The New York State Department of Transportation (NYSDOT) is the department of the government of New York[REF] responsible for the development and operation of highways, railroads, mass transit systems, ports, waterways, and aviation facilities within New York State.
In addition to the well known New York City Subway system - which is confined within New York City - four suburban commuter railroad systems enter and leave the city: the Long Island Rail Road, Metro-North Railroad, Port Authority Trans-Hudson, and five of New Jersey Transit's rail lines.