High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! The Bay Area Rapid Transit is the main transit authority for the San Francisco Bay Area. It was first proposed in 1946, and was built in the 1960s. The idea of an underwater electric rail tube was first proposed in the early 1900s by Francis "Borax" Smith. It is no coincidence that much of BART's current coverage area was once served by the electrified streetcar and suburban train network called the Key System. This early twentieth century system once had regular trans- bay traffic across the lower deck of the Bay Bridge. By the 1950s the entire system had been dismantled in favor of automobiles and buses and the explosive growth of highway construction.

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