but were unsuccessful. Streetcars were converted to buses during November/December 1948. In 1949 National City Lines, General Motors and others were convicted of conspiring to monopolize the sale of buses and related products to their subsidiary transit companies throughout the U.S. Between 1946 and 1954 transbay fares increased from 20¢ to 50¢ ($ to $ adjusted for inflation). Fares in this period were used to operate and for 'motorisation' which included streetcar track removal, repaving, purchase of new buses and the construction of bus maintenance facilities. Transbay ridership fell from 22.2 million in 1946 to 9.8 million in 1952. The Key System's famed commuter train system was dismantled in 1958 after many years of declining ridership as well by the corrupt monopolistic efforts of National City Lines. The last run was on April 20, 1958. In 1960, the newly formed publicly owned AC Transit took over the Key System's facilities. Most of the rolling stock was scrapped, with some sold to Buenos Aires, Argentina. Several streetcars, interurbans and bridge units were salvaged for collections in the United States. Of the large bridge units, three are at the Western Railway Museum near Rio Vista, California while another is at the Orange Empire Railway Museum in southern California. System details The initial connection across the Bay to San Francisco was by ferryboat via a causeway and pier ("mole"), extending from the end of Yerba Buena Avenue in Oakland, California, westward 16,000 feet (4,900 m) to a ferry terminal near Yerba Buena Island. Filling for the causeway had been started by a short-lived narrow-gauge railroad company in the late 19th century, the California and Nevada Railroad. "Borax" Smith acquired the causeway from the California and Nevada upon its bankruptcy. On May 6, 1933, a major fire erupted on the pier end of the mole, consuming the ferry terminal building as well as gutting the ferryboat Peralta. The pier was subsequently reconstructed and a new terminal building erected. The Key System operated a fleet of ferries between the Key Route Pier and the San Francisco Ferry Building until January 15, 1939, when a new dual track opened on the south side of the lower deck of the San Francisco–Oakland Bay Bridge, bringing Key System trains to the then-new Transbay Terminal in San Francisco's downtown. The bridge railway and Transbay Terminal were shared with the Southern Pacific's Interurban Electric and the Western Pacific's Sacramento Northern