The Ronald J. Sullivan Photograph Collection is an extensive collection of photographs and slides of public and commercial buses and public transit and commuter trains, dating from 1946-2000, and held in the collections of Northwestern University's Transportation Library.

The bulk of the collection comprises photographs taken by Ronald J. Sullivan, an amateur photographer and rail and bus enthusiast; also included are historic images of Chicago-area transit that were part of Sullivan’s personal collection, and which supplement the photographer’s original material. The majority of the photographs were taken in Chicago, Illinois and the surrounding area, with a few in other cities and international locations. Each photograph or slide is documented in detail as to where and when it was taken. Included is the bus or train number, route number, street intersection or station and the date.

This map highlights a selection of photos from the collection, and maps them according to the information Sullivan recorded on each photograph or slide. View the collection in its entirety in Northwestern University Libraries' Digital Collections portal.