14th Street–Union Square is an express station on the BMT Broadway Line that has four tracks and two island platforms. The N and Q trains stop here at all times. The R stops here at all times except late nights, while the W stops here during weekdays. The island platforms were originally long, but as a result of an extension in the early 1970s, became long. The platforms are below the street. At the southern end of each platform, three stairs and an elevator lead to the mezzanine, and one stair leads to the Canarsie Line platforms. At the northern end of each platform, two stairs lead to the mezzanine.