}}}}
Loop line (Line 0) The Loop line (coded as "Line 0") is a rapid transit
loop line. The northeastern section was opened on 28 December 2018. The southern section with the
Egongyan Rail Transit Bridge opened on 30 December 2019. Three major railway stations in Chongqing are also linked by this line:
Chongqing North railway station,
Shapingba railway station, and
Chongqing West railway station. Loop Line's color is
yellow.
Line 1 Line 1 runs from Chaotianmen, in the central west, to Shapingba and then to Bishan with a total length of . It is the first
heavy-rail subway line in Chongqing and the second in Western China. The passenger capacity is 36,000 passengers per hour in each way. The line serves as the system's backbone connecting the densest areas including the main Central Business Districts of
Jiefangbei, Lianglukou, Daping, and Shapingba. It is the first conventional subway, running in a deep-bored tunnel below Yuzhong and Shapingba Districts. Line 1 has transfer interchange stations with
Line 6 at
Xiaoshizi and
Line 2 at
Jiaochangkou in Jiefangbei CBD and at
Daping and
Line 3 at
Lianglukou, which is near
Chongqing railway station in central Yuzhong. Line 1 is also transferable with the
Loop Line at
Shapingba, although out-of-station transfer is currently needed due to construction setbacks on the interchange channel and concourse connecting the two subway lines. In 1992, the Chongqing government signed a
Build-Operate-Transfer agreement with a Hong Kong company and provided the land for the project, but work ceased in 1997 because of legal issues.
Thales provided an
operations control centre for the line. Line 1's color is
red.
Line 2 , Line 2 Line 2, a
monorail line, runs and has 25 stations. It begins as a subway under downtown Jiefangbei, then runs west along the southern bank of
Jialing River on an elevated line, and then turns south into the southwestern inner suburbs, looping back east, to terminate at Yudong, in
Ba'nan District. It runs mostly elevated, but a section is underground, including three of its 18 stations in the
Jiefangbei CBD and central Daping areas in the extremely-dense area of Yuzhong District.
Line 2 runs through four administrative districts in the central city (
Yuzhong,
Jiulongpo,
Dadukou, and
Ba'nan). In 2010, Line 2 served 45 million passengers. It also runs through Daping CBD, Yangjiaping CBD in Jiulongpo District, and Chongqing Zoo at. Most trains have four cars, and six-car trains began to operate in September 2012. Line 2 is the first rapid transit line to open in the Interior West of China, in 2005. In 2013, six-car trains are being implemented because of overcrowding and increasing demand. Line 2's color is
green.
Liziba station on Line 2 has become a tourist attraction for its distinctive design, with trains running through the sixth to eighth floors of a residential building. A southern extension, from Ertang to Yudong, opened on 28 December 2012. Most trains have six cars, more than on the older Line 2. The line started to equip eight-car trains in 2014, which are now in operation. There are interchange stations in the Yuzhong district with Line 1, at Lianglukou (Caiyuanba Intercity Railway/Coach Station), and with Line 2, at . Line 3's color is
indigo.
Line 4 Line 4 is a rapid transit line. In June 2018, debugging of the first segment of Phase I commenced. The line began operating on 28 December that year. Line 4's color is
orange. The Western extension from
Shimahelijiao to
Jiazhoulu opened on 10 February 2026 at 2:00 pm (Shimahelijiao to Shunshuisi Park not opened).
Line 5 Line 5 is a northeast–southwest heavy-rail line crossing the centre, and the line has opened its northern and southern sections of phase 1 and northern extension. It will connect Yubei, Jiangbei, Yuzhong, Jiulongpo, Shapingba and Dadukou districts. New six-car trains were introduced on the line. Line 5's color is
light blue.
Line 6 Line 6 is the second heavy-rail subway line of Chongqing. Opened on 28 September 2012, it connects
Nan'an,
Yuzhong,
Jiangbei and
Yubei districts in central Chongqing. The line features the
Caijia Rail Transit Bridge, the highest metro-only brige in the world, on which it crosses the
Jialing River. A 5 station, long northern branch from
Lijia to
Beibei, in
the district of the same name, was opened on 31 December 2013. The line was extended to
Chayuan in 2014. A branch to
Shaheba, known as the International Expo branch, was opened in 2020.
Thales provided an
operations control centre for the line. Line 6's color is
pink.
Line 9 The first phase of Line 9 opened on 25 January 2022. It connects
Huashigou in
Yubei District to
Gaotanyan in
Shapingba District. The line's route also serves
Yuzhong District and
Jiangbei District. Line 9 crosses the
Jialing River on a bridge parallel to . It also features the deepest
metro station in the world,
Hongyancun station, at 116 meters deep. Line 9's colour is
crimson.
Line 10 The line serves
the North Railway station and the airport terminals. The first phase (Liyuchi to Wangjiazhuang) opened on 28 December 2017, and the second phase will connect Yuzhong and Nan'an districts by crossing the Jialing and the Yangtze rivers. Two new bridges, Zengjiayan Jialing River Bridge and Nanjimen Rail Transit Bridge, are under construction for train services to the south. Line 10's color is
purple.
Line 18 Opened in 2023, Line 18 connects in
Dadukou District to
Fuhualu in
Yuzhong District. The line crosses the
Yangtze river on a 660-meter span cable-stayed bridge. The line's second phase, currently under construction, is projected to cross
Yuzhong District and terminate at
Xiaoshizi. Line 18's color is
turquoise.
Jiangtiao line The Jiangtiao line is a suburban
rapid transit line connecting
Jiangjin District with the metropolitan area at
Tiaodeng. There is
through service between
Line 5 and the Jiangtiao line since 2023. Jiangtiao line's color is
blue.
Bitong line The Bitong line is a suburban
rapid transit line connecting
Tongliang District with the metropolitan area at
Bishan. There will be
through service between
Line 27 and the Bitong line in the future. == Ticketing ==