As noted by AllThingsD, New Yorkers will now have access to accurate arrival times for seven of the city’s subway lines as the Metropolitan Transit Agency today released a new app that provides access to the real-time train location data. Available on the App Store, the MTA Subway Time iPhone app is a test app released by the MTA for the 1, 2, 3, 4, 5, 6, and S 42 Street Shuttle lines. It displays the same data as the countdown clocks inside stations, and the MTA will make the data available on its website for developers to use in third-party apps.

The app covers the 156 stations where the MTA has installed countdown clocks that provide arrival estimates in minutes for upcoming trains. This app joins MTA Bus Time™, Metro-North Train Time™, LIRR Train Time™, and MTA Bridges and Tunnels’ Travel Time in the MTA’s expanding list of real-time data tools for customers.

As for the remainder of the subway lines, The Wall Street Journal explained it could take until 2016:

The new signals were installed at a cost of more than $228 million over 11 years, the MTA said. Two other lines are already being overhauled in a way that will eventually allow real-time updates: the L line running between northern Brooklyn and Manhattan’s 14th Street, which already uses an advanced signal system; and the No. 7 line between Queens and Midtown Manhattan, which is receiving the same upgrade.

The L line should be added to the data stream that feeds Subway Time within six to 12 months, the agency said. The improvements that would add the No. 7 to smartphone apps won’t be completed until 2016.

Today, New York City Mayor Bloomberg attributed an increase in the city’s annual crime index to a rise in iPhone and iPad thefts.