Columbia subject headings:
Harvard subject headings:
Bridges--Earthquake effects--California--San Francisco Bay Area.
California. Department of Transportation.
Earthquake resistant design--Government policy--California.
Earthquakes--California--San Francisco Bay Area.
Express highways--California--San Francisco Bay Area.
Loma Prieta Earthquake, Calif., 1989.
Viaducts--California--San Francisco Bay Area--Earthquake effects.
Viaducts--California--San Francisco Bay Area.
Princeton subject headings:
Loma Prieta Earthquake, Calif., 1989.
Roads--California--San Francisco Bay Region.
Viaducts--California--San Francisco Bay Region.