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Science in the City:  Rebuilding Doyle Drive (Clip)
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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.

Project: Science in the City | Browse All

Date: November 23, 2011
Format: Expedition
Category: Everyday Science
Subject(s): engineering, city planning

Keywords: john walters, doyle drive, bridge, seismic, seismology, presidio parkway, presidio parkway project

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Gordon and Betty Moore Foundation
Gordon and Betty Moore Foundation
Webcasts made possible through the generosity of the Gordon and Betty Moore Foundation, The Jim Clark Endowment for Internet Education, the McBean Family Foundation,.and the Corporation for Educational Networks Initiatives in California (CENIC).

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