time, which had been built either by the companies or the New York City Department of Transportation (NYCDOT). Central Maintenance Depots The MTA has two major "central maintenance facilities" (CMFs) that serve the New York City area. The Grand Avenue Central Maintenance Facility is adjacent to the Grand Avenue Depot in Maspeth, Queens, and the Zerega Avenue Central Maintenance Facility is located at 750 Zerega Avenue in the Bronx. Both maintenance facilities are responsible for the major reconstruction of buses in need of repair including engine rebuilding, transmission shops, and shops for body components on New York City Transit Authority's bus fleet, as well as repainting of buses. The facilities also include several employee workshops for surface transportation training and institutional instruction. In addition, Zerega Avenue CMF is responsible for registry of new buses in the fleet. The two facilities were conceived as part of the 1995-1999 and 2000-2004 MTA Capital Programs. The Zerega Avenue facility was opened in 2001, while the Grand Avenue facility was opened in 2007 along with the bus depot. Previously, the large repair shops of the East New York Depot served as the system's sole central maintenance shops; as of May 2016, East New York is considered a third central maintenance facility. Zerega Avenue Facility The Zerega Avenue Maintenance and Training Facility is a one-story structure located on the east side of Zerega Avenue between Lafayette and Seward Avenues in the Castle Hill section of the Bronx (), sitting along the western coast of Westchester Creek. Plans for the facility were conceived around 1999, and it was constructed in 2000. The facility received an award from the American Society of Civil Engineers for design-build project of the year in 2002. Around 2002, the Zerega shops began overhauling NYCT buses to operate on ultra-low-sulfur diesel. The facility includes paint booths for MTA buses, and was designed to maintain compressed natural gas (CNG) equipment. It also features numerous classrooms and a driving simulator to train MTA bus operators. Bronx Division The Manhattan and Bronx Surface Transit Operating Authority (MaBSTOA), a subsidiary of the New York City Transit brand, operates all the local routes in the Bronx aside from the Bx23 and Q50. The latter two routes and all express bus routes in the borough are operated by the MTA Bus Company. All depots in the division, including those under the MTA Bus Company, are represented by TWU