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 324 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. The system currently has 126 stations on eleven rail lines called "branches". (Not included in this count are two additional stations that serve employees of the LIRR: and ). Two stations are open seasonally: and ; in addition, the station exclusively serves cemeteries in its area and is thus served during daytime hours. and are open only on weekdays. The six stations on the Main Line east of Ronkonkoma get very limited week-round trains, and are often used for recreation rather than commuting. is a major transfer station between branches, as it provides the interchange from the eastern Long Island stations to the western New York terminals and vice versa. Other inter-branch transfer stations include , , , , and . The , and stations provide transfers between electric train service and diesel train service within their respective branches, the Port Jefferson, Ronkonkoma/Greenport and Babylon/Montauk branches. Lines This list shows the western and eastern terminals of each LIRR service. There are 10 total services, plus one additional seasonal service (the Belmont Park Branch). and the two employees-only stations are not included in the station counts below. Trunk lines The LIRR has three trunk lines; each branch begins eastbound trips out of New York City via one of these lines. Station types and designs The Long Island Rail Road has four types of station designs: Ground level (most common, platforms accessible via ramps and/or staircases) Elevated (all Babylon Branch stations and select others) Open-cut (select Port Washington Branch stations) Underground (only , , and terminal) Additionally, some stations have station houses ("staffed", if open), whereas others do not ("unstaffed", if there is none or if the office is closed). Some stations with station houses have ticketing