12 (BMT rapid transit service)

The 12 (BMT rapid transit service) refers to a former rapid transit service that operated on the Brooklyn–Manhattan Transit Corporation (BMT) lines in New York City. This service operated during a specific period and route configuration which involved a numerical designation – in this case, the number 12. Typically, numerical designations were used in conjunction with specific letters to fully represent a BMT service; the number 12 likely formed part of a more complex route identifier that specified terminals, local or express stopping patterns, and the lines used along its route.

Due to the historical nature of this service, information about its precise routing, stopping patterns, and operational dates may be limited or require further research of archived transit documents and historical records. The BMT, along with the Interborough Rapid Transit Company (IRT) and the Independent Subway System (IND), were consolidated into the current New York City Subway system, which led to many route changes and redesignations over time. Therefore, a service designated as "12" may have been absorbed into, or replaced by, a different route with a different designation in later years.