The Golden Gate Bridge is a suspension bridge spanning the Golden Gate strait, the mile-wide, three-mile-long channel between San Francisco Bay and the Pacific Ocean. The structure links the U.S. city of San Francisco, on the northern tip of the San Francisco Peninsula, to Marin County, bridging both U.S. Route 101 and California State Route 1 across the strait. The bridge is one of the most internationally recognized symbols of San Francisco, California, and the United States. It has been declared one of the Wonders of the Modern World by the American Society of Civil Engineers.
The San Francisco–Oakland Bay Bridge (known locally as the Bay Bridge) 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 240,000 vehicles a day on its two decks. It has one of the longest spans in the United States.
The Carquinez Bridge refers to parallel bridges spanning the Carquinez Strait, forming part of Interstate 80 between Crockett and Vallejo, in the U.S. state of California. The name originally referred to a single cantilever bridge built in 1927, helping to form a direct route between San Francisco and Sacramento. A second parallel cantilever bridge was completed in 1958 to deal with the increased traffic. Later, seismic problems of the 1927 span led to the construction and 2003 opening of a replacement: a suspension bridge officially called the Alfred Zampa Memorial Bridge. Currently, the Alfred Zampa Memorial Bridge carries westbound Traffic from Vallejo to Crockett, and the 1958 cantilever span carries eastbound traffic.
The Richmond–San Rafael Bridge (officially, the John F. McCarthy Memorial Bridge) is the northernmost of the east–west crossings of the San Francisco Bay in California, USA, connecting Richmond on the east to San Rafael on the west end. It opened in 1956, replacing ferry service by the Richmond–San Rafael Ferry Company.
The Benicia–Martinez Bridge refers to three parallel bridges which cross the Carquinez Strait just west of Suisun Bay; the spans link Benicia, in the U.S. state of California on the north side with Martinez, California on the south. The two automobile bridges are referred to collectively as “The Benicia Bridge”.
The San Mateo–Hayward Bridge (commonly called the San Mateo Bridge) is a bridge crossing the U.S. state of California’s San Francisco Bay, linking the San Francisco Peninsula with the East Bay. The bridge’s west end is in Foster City, a suburb on the eastern edge of San Mateo. The east end of the bridge is in Hayward. It is the longest bridge in the San Francisco Bay Area and the 25th longest in the world by length. The bridge is owned by the state of California, and is maintained by Caltrans, the state highway agency. Further oversight is provided by the Bay Area Toll Authority.
The Dumbarton Bridge is the southernmost of the highway bridges across San Francisco Bay in California. Carrying over 81,000 vehicles daily, it is the shortest bridge across San Francisco Bay at 1.63 miles (8,600 ft; 2,620 m). Its east end is in Fremont, near Newark in the San Francisco Bay National Wildlife Refuge, and its west end is in Menlo Park. It has three lanes each way and a separated bike/pedestrian lane along its south side. Like the San Mateo Bridge to the north, power lines parallel the bridge.
– all bridge descriptions provided by Wikipedia.