New York metropolitan area eight subregions are often further divided. For instance, Long Island can be divided into its South and North Shores (usually when speaking about Nassau County and western Suffolk County) and the East End. The Hudson Valley and Connecticut are sometimes grouped together and referred to as the Northern Suburbs, largely because of the shared usage of the Metro-North Railroad system. The geographical, cultural, and economic center of the metropolitan area is New York City, which consists of five boroughs, each of which is also a county of New York State. The five boroughs – Brooklyn, Queens, Manhattan, the Bronx, and
5 (New York City Subway service) 5 (New York City Subway service) The 5 Lexington Avenue Express is a rapid transit service in the A Division of the New York City Subway. Its route emblem, or "bullet", is colored apple green since it uses the IRT Lexington Avenue Line in Manhattan. The 5 operates at all times. Weekday rush hour and midday service operates between Dyre Avenue in Eastchester, Bronx and Flatbush Avenue–Brooklyn College in Midwood, Brooklyn, making local stops in the Bronx and express stops in Manhattan and Brooklyn; during rush hours in the peak direction, 5 trains operate express in the Bronx between East