Jeolla Line: Connecting South Korea's Southwestern Provinces
The Jeolla Line (Korean: 전라선) is a vital heavy rail artery serving the North and South Jeolla Provinces of South Korea. Operating as a dual-purpose passenger and freight corridor, it provides essential connectivity between the inland hub of Iksan and the coastal destination of Yeosu Expo. Managed by Korail and owned by the Korea Rail Network Authority, the line is a cornerstone of regional mobility, linking the southwestern coast to the capital, Seoul, via the Gyeongbu and Honam Lines.
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Key Facts
- Total Length: 180.4 km (112.1 mi).
- Termini: Iksan to Yeosu Expo.
- Maximum Speed: 230 km/h (140 mph).
- Track Configuration: Double track from Iksan to Yeocheon; single track from Yeocheon to Yeosu Expo.
- Electrification: 25 kV 60 Hz AC overhead line.
- Gauge: 1,435 mm standard gauge.
Historical Development
The origins of the Jeolla Line date back to the early 20th century. The first precursor was the Zenboku Lightrail Line, a narrow-gauge (762 mm) railway opened on November 12, 1917, running from Riri to Zenshu. Following its nationalization in 1927, the Chosen Government Railway (Sentetsu) began converting the line to standard gauge (the international standard width between rails) in 1929.
Expansion continued through the 1930s, with sections reaching Jeonju in 1931, Namwon in 1933, and Suncheon by December 1936. The modern configuration was finalized in 1936 when the Suncheon–Yeosu section of the former Gwangnyeo Line was merged into the network, and the Iri (now Iksan) to Jeonju section was reconstructed in March 1937.
Modernization and Infrastructure Upgrades
To accommodate higher speeds and increased capacity, the Jeolla Line underwent several massive upgrade phases starting in the 1980s.
Realignment and Double-Tracking
In 1981, a bypass around Jeonju was opened to allow for wider curves. Between 1989 and 1999, the first phase of a major re-laying project introduced double-tracking and new alignments between Sin-ri and Suncheon. This phase included the construction of the 5,671 m Byeongpung Tunnel and the 6,128 m Seulchi Tunnel—the latter becoming South Korea's longest rail tunnel at the time. These improvements shortened the original route by 16.7 km.
A second phase completed between 2002 and 2004 further shortened the line by 11.4 km. The third phase, launched in 2002, focused on double-tracking the remaining 35.2 km from Iksan to Sin-ri and electrifying the section to Suncheon to support speeds of 180 km/h.
High-Speed Integration
The final stretch between Suncheon and Yeosu was upgraded as a separate project starting in 2003. By 2011, the entire upgrading project was slated for completion. Furthermore, as part of a 2010 government strategic plan to bring 95% of the country within two hours of Seoul, the Jeolla Line was targeted for further upgrades to support speeds of 230 km/h.
Route and Major Stations
The line consists of 30 stations, serving as a critical link for both regional commuters and long-distance travelers.
| Feature | Details |
|---|---|
| Total Distance | 180.4 km |
| Primary Operator | Korail |
| Key Junctions | Iksan (Honam/Janghang Lines), Suncheon (Gyeongjeon Line) |
| Major Cities | Jeonju, Suncheon, Yeosu |
| Electrification | 25 kV 60 Hz AC |
Key Stations
- Iksan: The northern terminus and a major junction for the Honam and Janghang Lines.
- Dongsan: The terminus for the Bukjeonju Line.
- Jeonju: The capital of North Jeolla Province.
- Suncheon: A critical junction connecting to the Gyeongjeon Line.
- Deogyang: The terminus for the Yeocheon Line.
- Yeosu Expo: The southern terminus on the coast.
Rail Services and KTX
The line is served by a variety of train types. ITX-Saemaeul provides faster intercity service, while Mugunghwa-ho trains offer more frequent stops for regional travel. For example, as of 2010, a Saemaeul-ho trip from Seoul's Yongsan station to Yeosu took approximately 5 hours and 15 minutes.
To coincide with the Expo 2012 hosted in Yeosu, Korail introduced Korea Train Express (KTX) services. Utilizing KTX-II (KTX-Sancheon) trains, these high-speed services significantly reduced travel times. Following the completion of the first stage of the Honam High Speed Railway, travel times from Seoul to Yeosu were projected to drop to approximately 2 hours and 25 minutes.
Frequently Asked Questions
What are the termini of the Jeolla Line?
The line runs from Iksan in the north to Yeosu Expo on the southern coast of South Korea.
Who operates the trains on the Jeolla Line?
The line is operated by Korail, while the infrastructure is owned by the Korea Rail Network Authority.
What is the maximum operating speed of the line?
The line is designed for a maximum operating speed of 230 km/h (140 mph).
Which high-speed trains serve this route?
The KTX-II (KTX-Sancheon) high-speed trains provide rapid service, particularly timed to support travel to Yeosu.
How has the route been shortened over time?
Through multiple phases of realignment and the construction of longer tunnels (such as the Seulchi and Byeongpung tunnels), the route was shortened by over 28 km between 1989 and 2004.