AOL.com Video - New York City Unveils an App to Track Trains

VIDEO:Tech

New York City Unveils an App to Track Trains

Description:America's largest subway system launched a smartphone application that will reveal train-arrival times on seven of the city's 24 lines-a leap forward for a service that has lagged behind its peers both at home and abroad in adopting new technologies. WSJ Greater New York reporter Ted Mann has the scoop. (3:45)

Source: WSJLive

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