High Quality Content by WIKIPEDIA articles! The 42nd Street Shuttle is a New York City Subway shuttle train service that operates in Manhattan. It is sometimes referred to as the Grand Central / Times Square Shuttle, since these are the only two stations served by the shuttle. It runs at all times except late nights, connecting Times Square to Grand Central under 42nd Street. It is the shortest regular service in the system, running 0.8 miles (1.3 km) in officially one minute. The 42nd Street Shuttle is part of the A Division of New York City Transit, and the tracks that it uses opened in 1904 as part of the first subway in the city. In order to distinguish it from the other shuttles in the system, NYCT Rapid Transit Operations internally refers to it as the 0. It has no above-ground stations, making it the only IRT service to remain completely underground during its entire run.