The New York City Subway is a rapid transit system that is in New York City, United States. It is run by the Metropolitan Transportation Authority (MTA). It is one of the biggest rapid transit systems in the world, with 472 stations. It has 245 miles (or 394 km) of routes on 691 miles (or 1112 km) of track.What is D train route?
The D Sixth Avenue Express is a rapid transit service in the B Division of the New York City Subway. Its route emblem, or "bullet", is colored orange since it uses the IND Sixth Avenue Line in Manhattan.