High Quality Content by WIKIPEDIA articles! The Long Island Rail Road (LIRR) is a commuter railway system serving all four counties of Long Island, with one station in the Manhattan borough of New York City in the U.S. state of New York. Its operator is the Metropolitan Transportation Authority of New York. Serving 301,763 passengers per day as of 2007 and 88.5 million riders for the year of 2008, it is the busiest commuter railroad in the United States. With about 315 passenger route-miles, it spans Long Island from Atlantic Terminal in Brooklyn to Montauk station at the tip of the southern fork. Pennsylvania Station in Manhattan is the actual westernmost station of the Long Island Rail Road and its busiest station.