New York's Metropolitan Transportation Authority (MTA) released the first-ever map showing the scheduled overnight service of the subway system, when three subway lines don't run, three lines become shuttle trains, six express trains run as locals and a night-only shuttle appears. 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 6:00 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. The night map, developed in-house by the MTA, is the same size as the standard map and similarly folds into a handy pocket-sized document.

To view the map, click here.