The Second Avenue Subway Line in New York is the most expensive subway in the world, costing approximately $2 billion per mile. Factors affecting cost include location, property prices, labor costs, design and construction plans, and age of existing transit lines.
A new subway line can cost anywhere from several million US dollars (USD) to several billion dollars, depending on where the line is being built, its lifespan and labor costs. When completed, the Second Avenue Subway Line in New York will be the most expensive subway in the world, costing approximately $2 billion per mile (1.6 km) and more than $17 billion total. By comparison, London’s Jubilee line costs about $560 million per mile (1.6 km); Singapore’s Circle Line costs about $208 million per mile (1.6 km); and Madrid’s Metrosur line, which is nearly five times longer than the Second Avenue Metro line, costs about $92.8 million per mile (1.6 km).
Further information on the subway lines:
The location of a subway line can really affect the cost of construction. One of the reasons the Second Avenue line is so expensive is the cost of Manhattan property. Other reasons include high labor costs and expensive design and construction plans.
Another factor that determines the cost of a subway or subway line is the age of the existing transit line. Lines in cities like New York and Chicago, where subway services have been in operation since the 1800s, are much more expensive to upgrade than other newer lines.
The Second Avenue Subway Line has been planned and built on and off since 1936.
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