Key System and March of Progress
Unfinished History
A Key System train on the Bay Bridge, depicted in the opening celebratory newspaper.
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The March of Progress: Tour of the modern interurban trolley system of San Francisco's East Bay and over the San Francisco-Oakland Bay Bridge. Predicts the bright postwar future of streetcar transit, with visionary images of advanced-design railcars. The Key System transbay service was abandoned in 1961.
Video: Prelinger Archive
An advertisement from the Pacific Telephone & Telegraph Company welcoming the new, modern Bay Bridge.