The New York City Transit Authority operates 24 rail yards for the New York City Subway system and one for the Staten Island Railway.[1][2][3] There are 10 active A Division yards and 11 active B Division yards, two of which are shared between divisions for storage and car washing. In addition, there is one yard for the Staten Island Railway and three non-revenue (Maintenance of Way, or MoW) Division-independent yards. Many of the system's yards are used for off-peak storage, whereas some have inspection facilities where basic routine maintenance is carried out. Of these yards, rolling stock are assigned to seven A Division yards and seven B Division yards. Within the yards are 14 maintenance facilities, whereas two yards (207th Street and Coney Island) perform major overhaul and car rebuilding work.[2]