Re: Stacking freeways

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Article #402

#402

From: Paul S. Highland
Date: Thu, 09 Aug 2001 15:56

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Vincent Valencio wrote:

> What has happened to the double Decker freeway in San Francisco?  You know the
> one that has collapsed in the earthquake. Have they rebuilt it stronger then before?

The freeway that collapsed in the Loma Prieta quake in 1989 was a section of I-880 in Oakland.  It
has since been rebuilt on a slightly different alignment as a single-level structure.  (Took 'em
long enough to do it, too.)

Two other double-deck freeways in San Francisco were damaged.  The Embarcadero Freeway was torn down
completely, and a section of US-101 was single-decked, if I recall correctly.

I believe all those structures were built in the 1950s with inadequate bracing.  While construction
standards have improved vastly since then, many people might still have fears about double-deck
structures being unsafe.

=== Paul S. Highland

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