The John F. Tucker Transit History Collection consists of official documents produced or used by Mr. Tucker during his career as a public transit official, records of the pre-SEPTA Philadelphia Rapid Transit Company (1907-1939) and the Philadelphia Transportation Company (1940-1968) that he preserved from loss or destruction, and materials collected out of his interest in the history of transit systems, particularly electric traction lines. The collection traces the evolution of the Philadelphia transit system, its extent, routes and services, and of North American rail rapid transit generally.