Busan Metro Line 4 Driverless Light Metro

🤖 AI-generated summary · 🔎 Last verified 2026-07-26

This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

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Korea's first unmanned metro is also its least-used: 29,295 riders a day in 2014, against 447,513 on Line 1. With nobody on board, a single fault stops everything — 1 hour 40 minutes of it in January 2025.

Outcome🔄 Ongoing

Evidence📰 Media

what does this mean?

The strongest source is press reporting; no primary evaluation was located. It grades who did the looking — not how well the project went. All four grades →

Run byBusan Transportation Corporation

Scale🏙️ City-wide

Cost≈₩1.26 trillion

FundingNational government and City of Busan

Part of 1001 Smart Cities — 1,167 documented projects · 🏙️ 9 more in Busan · 🚌 Public transport guide · 🚲 Mobility projects

Busan opened Line 4 on 30 March 2011: 12.7 km, 14 stations, Minam to Anpyeong, built for ₩1.26 trillion of national and city funds. It runs rubber-tyred trains on concrete guideways under K-AGT, a domestically developed automated-guideway standard, with no cab, no driver on board and platform screen doors at every station — the city calls it Korea's first unmanned light metro. It is also the network's least-used line: 29,295 riders a day in 2014 against 447,513 on Line 1. Faults still stop the whole line, for 1 hour 40 minutes in January 2025 and about two hours that March.

Live 📅 since 2011

📊 Impact

29,295 passengers a day in 2014 — the least-used line on the Busan network, against 447,513 on Line 1

🎓 Lesson

Automating a line does not fill it: Korea's first driverless metro is also its least-used, and full automation means a single fault can stop the entire line for hours.

🚲 Mobility Public transport Autonomous vehicles

Sources

↗ Busan Metropolitan City — Line 4 opens on the 30th (press release, 2011)Official city announcement: opening 30 March 2011 at 16:00, 12.7 km (7.2 km underground, 5.5 km elevated), 14 stations, ₩1.2616 trillion of national and city funds, platform screen doors at every station, and the city's own claim that this is Korea's first unmanned light metro.

↗ Busan Transportation Corporation — Line 4 construction historyOperator timeline: groundbreaking 3 December 2003, K-AGT vehicles delivered to Anpyeong depot March 2009, trackwork complete May 2010, trial running January-March 2011, Minam-Anpyeong (12.7 km, 14 stations) opened 30 March 2011 at a cost of ₩1,261.6 billion.

↗ Railway Gazette International — Driverless metro line opened in Busan (31 March 2011)Independent trade press on the opening: driverless rubber-tyred trains on a concrete rollway, 11 days of trial running 15-25 March 2011, rolling stock from Woojin Industrial Systems. Cited only for these points — the article's two length figures contradict each other, so the official 12.7 km is used instead. Site blocks automated fetching (403); existence and content confirmed via search index.

↗ Railway Gazette International — Four modes in Busan (July 2019)Supports the per-line ridership split for 2014 — 29,295 daily passengers on Line 4 against 447,513 on Line 1, 321,615 on Line 2 and 91,685 on Line 3 — i.e. Line 4 as the least-used line on the network.

↗ Busan Ilbo — Line 4 keeps stopping, passenger disruption mounts (17 March 2025)Regional daily, current status: the line has run as a fully unmanned system since 2011 and halts automatically on minor communication or sensor faults; documents the 18 January 2025 stoppage (1 h 40 min, loose catenary bolts) and the 15 March 2025 stoppage (about two hours), plus academic criticism of the operator's preventive maintenance.

Continue exploring

Compare this project

🇯🇵 Nanko Port Town Line (New Tram) Driverless Guideway · Osaka Rubber-tyred automated guideways: Osaka's 1981 New Tram put crews back after a crash; Busan's K-AGT line ran unmanned from day one in 2011. 🇰🇷 Busan-Gimhae Light Rail and Its Revenue Guarantee · Busan Two driverless lines opened in Busan in 2011: this one is the network's least used, the Gimhae line opened at 17% of its forecast. 🇰🇷 Osiria Autonomous Bus and the Night BRT Line · Busan Automation on rails and on the road: the guideway has run driverless since 2011; the Osiria buses still carry a safety operator.

Explore the wider context

🔑 Your Smart City Is Owned by Someone Else 📖 Grades of Automation (GoA)📖 CBTC (communications-based train control)📖 Personal rapid transit (PRT)

📎 Cite this project

1001 Smart Cities (2026). “Busan Metro Line 4 Driverless Light Metro” — Busan, South Korea. The Smart City Atlas. https://1001smartcities.org/projects/busan-metro-line4-driverless/ (last verified 2026-07-26). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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