Seatbelts Save Lives: The Loma Prieta Earthquake of 1989

Looking at the collapsed structure of the Cypress Street Viaduct after the Loma Prieta earthquake of 1989, one would probably guess that very few of the 77 people on the lower deck survived. Unbelievably, the death count was only 35 on the lower deck, leaving 42 survivors for a survival rate of 55%.

If you weren't wearing your seat belt, the odds of survival were 41%, whereas if you were wearing your seat belt, the odds of survival soared to 71%.

Some people were just unlucky that day. One car was crushed downward to the frame rail and then totally consumed by fire. A full size van was crushed to a height of two feet. A full size car was crushed down to one to two feet. A "bent cap", a section of concrete that is lower than the surrounding concrete and joins sections of freeway together, crushed the driver's compartment of another car completely.

For more information, see the original CHP reports of the structure collapse at:

https://archive.org/details/1989lomaprietaea1989cali
https://archive.org/details/lomaprietaearth1990cali_0

Warning: Not an easy read.

Comments

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