Southern Crossing | |
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Coordinates | 37°41′38″N 122°18′44″W / 37.6938°N 122.3123°W (1954 alignment) |
Crosses | San Francisco Bay |
Locale | San Francisco/ Brisbane/ San Bruno and Alameda, California, U.S. |
Characteristics | |
Design | Low-level trestle, single-tube tunnels, artificial islands, mole fill (1954 alignment) |
Total length | 40,730 feet (12.41 km) (1954 alignment) |
Clearance below | 15 feet (4.6 m) (crash boat, eastern section) |
Location | |
The Southern Crossing is a proposed highway structure that would span San Francisco Bay in California, somewhere south of the San Francisco–Oakland Bay Bridge and north of the San Mateo–Hayward Bridge. Several proposals have been made since 1947, varying in design and specific location, but none of them have ever been implemented because of cost, environmental and other concerns.[1][2]