Metro-North Railroad's New Haven Line runs from New Haven, Connecticut, southwest to Mount Vernon, New York. There it joins the Metro-North Harlem Line, where trains continue south to Grand Central Terminal in Manhattan. The New Haven Line's ridership, at 125,000 weekday and 39 million annual passengers, ranks as the busiest rail line in the United States.The line is owned by Metro-North from Mount Vernon to the New York-Connecticut border.