San Francisco–Oakland Bay Bridge
The San Francisco–Oakland Bay Bridge is a series of bridges across San Francisco Bay in the U.S. state of California. It is part of Interstate 80 in California.
| Characteristics | |
|---|---|
| Design | Double-decked suspension spans (two, connected by center anchorage), tunnel, cast-in-place concrete transition span, self-anchored suspension span, precast segmental concrete viaduct |
| Clearance above | Westbound: 14 feet (4.3 m), with additional clearance in some lanes Eastbound: 14.67 feet (4.47 m) |
| History | |
| Construction start | July 8, 1933 |
| Statistics | |
| Daily traffic | 260,000[1][2] |
| Designated | August 13, 2001 |
| Reference no. | 00000525[3][4] |
| Location | |
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It has two spans over water. The western span is a suspension bridge. The eastern span is a self-anchored suspension bridge.[6] The eastern span used to be a cantilever bridge but it was removed once the new bridge opened. The cantilever span was destroyed in the 1989 Loma Prieta Earthquake, which is one of the reasons why the Eastern span was replaced.
The western span is a double suspension bridge with two decks. Westbound traffic is carried on the upper deck and eastbound on the lower deck. The new east span is a single deck with the eastbound and westbound lanes on each side. It is the world's widest bridge.[7]
San Francisco–Oakland Bay Bridge Media
Bridges crossing San Francisco Bay
Sketch of the proposed "Rush San Francisco Trans-Bay Suspension Bridge" (1913)
Preliminary layout studies for the bridge, with Figures "H", and "P" selected as the final construction choice for western and eastern sections
The Bay Bridge under construction at Yerba Buena Island in 1935
A double balanced cantilever bridge, five truss bridges, and two truss causeways that connected Yerba Buena Island to Oakland. Dismantled in 2016.
Traveling through the westbound upper level of the Yerba Buena tunnel
The illuminated western span as seen from the Embarcadero in San Francisco
Schematic drawing of the Bay Bridge
A Key System interurban crossing the bridge
Disused passengers facilities on Yerba Buena Island for riders traveling northbound
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References
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The English Wikibooks has more information on: |
- ↑ "Traffic Census Program". California Department of Transportation. 2015. Retrieved July 14, 2017.
Traffic Volumes: Annual Average Daily Traffic
- ↑ "San Francisco-Oakland Bay Bridge". Metropolitan Transportation Commission. Bay Area Toll Authority. 2014–15. Retrieved July 14, 2017.
45.5 million toll-paid vehicles (91.0 million trips) annually
- ↑ 3.0 3.1 "National Register of Historic Places Registration Form". National Park Service – USDoI. Retrieved July 28, 2012.
- ↑ "National Register Information System". National Register of Historic Places. National Park Service. 2009-03-13.
- ↑ San Francisco-Oakland Bay Bridge Archived November 3, 2010, at the Wayback Machine
- ↑ In a self-anchored suspension bridge the main cables are attached to the end of the road deck. This avoids having anchor points in unstable ground.
- ↑ Press release (California Department of Transportation) 2014. [1]
