Exploratorium home Exploratorium home Explo.tv
Science in the City
Rebuilding Doyle Drive (Clip)
Date: November 23, 2011
Running Time: 00:03:50

Other Viewing Options
   QuickTime 1100K  
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.
Urban environments like San Francisco are full of mysterious natural and human-made phenomena. Why are there so many one-footed pigeons? Where does the sewage go? Why is our “summer” in May and September? The Exploratorium is “taking it outside" to explore these and other questions in engineering, ecology, optics, waves, geology, architecture, weather, and more. Look for new episodes once a month.

Upcoming

00:10:00
San Francisco Water Works (Clip)
9/9/2015   
The drinking water provided for San Francisco and many nearby communities is among the purest i ...

Featured

00:05:31
Sound Restoration (Clip)
6/10/2015   
Experimental physicist Carl Haber restores antique audio recordings too old, fragile, or ...
 
00:05:00
Tofu (Clip)
4/8/2015   
Curious about Tofu? The folks over at Hodo Soy Beanery tell us everything we ever wanted to kn ...
 
00:06:30
Restoring the Salt Ponds (Clip)
10/7/2014   
What are salt ponds and why are they are being restored to their natural habitat? The South Bay ...
 
00:05:16
The Science of Firefighting: Cisterns (Clip)
9/10/2014   
Ever notice a brick-lined circle embedded into a street intersection? Keep an eye out and y ...
 
00:05:26
Search for Extraterrestrial Intelligence (Clip)
4/8/2014   
Join Exploratorium staff scientist Ron Hipschman as we visit Dan Werthimer, Director ...

Recent

00:05:00
Whales Washed Ashore on Northern California Beaches (Clip)
8/11/2015   
A dozen whales, different species and ages, have washed up recently on nearly 300 miles of ...
 
00:06:10
Big and Tall Bikes (Clip)
7/8/2015   
Height confers advantages in many sports—to a point. But what if you’re too tall to even safe ...
 
00:05:31
Sound Restoration (Clip)
6/10/2015   
Experimental physicist Carl Haber restores antique audio recordings too old, fragile, or ...
 
00:10:45
Living With Wildlife in the Bay Area (Clip)
5/13/2015   
With the ever shifting boundaries between humans and wildlife in the Bay Area, the da ...
 
00:05:00
Tofu (Clip)
4/8/2015   
Curious about Tofu? The folks over at Hodo Soy Beanery tell us everything we ever wanted to kn ...