Centennial History of the Pennsylvania Railroad Company, 1846-1946. Philadelphia: Pennsylvania Railroad, 1949. Turns out a SEPTA predecessor used double-decker buses (WHYY, August 24, 2015) Jarrett Walker's philosophy of public transit as means to freedom (WHYY, December 7, 2016)

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The fact that the first open double-decker bus service for tourists was started in collaboration with the Maharashtra Tourism Development Corporation (MTDC) in 1997 highlights its long history of serving tourists. Additionally, the regular non-AC double-decker buses, While other double-deckers preceded them, perhaps the most widely recognized versions are the AEC Regent III RT, introduced in 1939, and the later AEC Routemaster, introduced to regular service in 1956. ^{History of Vehicles. The AEC Routemaster is a model of double-decker bus that was built by Associated Equipment Company (AEC) in 1954 (in production from 1958) and produced until 1968. Primarily front-engined, rear open-platform buses, a small number of variants were produced with doors and/or front entrances.} . 218 150 332 356 80 209 240 448

history of double decker bus