Suseo–Pyeongtaek high-speed railway
track connecting Suseo station and PyeongtaekJije station in South Korea with a speed limit of 300km/h
The Suseo–Pyeongtaek high-speed railway (Korean: 수서평택고속선; formerly known as Sudogwon HSR Line), also known as Suseo–Pyeongtaek HSR, is a high-speed rail line from Suseo station in southeast Seoul to a junction with the existing Gyeongbu high-speed railway in South Korea. The line was built to ensure southeast Seoul (or Gangnam area) and southern Gyeonggi-do have high-speed rail connections.
History
Origins of the project
While South Korea's first high-speed line, the Gyeongbu high-speed railway (Gyeongbu HSR) was in construction between Seoul and Busan, the government considered a second line from Seoul to Mokpo, the Honam high-speed railway (Honam HSR). The first feasibility study in 2003 came to the conclusion that the construction of a full line is not justified by demand, and proposed a two-stage construction. The first stage, to be realised by 2015, would involve two branches from the Gyeongbu HSR, one of which would lead to a second Seoul terminus at Suseo in the southeast part of the city. However, in plans made official in August 2006, the Suseo branch was no longer included.
The Suseo branch was re-launched as a separate project, the Metropolitan Area high-speed railway (initially the Suseo high-speed railway), on June 1, 2008, to improve traffic connections to two new housing development areas situated along the line in Dongtan.
Planning stage
Preliminary plans foresaw a 60.7 km (37.7 mi) long line from Suseo to the junction with the Gyeongbu HSR near Pyeongtaek, and three new KTX stations at Suseo, Dongtan and Pyeongtaek, with the last one situated after the junction on the Gyeongbu HSR. The line was to run in a tunnel at a depth of 50 m (160 ft) between Suseo and Dongtan, and construction with a budget of 4.18 trillion South Korean won was foreseen to be complete in 2015. The travel time from Suseo to Dongtan was foreseen to be 12 minutes. The target date for finishing the line was later moved ahead to 2014.
The public source identifies “Suseo–Pyeongtaek high-speed railway” as track connecting Suseo station and PyeongtaekJije station in South Korea with a speed limit of 300km/h. This brief keeps that definition visible, then builds a research path around Suseo, Pyeongtaek and high-speed.
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Maps, plans, fabric surveys and administrative records can establish how the site’s name, extent and function changed over time. The source revision retrieved here is dated Sep 23, 2026. The linked authority identifier is Q3088068. None of the 1 selected statements returned an explicit reference. The first chronological checks are 2003, 2015, 2006 and 2008.
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This entry incorporates text from “Suseo–Pyeongtaek high-speed railway” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.