The Singapore Mass Rapid Transit (MRT) is the most expensive metro system in the world.
The Singapore MRT, despite being Southeast Asia's oldest metro network, is also the most expensive to construct. By 2021, construction costs had reached a staggering $111.5 billion, primarily due to high land values within the densely populated city-state.
| Metro System | Reason for High Cost | Cost (by 2021) |
|---|---|---|
| Singapore Mass Rapid Transit (MRT) | High Land Values in Singapore | $111.5 Billion |
