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J/Z (New York City Subway service)

The J Nassau Street Local/Express and Z Nassau Street Express (earlier Jamaica Express and displayed as Jamaica Local/Express on the R160 cars) are two rapid transit services in the B Division of the New York City Subway. Their route emblems, or "bullets", are colored since they use the BMT Nassau Street Line in Lower Manhattan. The J operates at all times while the Z operates six rush-hour trips in the peak direction on weekdays; both services use the entire BMT Archer Avenue, Jamaica, and Nassau Street lines between Jamaica Center – Parsons/Archer in Jamaica, Queens and Broad Street in Lower Manhattan (via the Williamsburg Bridge between Brooklyn and Manhattan). On weekdays, trains run express in the peak direction in Brooklyn between Myrtle Avenue and Marcy Avenue, bypassing three stations. During rush hours also in the peak direction, the J and Z form a skip-stop pair between Sutphin Boulevard and Myrtle Avenue. At all other times, the J serves every station on its entire route.