Diamond service was also introduced on the BMT Brighton Line during the Manhattan Bridge closure, with Brooklyn locals being the Circle Q and expresses being the Diamond Q. Similarly the 9 ran skip-stop with the 1 until May 2005. On the other hand, the rush-hour only skip-stop service that complements the J is designated Z rather than with diamonds. The rollsigns also have the regular diamonds, but with the word "Express" under the bullet. To replace the green 5 and 6 diamond services are green 8, 10 and 12 circles, and a purple 11 circle is present for a replacement of the 7 diamond. Both services run express in the Bronx between East 180th Street and 3rd Avenue/149th Street during rush hours in the peak direction.Ĭurrent rollsigns include several unused options to replace these. Until the end of May 2005, 5 rush hour trips to 238th Street Bronx were marked with a diamond, with regular service to Dyre Avenue. 7 regular service all local daytime directional diamond service express in Queens.6 regular service all local daytime directional diamond service express in the Bronx (with local service in the same direction cut back to Parkchester).Since a route letter or number is ordinarily presented inside a circle, variants of the same service are shown as the same letter or number inside a diamond shape. This has been implemented on the subway by use of diamond services. This informed boarding riders that the car would not travel all the way to its usual destination. For example, if a service was designated 10, a short-line of the service might have a diagonal stroke through the number. (For example, there are three stations at Kings Highway in Brooklyn.) Usually, identifying the service is also sufficient, but as services are transient, this is not a permanent label.ĭespite its efforts toward single identifiers for each service, the MTA has adopted a variation of a signage practice that began with street railways, in which a variant service is identified with a special colour or symbol on the route number signs.
Many stations share names, so to uniquely identify a station, the line name or cross street must be specified. Stations usually bear street names, but may also be named after neighborhoods or prominent locations (e.g., " Brighton Beach", " Cypress Hills") or combinations of these (e.g., " Times Square–42nd Street", " 47th–50th Streets–Rockefeller Centre"). IRT trains and tunnels are narrower, so the two do not mix in revenue service.Įach service is also assigned a colour, corresponding to the downtown Manhattan trunk line it uses the Crosstown Line, which doesn't carry services to Manhattan, is colored light green, and all shuttles are colored dark gray.
Former IRT services (now known as Division A) are assigned numbers, and former BMT and IND services (now known as Division B) are assigned letters. These are the most familiar names among the public, but may change frequently during construction or as services are rerouted to make best use of the network. This is a path that the train service uses along the various lines. Even the terms BMT, IRT and IND are still used in line, structure and building descriptions and capital contract specifications.Įach operating service or route is assigned a letter or number. Internally, the MTA uses the names, both for legal reasons and to describe lines, services and locations without ambiguity.
Public usage of the line names varies widely. Some lines have changed names (and even divisions), but this happens relatively infrequently. For example, the line under Eighth Avenue is the IND Eighth Avenue Line. Each section of the system is assigned a unique line name, usually paired with the division ( Brooklyn-Manhattan Transit Corporation (BMT), Interborough Rapid Transit Company (IRT), Independent Subway System (IND)). The most constant is the line, the physical structure and tracks that trains run over. These include line names, which refer to individual sections of subway, like the BMT Brighton Line service labels, like the B, which is a single train route along several lines and station names, like Coney Island–Stillwell Avenue.Įach section of subway has three identifying characteristics, line, service and colour. New York City Subway nomenclature describes terminology used on the New York City Subway system as derived from railroading practice, historical origins of the system, and engineering, publicity, and legal usage. Entrance to the IRT Lexington Avenue Line at Wall Street, leading to the southbound ("Downtown & Brooklyn") platform
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