From 2005 to 2006, the remaining private operators were taken over by the MTA Bus Company. The Transit Authority inherited at least 12 bus depots from the company, some of which were kept in operation while others were condemned and closed. In 1962, the New York City Transit Authority (successor to the BOT) and its subsidiary Manhattan and Bronx Surface Transit Operating Authority (MaBSTOA) took over the operations of the Fifth Avenue Coach Company in Manhattan and the Bronx. From 1947 to 1950, the BOT reconstructed numerous depots and trolley barns inherited from the private operators, and erected or purchased new facilities to expand capacity. On September 24, 1948, the BOT took over the East Side Omnibus Corporation and Comprehensive Omnibus Corporation in Manhattan, receiving two depots in East Harlem. In 1947, the BOT took over the North Shore Bus Company in Queens and Isle Transportation in Staten Island, giving the city control of the majority of surface transit in Brooklyn, Queens, and Staten Island.

The streetcar lines would be motorized into diesel bus routes or trolleybus routes over the next two decades. On June 1, 1940, the New York City Board of Transportation (BOT) took over the streetcar operations of the Brooklyn–Manhattan Transit Corporation (BMT), as part of the unification of the city's transit system under municipal operations. Main articles: MTA Regional Bus Operations and New York City Transit Authority

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