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Nyc Subways Slowly Upgrading from 1930s-Era Technology


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Subway interlocking switch and signal control board

In this Dec. 16, 2014 photo, lights on a section of the MTA subway interlocking switch and signal control board shows train locations, at the 4th Street MTA Supervisory Tower in New York.

Credit: AP Photo/Bebeto Matthews

New York City's subways—the nation's biggest mass transit network—serve more than 6 million daily riders who depend largely on a signal system that dates back to the Great Depression.

From The Associated Press
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