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Under construction: the New York City subway

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By Claudine Zap

The Metropolitan Transportation Authority (MTA) has taken on three massive projects: East Side Access, the No. 7 subway line extension, and the new Second Avenue subway line. Construction for the projects is taking place deep underground, much of it simultaneously. The three projects span 14 miles and are expected to be finished in 2019 at an estimated cost of $15 billion.

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