Seoul Metropolitan Subway

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Seoul Metropolitan Subway
Seoul Metro 2000 series train on Line 2
Overview
Native name	수도권 전철 / 首都圈電鐵 Romanizations see box below
Owner	Government of South Korea, Seoul Metropolitan Government, Incheon Metropolitan City, Bucheon City, Uijeongbu City, Yongin City
Locale	Seoul Capital Area
Transit type	Rapid transit, Commuter rail
Number of lines	23
Number of stations	768
Annual ridership	1.91 billion (2017, Lines 1-9, Seoul Subway)[1] 1.16 billion (2017, Korail)[2]
Operation
Began operation	15 August 1974; 49 years ago (1974-08-15)
Operator(s)	Seoul Metro, Korail, Incheon Transit Corporation, and private rapid transit operators
Technical
System length	1,302.2 km (809.1 mi) (all lines)
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
System map

The Seoul Metropolitan Subway (Korean: 수도권 전철) is a metropolitan railway system consisting of 23 rapid transit, light metro, commuter rail and people mover lines located in northwest South Korea. The system serves most of the Seoul Metropolitan Area including the Incheon metropolis and satellite cities in Gyeonggi province. Some regional lines in the network stretch out beyond the Seoul Metropolitan Area to rural areas in northern Chungnam province and western Gangwon Province, that lie over 100 km (62 mi) away from the capital.^[3]

The network consists of multiple systems that form a larger, coherent system. These being the Seoul Metro proper, consisting of Seoul Metro lines 1 through 9 and certain light rail lines, that serves Seoul city proper and its surroundings; Korail regional rail lines, which serve the greater metropolitan region and beyond; Incheon Metro lines, operated by Incheon Transit Corporation, that serve Incheon city proper; and miscellaneous light rail lines, such as Gimpo Goldline and Yongin Everline, that connect lower-density areas of their respective cities to the rest of the network.^[4] Most of the system is operated by three companies – Seoul Metro, Korail (Korea Railroad Corporation), and Incheon Metro - with the rest being operated by an assortment of local municipal corporations and private rail companies.

Its first metro line, Line 1, started construction in 1971 and began operations in 1974, with through-operation to Korail's suburban railways. As of 2022, the network has 331.5 km (206.0 mi) of track on lines 1–9 alone.

Most of the trains were built by Hyundai Rotem, South Korea's leading train manufacturer.