Road to Lancun Road opened for operation December 29, 2007.

Important stations

• Shanghai Railway Station: Interchange with Line 3. To transfer to Line 1, passengers need to exit through a tunnel and purchase a ticket to re-enter the station.
• Zhongshan Park: Interchange with Line 2 and Line 3.
• Century Avenue: Interchange with Lines 2, 6 and 9. It is Shanghai's first 4-line interchange station.
• Xizang Road (South): The first platform-platform interchange station in the Shanghai Metro network. Interchange with Line 8.
• Shanghai Stadium: Serves Shanghai Stadium.
• Shanghai Indoor Stadium: Serves the sports stadium of the same name and the biggest regional and interregional bus station in the city. Interchange with Line 1.