introducing...

the MTA's first late-night subway map.  hi-res verion.

The map has a gray background color to prevent confusion with the normal subway map. The New York City Subway is the only large subway or metro system in the world to maintain service to all its stations around the clock. The overnight service shown in the night map runs generally from midnight to 6 a.m., although certain lines’ overnight service patterns depicted in the map may begin or end slightly earlier or later than these times. The MTA has printed 25,000 copies of the map in tandem with its normal press run of a million copies of the standard subway and railroad map. (via)