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Tue 30 Aug 2011 09:19 PM

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The world's largest self-anchored suspension bridge

Work began on the San Francisco-Oakland Bay Bridge in 2002 and is estimated to have cost $6.3bn

The world's largest self-anchored suspension bridge
Catwalks hang over a section of the newly constructed eastern span of the San Francisco-Oakland Bay Bridge during a media tour of the self-anchored suspension span tower on August 29, 2011 in Oakland, California. (Getty Images)
The world's largest self-anchored suspension bridge
A model of the eastern span of the San Francisco-Oakland Bay Bridge self-anchored suspension span tower is on display inside the CalTrans public information office on August 29, 2011 in Oakland, California. (Getty Images)
The world's largest self-anchored suspension bridge
Construction crews have erected twelve foot wide catwalks that connect to the San Francisco-Oakland Bay Bridge self-anchored suspension span's tower and crews will begin to lay the nearly one mile of main cable beginning in early 2012. (Getty Images)
The world's largest self-anchored suspension bridge
The bridge has been under construction since 2002 with an estimated price tag of $6.3bn and will have the world's tallest Self-Anchored Suspension (SAS) tower once completed. (Getty Images)
The world's largest self-anchored suspension bridge
When completed, the Self-Achored Suspension span (SAS) will transform the bridge’s appearance with its unique, asymmetric design. (Getty Images)
The world's largest self-anchored suspension bridge
All elements of the SAS, including the tower, piers, colour and lighting, will emphasise an elegant, futuristic appearance. (Getty Images)
The world's largest self-anchored suspension bridge
Motorists will be able to enjoy a dramatic view of the Bay Area’s landscape while driving under an angled canopy of suspension cables. (Getty Images)
The world's largest self-anchored suspension bridge
The SAS has been designed to be aesthetically unique as well as functional — capable of withstanding a major earthquake. (Getty Images)
The world's largest self-anchored suspension bridge
Construction crews have erected twelve foot wide catwalks that connect to the San Francisco-Oakland Bay Bridge self-anchored suspension span's tower and crews will begin to lay the nearly one mile of main cable beginning in early 2012. (Getty Images)
The world's largest self-anchored suspension bridge
Originally scheduled to open in 2007, the bridge is now scheduled to open to traffic in 2013. (Getty Images)
The world's largest self-anchored suspension bridge
The bridge has been under construction since 2002 with an estimated price tag of $6.3bn. (Getty Images)
The world's largest self-anchored suspension bridge
During the 1989 Loma Prieta earthquake, a 50ft (15m) section of the upper deck of the eastern truss portion of the bridge collapsed onto the deck below, indirectly causing one death at the point of collapse. (Getty Images)
The world's largest self-anchored suspension bridge
The original eastern span of the Bay Bridge, built in 1936, became the subject of concern after a section collapsed during the Loma Prieta earthquake in 1989. The replacement span is engineered to withstand the largest earthquake expected over a 1500 year period, and it is expected to last at least 150 years with proper maintenance. (Getty Images)