Top 10 Metropolitan Areas with the Longest Urban Tunnel Systems
This ranking is based on comprehensive data of urban underground transport networks as of 2026, including metro lines, rapid transit systems, and exclusive underground tunnels. These massive infrastructure networks highlight the global megacities' achievements in public transport efficiency and urban planning.
Interesting Facts & Summary
As of 2026, Shanghai firmly holds the top spot globally with over 900 kilometers of operational subway lines. This figure not only cements its status as the ultimate "Underground City," but represents nearly 70% of the straight-line distance between Shanghai and Beijing. In contrast, while London pioneered the world's first underground railway, its system is largely defined by century-old tunnels. Shanghai’s network stands as a highly dense, high-capacity, and remarkably complex modern engineering marvel, moving over 11 million passengers daily—a scale and efficiency that remains largely unmatched by traditional European urban transit systems.
| Rank | Metropolitan Area | Total Tunnel Length (km) | Core System Features |
|---|---|---|---|
Shanghai | 980 | Features the world's longest urban rail network | |
Beijing | 850 | Highly dense underground rail interchange hubs | |
Guangzhou | 700 | Core underground transport artery of the Pearl River Delta | |
| 4 | London | 650 | World's oldest underground railway system |
| 5 | New York City | 620 | Subway system with the highest number of stations globally |
| 6 | Shenzhen | 610 | Rapidly expanding modern underground network |
| 7 | Chengdu | 580 | Largest underground transport system in Southwest China |
| 8 | Moscow | 550 | Deep-level system known for architectural station design |
| 9 | Tokyo | 530 | Ultra-dense interconnected underground network |
| 10 | Seoul | 500 | Highly intelligent integrated underground transit system |