The L 14th Street–Canarsie Local is a rapid transit service in the B Division of the New York City Subway. Its route emblem, or "bullet", is colored medium gray since it serves the BMT Canarsie Line.

Rapid transit or mass rapid transit (MRT), also known as metro, is a type of high-capacity public transport that is generally built in urban areas. A rapid transit system that primarily or traditionally runs below the surface may be called a subway, tube, or underground. Unlike buses or trams, rapid transit systems are railways, usually electric, that operate on an exclusive right-of-way, which cannot be accessed by pedestrians or other vehicles. They are often grade-separated in tunnels or on elevated railways.