Science in the City
Rebuilding Doyle Drive (Clip)
Rebuilding Doyle Drive (Clip)
Date: November 23, 2011
Running Time: 00:03:50
Other Viewing Options
At the southern end of the Golden Gate Bridge, a construction project to rebuild the elevated freeway ramp formerly known as Doyle Drive is underway. Senior bridge engineer John Walters tours us through some of the new seismic technologies being installed, including a seismic joint designed to handle several feet of longitudinal movement and a spherical bearing that allows for three-dimensional movement. Walters also points out a temporary structure built over the historic Presidio Pet Cemetery to protect the grave sites while providing a platform for the construction overhead.
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