Line 2 is an east–west line in the Shanghai Metro network. With a length of nearly 64 km (40 mi), it is the second longest line in the metro system after line 11. Line 2 runs from East Xujing in the west to Pudong International Airport in the east, passing Hongqiao Airport, the Huangpu river, and the Lujiazui Financial District in Pudong. With a daily ridership of over 1.9 million, it is the busiest line on the Shanghai Metro. The eastern portion of the line, from Guanglan Road to Pudong International Airport, was operated almost independently from the main segment until April 19, 2019, when through service began. The line is colored light green on system maps.
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 opened on December 31, 2005. The remainder of the line opened on December 29, 2007. The line is colored purple on system maps.
Line 6 is an eastern north–south line of the Shanghai Metro network. It opened on December 29, 2007. The entire line is located in the Pudong New Area. A complete trip between the two end terminals, Gangcheng Road and Oriental Sports Center takes approximately 1 hour and 10 minutes. Line 6 has been dubbed the unofficial nickname “Hello Kitty Line” due to its lurid pink livery. The line is colored magenta on system maps.
Guilin Road is an interchange station between Line 9 and Line 15 of the Shanghai Metro.
Middle Yanggao Road is a station on Line 9 of the Shanghai Metro. It is located at the intersection of Middle Yanggao Road and Minsheng Road in the city's Pudong New Area. It served as the eastern terminus of the line from its opening on 7 April 2010, until 30 December 2017, when an eastern extension of Line 9 opened, extending the line further east to Caolu.
Hongqiao Railway Station is a Shanghai Metro station located within the Shanghai Hongqiao railway station complex in the city's Minhang District. As part of a major transportation hub, it serves as an interchange between Lines 2, 10, and 17. It additionally serves as the western terminus the mainline service of Line 10, as well as the eastern terminus of Line 17. The station first opened as a Line 2 station on 1 July 2010, with Line 10 operations commencing on 30 November 2010. More than seven years later, Line 17 service was introduced with the opening of that line on 30 December 2017. With three island platforms totaling six platforms, the station is one of the largest in the system and features a cross-platform interchange between Lines 2 and 17.
Line 7 is a northwest–southeast line of the Shanghai Metro network. It connects the Baoshan District of Shanghai with the downtown core as well as the Pudong New Area and the Expo 2010 site. It currently runs from Meilan Lake in Baoshan District to Huamu Road in Pudong, which is near Shanghai New International Expo Center. Qihua Road serves as a terminus for trains returning to Chentai Road depot. The line is colored orange on system maps.
Line 10 is a southwest–northeast line of the Shanghai Metro network that opened for service on April 10, 2010. The line runs from Jilong Road to Hongqiao Railway Station, with a branch line from Longxi Road to Hangzhong Road. It has been given the unofficial nickname “Golden Line” as it links many of the city's tourist attractions like Yuyuan and Xintiandi. It connects the Hongqiao International Airport with the downtown core of Shanghai, and also the dense residential districts of Yangpu and Hongkou. It is the only line in the system with numbered station codes. It is the first high-density and high-volume fully automatic subway line in Mainland China, operating with GoA4 unattended train operation. The line is colored lilac on system maps.
Line 11 is a northwest–southeast line of the Shanghai Metro network. Since October 2013, Line 11 serves Kunshan city, making it is the second intercity metro in China after the Guangfo Metro and the first that crosses a provincial boundary. With a single-line mileage of 82.386 kilometres (51.192 mi), it is the second-longest single-line subway line in China, after Line 6 in Chongqing, which is 85.6 km (53.2 mi) long. The line is colored brown on system maps.
Line 12 is an east–west line of the Shanghai Metro network. It runs from Jinhai Road in Pudong to Qixin Road in Minhang District. The first section from Tiantong Road to Jinhai Road opened on 29 December 2013, and additional stations up to Qufu Road were in operation by 10 May 2014. The remaining stations opened on 19 December 2015. Since the opening of the extension in December 2015, Line 12 has the most interchanges with other metro lines in the Shanghai Metro. The line is colored forest green on system maps.
Line 13 is a north-west to south-east line of the Shanghai Metro network. It runs between Jinyun Road in Jiading and Zhangjiang Road in Pudong. It was once used as a dedicated line for the World Expo to serve the 2010 Shanghai World Expo. The line is colored pink on system maps.
