What is the estimated cost of building a subway line in Singapore in Singapore dollars (SGD)?

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 The cost of building a subway line in Singapore can vary significantly depending on factors like the line length, depth, construction challenges, and required infrastructure. However, recent estimates provide some insights:


1. Per-Kilometer Cost: Subway construction in dense urban environments like Singapore often costs around SGD 400–600 million per kilometer. This figure covers tunneling, stations, and necessary systems.



2. Total Line Cost: For instance, the Thomson-East Coast Line (TEL), a recent 43-kilometer project, was estimated to cost about SGD 24 billion, which averages SGD 558 million per kilometer.



3. Factors Influencing Costs: Costs increase with complex engineering needs, such as deep tunnels or integration with existing infrastructure. Additionally, managing utilities and minimizing disruptions in a built-up area like Singapore can add to the expense.




Summary: A typical estimate would be SGD 400–600 million per kilometer, with a complete subway line possibly costing from SGD 10 billion to over SGD 20 billion depending on length and complexity.


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