Which bridge across San Francisco Bay opened in 1936 and carries traffic between San Francisco and Oakland?

The San Francisco–Oakland Bay Bridge opened in 1936 and carries traffic between San Francisco and Oakland across San Francisco Bay.

The original crossing was a complex combination of suspension bridges, a tunnel through Yerba Buena Island and a cantilever span. It was built during the 1930s as one of the largest public works projects in California and transformed travel across the bay.

A major eastern span replacement opened in 2013 after the 1989 Loma Prieta earthquake exposed vulnerabilities in the original structure. The bridge is often confused with the Golden Gate Bridge, but the Bay Bridge connects San Francisco with the East Bay, while the Golden Gate crosses north to Marin County.