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Chongqing Rail Transit
The Chongqing Rail Transit (branded as CRT; also known as Chongqing Metro) is the rapid transit system in the city of Chongqing, China. Opened in 2005, it is the world's 6th-largest metro system by length, at 574.12 km (357 mi), the largest monorail system, and holds the world records for the highest and deepest metro stations, both on the same line. The system serves all 8 central districts of the city as well as nearby suburbs. CRT consists of 12 heavy rail metro lines: 1, 4, 5, 6, 9, 10, 18, the Loop line, Jiangtiao line, and Bitong line, while Lines 2 and 3 are high-capacity heavy monorails.
As of April 2026, 5 new metro lines (7, 15, 17, 24, 27) and 4 extensions are under construction with a combined additional length of 210 km.
The Chongqing Rail Transit is uniquely shaped by the city’s steep, mountainous terrain and multiple river valleys carved by the Yangtze and Jialing rivers. Liziba station, a monorail station built inside a residential building, serves as one of its most iconic examples.
Two lines use heavy-monorail technology, leveraging the ability to negotiate steep grades and tight curves and rapid transit capacity. They are capable of transporting 32,000 passengers per hour per direction. However the busiest section of Line 3 reaches a peak passenger volume of 37,700 pphpd[clarification needed][clarification needed] in 2019. At 98 km (61 mi), the system's two monorail lines form the longest monorail system in the world, with Line 3 being the world's longest single monorail line. The length and the capacity of its monorail network both also make it the world's busiest monorail system, with a total of 94 million and 250 million rides in 2015 on Line 2 and Line 3, respectively. Line 3 is therefore the world's busiest single monorail line.
The extreme difference in elevation between the river valleys and the hilly plateaus of Chongqing poses a unique challenge in designing alignments for conventional rail transit lines. The network currently has the world's highest metro-only bridge, the Caijia Rail Transit Bridge of Line 6 spanning the Jialing River valley, with the bridge deck being approximately 100 m (328 ft) above the water. It holds the three deepest metro stations in China: Hongyancun (the deepest in the world), Hongtudi, and Liyuchi. While Hualongqiao, an elevated station where platforms are located 48 meters above ground, is the world's highest, surpassing Smith–Ninth Streets station in New York.
The Chongqing Rail Transit system possesses a number of extremely-long metro-only bridges. The 1,650 m (5,413 ft) long Egongyan Rail Transit Bridge carries the southern arc of the Loop line across the Yangtze River using a 600 m (1,969 ft) long suspension main span, making it the longest metro-only suspension bridge by main span in the world. The Nanjimen Bridge carries Line 10 trains across a 1,225 m (4,019 ft) cable-stayed bridge with a main span of 480 m (1,575 ft), making it the longest metro-only cable-stayed bridge by main span in the world. The Gaojia Huayuan Jialing River Rail Transit Bridge carries the western arc of the Loop line over the Jialing River using a long 594 m (1,949 ft) bridge with a main span of 340 m (1,115 ft). Additionally, Chongqing Rail Transit system has numerous double-deck bridges carrying vehicle and metro traffic, such as the Chaotianmen Bridge, which is the world's longest arch bridge.
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 runs 16.4 km (10.2 mi) from Chaotianmen, in the central west, to Shapingba and then to Bishan with a total length of 44.5 km (27.7 mi). 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.
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Chongqing Rail Transit
The Chongqing Rail Transit (branded as CRT; also known as Chongqing Metro) is the rapid transit system in the city of Chongqing, China. Opened in 2005, it is the world's 6th-largest metro system by length, at 574.12 km (357 mi), the largest monorail system, and holds the world records for the highest and deepest metro stations, both on the same line. The system serves all 8 central districts of the city as well as nearby suburbs. CRT consists of 12 heavy rail metro lines: 1, 4, 5, 6, 9, 10, 18, the Loop line, Jiangtiao line, and Bitong line, while Lines 2 and 3 are high-capacity heavy monorails.
As of April 2026, 5 new metro lines (7, 15, 17, 24, 27) and 4 extensions are under construction with a combined additional length of 210 km.
The Chongqing Rail Transit is uniquely shaped by the city’s steep, mountainous terrain and multiple river valleys carved by the Yangtze and Jialing rivers. Liziba station, a monorail station built inside a residential building, serves as one of its most iconic examples.
Two lines use heavy-monorail technology, leveraging the ability to negotiate steep grades and tight curves and rapid transit capacity. They are capable of transporting 32,000 passengers per hour per direction. However the busiest section of Line 3 reaches a peak passenger volume of 37,700 pphpd[clarification needed][clarification needed] in 2019. At 98 km (61 mi), the system's two monorail lines form the longest monorail system in the world, with Line 3 being the world's longest single monorail line. The length and the capacity of its monorail network both also make it the world's busiest monorail system, with a total of 94 million and 250 million rides in 2015 on Line 2 and Line 3, respectively. Line 3 is therefore the world's busiest single monorail line.
The extreme difference in elevation between the river valleys and the hilly plateaus of Chongqing poses a unique challenge in designing alignments for conventional rail transit lines. The network currently has the world's highest metro-only bridge, the Caijia Rail Transit Bridge of Line 6 spanning the Jialing River valley, with the bridge deck being approximately 100 m (328 ft) above the water. It holds the three deepest metro stations in China: Hongyancun (the deepest in the world), Hongtudi, and Liyuchi. While Hualongqiao, an elevated station where platforms are located 48 meters above ground, is the world's highest, surpassing Smith–Ninth Streets station in New York.
The Chongqing Rail Transit system possesses a number of extremely-long metro-only bridges. The 1,650 m (5,413 ft) long Egongyan Rail Transit Bridge carries the southern arc of the Loop line across the Yangtze River using a 600 m (1,969 ft) long suspension main span, making it the longest metro-only suspension bridge by main span in the world. The Nanjimen Bridge carries Line 10 trains across a 1,225 m (4,019 ft) cable-stayed bridge with a main span of 480 m (1,575 ft), making it the longest metro-only cable-stayed bridge by main span in the world. The Gaojia Huayuan Jialing River Rail Transit Bridge carries the western arc of the Loop line over the Jialing River using a long 594 m (1,949 ft) bridge with a main span of 340 m (1,115 ft). Additionally, Chongqing Rail Transit system has numerous double-deck bridges carrying vehicle and metro traffic, such as the Chaotianmen Bridge, which is the world's longest arch bridge.
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 runs 16.4 km (10.2 mi) from Chaotianmen, in the central west, to Shapingba and then to Bishan with a total length of 44.5 km (27.7 mi). 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.