For those of you killing time waiting to see if the Bay Bridge reopens on schedule, why not spend ten minutes watching this charming film, "The March of Progress," about the engineering marvel of the Key Route trains that once traveled back and forth on the lower deck of the bridge. The Key System served the East Bay from 1903 to 1960, and provided transbay service from the time of the bridge's construction in 1936 until 1958 when the lower deck was opened up to eastbound auto traffic. more ›