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Suseo–Pyeongtaek high-speed railway
Suseo–Pyeongtaek high-speed railway
	Tracks at PyeongtaekJije Station
Overview
Other name(s)	Suseo HSR
Status	Operational
Owner	Korea Rail Network Authority
Line number	103 (Korea Rail Network Authority)
Locale	South Korea
Termini	Suseo; PyeongtaekJije;
Stations	3
Service
Type	High-speed rail
Operator(s)	SR Corporation
Rolling stock	KTX-Sancheon Class 120000; KTX-Sancheon Class 130000;
History
Opened	9 December 2016
Technical
Line length	61.1 km (38.0 mi)
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification	25 kV/60 Hz overhead catenary
Operating speed	305 km/h (190 mph)
Korean name
Hangul	수서평택고속선
Hanja	水西平澤高速線
Revised Romanization	Suseo Pyeongtaek Gosokseon
McCune–Reischauer	Susŏ P'yŏngt'aek Kosoksŏn
map_name
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The Suseo–Pyeongtaek high-speed railway (formerly known as Sudogwon HSR Line),^[1] 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.^[2] 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.^[2] However, in plans made official in August 2006,^[3] the Suseo branch was no longer included.^[2]

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.^[4]

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.^[4] 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.^[4] The travel time from Suseo to Dongtan was foreseen to be 12 minutes.^[4] The target date for finishing the line was later moved ahead to 2014.^[5]

The basic design was completed on April 28, 2010.^[6] The planned length of the line changed to 61.1 km (38.0 mi), and planned stations reduced to two, at Suseo and Dongtan.^[6] The government set out a timeplan, according to which detailed design was to commence immediately, and construction was to take place from the second half of 2011 until the end of 2014.^[7] The first detailed design contracts were awarded in September 2010.^[8]

Once the line is completed, the expected travel time will be 1 hour 59 minutes from Suseo to Busan via the Gyeongbu HSR, and 1 hour 49 minutes from Suseo to Mokpo via the Honam HSR.^[8]

Longer term plans

On September 1, 2010, the South Korean government announced a strategic plan to reduce travel times from Seoul to 95% of the country to under two hours by 2020.^[9] As part of the plan, tracks for up to 230 km/h (143 mph) are to connect Suseo and Yongsan in central Seoul.^[9]

In November 2020, MOLIT announced extension of Suseo–Pyeongtaek high-speed railway to Uijeongbu. However, no completion date for the extension was announced.^[10]

Stations

List of stations on Suseo–Pyeongtaek high-speed railway^[11]
Station			Station distance	Line distance	Transfers	Location
English	Hangul	Hanja	km		Transfers	Location

Suseo	수서	水西	—	0.2		Seoul	Gangnam-gu
Dongtan	동탄	東灘	32.4	32.6	—	Gyeonggi-do	Hwaseong-si
PyeongtaekJije	평택지제	平澤芝制	21.0	53.6		Gyeonggi-do	Pyeongtaek-si

↓ Through-service to/from Busan/Mokpo via Gyeongbu HSR/Honam HSR ↓