South Korea's KTX: Compact Country, Fast Trains

Small Country, Big Ambitions

South Korea might be smaller than Portugal in land area, but it hosts one of Asia's most impressive high-speed rail networks. The KTX (Korea Train Express) launched on 1 April 2004, connecting Seoul to Busan — a distance of 422 km — in just 2 hours 40 minutes at launch, subsequently reduced to 2 hours 15 minutes on the fastest services. The journey by the previous express train (Saemaeul) took 4h10.

South Korea's decision to build a high-speed network came after a 1991 feasibility study concluded that the existing railway between Seoul and Busan — the country's two largest cities and its economic heartland — was approaching saturation. After evaluating multiple technologies, Korea licensed French TGV technology from Alstom, with a commitment to localise manufacture over time. The original KTX trains are essentially TGV-derived, but Korean engineers systematically developed domestic expertise through the programme.

Rolling Stock: KTX, KTX-Sanjeon, and KTX-Eum

Original KTX (2004)

The first-generation KTX trains are TGV Réseau derivatives, with articulated coaches sharing bogies between cars (a French design feature that improves stability but makes gangways narrower). Korea operated 46 of these trainsets. They are being phased out as newer domestic designs enter service.

KTX-Sanjeon (2010)

Developed entirely by Korean engineers at Hyundai Rotem, the KTX-Sanjeon broke from the TGV's articulated design in favour of independently bogied coaches — easier to maintain and more flexible in configuration. Top speed: 305 km/h. The name means "mountain bird." This is the most common KTX variant today and serves the majority of KTX routes.

KTX-Eum (2021)

Korea's latest and most capable train, with a top speed of 320 km/h, electric multiple unit (EMU) distributed traction, and improved passenger amenities. The KTX-Eum (meaning "sound" — an aural metaphor for its whisper-quiet operation) serves the Gyeonggang Line to the Gangwon region and is being deployed on additional routes. Its shorter 8-car configuration makes it suitable for regional corridors where full 20-car KTX Sanjeon sets would be excessive.

The KTX Network

Korea's high-speed network has expanded significantly since 2004 and now covers most of the peninsula's major population centres:

The Seoul–Gangneung line gained international recognition when it carried athletes and spectators to the 2018 PyeongChang Winter Olympics — the KTX-Eum's predecessor on that route made it the first high-speed rail service to a Winter Olympics venue.

SRT: The Competing Operator

Korea liberalised its HSR market partially in December 2016, when SR (Super Rail) launched SRT (Super Rapid Train) services from the newly opened Suseo Station in southern Seoul. SRT uses the same Gyeongbu HSR infrastructure as Korail's KTX south of Osong, but diverges to serve Suseo rather than Seoul Station — useful for passengers in southern Seoul and Bundang, who previously faced a long metro journey to Seoul Station.

SRT operates KTX-Sanjeon rolling stock and competes directly with Korail on Seoul(Suseo)–Busan and Seoul(Suseo)–Mokpo. Fares are broadly comparable. The existence of two operators on the same infrastructure has introduced modest competitive pressure without the dramatic price falls seen in Italy's fully open-access market.

Classes and Tickets

• Ilban-sil (General Class): Equivalent to second/economy class. Comfortable 2+2 seating. Fares for Seoul–Busan from approximately ₩59,800 (around $45/€41) at standard rates.
• Teuksil (First Class): 2+1 seating, wider seats, complimentary beverages. Fares approximately 30–40% higher than General Class.

Korail runs a Korail Pass specifically designed for foreign tourists, available in 2, 3, 4, and 5-day consecutive or flexible versions. A 3-day flexible Korail Pass (usable on any 3 days within 10) costs around $150/€135 and represents excellent value if visiting multiple cities. Crucially, the pass covers the fast KTX trains at no supplement. Book through the Korail English website (letskorail.com) or through authorised overseas agents before arriving in Korea.

Practical Travel Tips

The Korean train system is genuinely easy to navigate even without Korean language skills. Major stations post departure information in English and Chinese as well as Korean, and the Korail website (letskorail.com) has a well-functioning English-language interface. Arrive at the station at least 15 minutes before departure — unlike European systems, Korean trains board relatively quickly but the ticket gate process adds time at busy Seoul Station.

Convenience stores inside stations sell excellent kimbap (seaweed rice rolls), triangle sandwiches, hot tteokbokki (spicy rice cakes), and freshly prepared to-go meals. Bringing food on board is fully accepted. On-board vending machines offer drinks and packaged snacks. Mobile phone etiquette on KTX differs from Japan — passengers do make phone calls in Ordinary class (though quieter reserved zones exist on some trains), and noise levels reflect a more relaxed social norm around voice calls than the Shinkansen's strict prohibition.

The T-money transport card, used across Korean metro and bus systems, cannot be used for KTX tickets (tickets must be purchased in advance), but it is invaluable for onward travel from the arrival station. Major stations including Seoul, Busan, and Daejeon are directly integrated with the metro network, making the last-mile connection seamless.

KTX Stations Worth Knowing

Seoul Station is the primary KTX hub — large, well-serviced, with a shopping mall and a direct airport rail link to Incheon Airport (AREX express, 43 minutes). Busan Station sits in the heart of Korea's second city, within walking distance of the Jagalchi fish market and Chinatown. Daejeon Station is the key junction where the Gyeongbu (Seoul–Busan) and Honam (Seoul–Mokpo) lines divide. Gwangmyeong Station, on the Gyeongbu HSR just south of Seoul, serves the southern suburbs and is often overlooked by tourists who default to Seoul Station.

Korea's rail network is compact enough that with a 3 or 5-day Korail Pass, you can realistically cover Seoul, Gyeongju (the ancient Silla capital, accessible via KTX to Singyeongju), Busan, Mokpo (gateway to the Dadohae island archipelago), and Jeonju (famous for bibimbap) in a single trip — a rail itinerary that showcases the country's remarkable geographic and cultural diversity at genuinely high speed.

The Future: KTX Expansion and New Technology

Korea continues to invest in its high-speed network. Several new lines are under construction or in planning:

• KTX to Gwangju: The existing Honam HSR route to Gwangju Songjeong is being complemented by a new urban centre extension to reduce the taxi/bus leg into central Gwangju
• East-West HSR: A new line connecting the KTX network to the east coast cities of Pohang and Ulsan more directly, reducing travel times for the industrial southeast
• EMU-320 and beyond: Hyundai Rotem is developing the next KTX generation with distributed traction, a 320 km/h top speed, and improved energy recovery systems — building on the KTX-Eum architecture

Korea's HSR success story is often underappreciated in global discussions dominated by Japan, France, and China. Yet the Korean programme — delivered on a tight budget, with domestic technology largely displacing imported systems over two decades — offers perhaps the most replicable model for medium-income countries contemplating their first HSR investment. The combination of French technology transfer, deliberate localisation policy, and a geographically suitable corridor (two major cities, 400 km apart, on a peninsula too long to drive comfortably) is a template that several nations, including Morocco and India, have drawn on explicitly.

For visitors to Korea, the KTX is simply the best way to travel between the major cities. Reliable, clean, fast, and affordable — especially with the Korail Pass — it removes the stress of Korean highway traffic entirely and delivers you to the heart of each city in a fraction of the time of any alternative. Booking the Seoul–Busan Nonstop KTX (which skips intermediate stations and completes the journey in 2h15) for a first visit, then taking the slower Gyeongbu service back via Daejeon and Ulsan, gives a good sense of both the network's speed capability and its role in connecting the industrial and cultural cities of the peninsula.