The San Francisco-Oakland Bay Bridge is a major bridge complex in California, connecting the cities of San Francisco and Oakland. It spans approximately 4.5 miles and consists of two major spans: the western span, which is a suspension bridge, and the eastern span, which is a self-anchored suspension bridge. The bridge was completed in 1936 and is an important transportation route for vehicles and public transit. The bridge features a total of eight lanes for vehicle traffic and includes a dedicated bike lane. It is known for its iconic views of the San Francisco skyline and the San Francisco Bay. The bridge is also a vital part of the Bay Area transportation network, facilitating the movement of millions of commuters each year.