Line 14 of the Shanghai Metro is an east-west metro line opened on 30 December 2021. The line, consisting of 31 stations, starts from Fengbang town in Jiading District, and terminate in Jinqiao town in Pudong New Area via Zhenru, Jing'an Temple, Dashijie, and Lujiazui. Its total length is 39.1 kilometres (24.3 mi), and passengers are able to transfer to 13 existing and planned metro lines. Due to Line 14 cutting across some of the densest areas of Shanghai and being a relief line for line 2, high ridership is expected for the line. As such the line uses high capacity 8 car A size trains similar to lines 1 and 2. The line uses an automatic train control system jointly developed by Thales and Shanghai Electric. Line 14 is fully driverless. The line is colored olive on system maps.
Line 15 of the Shanghai Metro is a north-south metro line in the city of Shanghai that opened on 23 January 2021. The line begins at Gucun Park in Baoshan District at its northern end, and terminates at Zizhu Hi-tech Park in Minhang District at its southern end, via Shanghai West Railway Station and Shanghai South Railway Station. It will be 42.3 kilometres (26.3 mi) in length and have 30 stations. The line is one of Shanghai Metro's new batch of high capacity fully automated and driverless lines along with Lines 14 and 18. The line is colored ivory on system maps.
Line 18 is a north–south Shanghai Metro line running from South Changjiang Road station in the city's Baoshan District to Hangtou station in Pudong, with a length of 36.13 km (22.45 mi). The line was originally scheduled to open by the end of 2020. However, officials announced that only the initial segment of eight stations in Pudong started test runs in September 2020. The 14.5 km (9.0 mi) southern section opened for passenger operations on December 26, 2020. The remainder of the line was opened on 30 December 2021. The line is 36.5 km (22.7 mi) long with 26 stations. The line is one of Shanghai Metro's new batch of high capacity fully automated and driverless lines along with Lines 14 and 15. The line is colored earth yellow on system maps.
Line 17 of the Shanghai Metro, formerly known as the Qingpu line, is an east-west rapid transit line that runs between Hongqiao Railway Station in Minhang District and Oriental Land in Qingpu District. All stations are fully accessible. It is 35.3 kilometres (21.9 mi) in length with 13 stations. The line entered passenger trial operations on 30 December 2017.
Line 16 is a rapid transit line serving the south-eastern suburban areas of Shanghai. The line was formerly known as the Lingang line. It was originally designated as Line 21 and was planned as the south part of line 11. The line runs entirely in Pudong New Area, starting from Longyang Road, via Shanghai Wild Animal Park, Huinan Town, ending at Dishui Lake in Nanhui New City. The line is 59 km (37 mi) long and has 13 stations of which three are underground and the rest elevated. Construction begun in early 2009, and the line opened on 29 December 2013. The second phase was completed at the end of 2014.
The Pujiang line of Shanghai Metro is an automated, driverless, rubber-tired Shanghai Metro line in the town of Pujiang in the Shanghainese district of Minhang. It was originally conceived as phase 3 of Shanghai Metro line 8, but afterwards was constructed as a separate line, connecting with line 8 at its southern terminus, Shendu Highway. The line opened for passenger trial operations on March 31, 2018. It is the first automated, driverless people mover line in the Shanghai Metro, and has 6 stations with a total length of 6.689 kilometres (4.156 mi). The people mover was expected to carry 73,000 passengers a day. The line is colored grey on system maps.
Songjiang South Railway Station is a metro station on Line 9 of the Shanghai Metro, and also serves as the line's southern terminus. It began operation on 30 December 2012. It is adjacent to Songjiang South railway station.
West Huajing is a metro station on the Line 15 of the Shanghai Metro. Located along an unbuilt section of Jinghong Road near its intersection with an unbuilt section of Huaji Road and straddling the boundary between Minhang and Xuhui districts in the city of Shanghai, the station was scheduled to open with the rest of Line 15 in 2020. However, the station eventually opened on 23 January 2021 following a one-month postponement. Half-Trains terminated here and trains would have to switch tracks to return to northbound track towards Gucun Park, until the south terminal station of short-route trains was extended to Shuangbai Road station.
Rapid transit 
Shanghai Metro 
