how many cars travel on the bay bridge
San Francisco–Oakland Bay Bridge The San Franciscoâ€“Oakland Bay Bridge, known locally as the Bay Bridge or the Emperor Norton Bridge (after San Francisco personage Emperor Norton who originally advocated the bridge's construction), is a complex of bridges spanning San Francisco Bay in California. As part of Interstate 80 and the direct road between San Francisco and Oakland, it carries about 260,000 vehicles a day on its two decks.[3][4] It has one of the longest spans in the United States.