1001 Smart Cities
🚲 Mobility
🇨🇳 Tianjin

Line 8 Driverless Metro (GoA4)

Tianjin Metro Line 8 opened on 28 December 2021 as the city's first GoA4 fully automatic line: Type-A six-car trains under CBTC signalling that run with no cab and no onboard driver, operated by Tianjin Rail Transit Group. The opening segment (formerly built as Line 6 Phase 2) runs 13.42 km across 9 stations between Nankai and Jinnan districts. Service was briefly suspended over the 2022 Lunar New Year amid a COVID-19 outbreak and resumed on 27 January 2022. A westward extension and an 18.54 km, 17-station Phase 1 main section are under construction, targeted for completion in 2026.

Live 📅 since 2021

🤖 AI-generated summary of the sources below — how this works · 🔎 Last verified

🚲 MobilityAutonomous vehiclesPublic transport
Scale🏙️ City-wide

📖 Terms in this entry: CBTC (communications-based train control) · Grades of Automation (GoA) · Personal rapid transit (PRT)

Sources

↗ Baidu Baike: Tianjin Rail Transit Line 8Confirms operator (Tianjin Rail Transit Group), 28 Dec 2021 opening, GoA4 automation ('天津首条采用GoA4级全自动运行的轨道交通线路'), 13.42 km/9 stations, and the Phase 1 main section (18.54 km, 17 stations) targeted for 2026.
↗ Wikipedia: Line 8 (Tianjin Metro)Confirms GoA4 Type A automated trains, the 28 Dec 2021 opening, and the temporary suspension (9 Jan–27 Jan 2022) due to a COVID-19 outbreak.

This overview was generated with AI from the public sources listed above 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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Compare this project

🇰🇷 Incheon Metro Line 2's Road to Fully Unattended Operation · Incheon Contrast: Incheon's line took years of onboard staff before going fully unattended; Tianjin's opened GoA4 from day one. 🇨🇳 Zhujiang New Town Automated People Mover (APM) · Guangzhou Domestic peers a decade apart: Guangzhou's 2010 APM was an early GoA4 test bed for the full metro line Tianjin built. 🇨🇳 Wuhan Metro Driverless Lines (5, 12 & 21) · Wuhan Same GoA4 driverless grade in another Chinese city, a smaller-scale peer to Wuhan's three automated lines.

Explore the wider context

🔑 Your Smart City Is Owned by Someone Else🚗 Autonomous vehicles guide🏙️ Tianjin city profile🚲 Mobility projects
📎 Cite this project

1001 Smart Cities (2026). “Line 8 Driverless Metro (GoA4)” — Tianjin, China. The Smart City Atlas. https://1001smartcities.org/projects/tianjin-metro-line8-goa4/ (last verified 2026-08-02). Data: CC BY 4.0.

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

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