1990 Interstate 75 fog pileup

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The 1990 Interstate 75 fog pileup was a traffic collision that occurred on the morning of December 11, 1990, on a section of Interstate 75 (I-75) near Calhoun, Tennessee, during dense fog which obscured the visibility of motorists. The collisions occurred in an area where fog is common and had been the site of previous multi-vehicle collisions caused by poor visibility. It consisted of a series of multi-vehicle collisions that ultimately involved 99 vehicles, and resulted in 12 deaths and 42 injuries. It was reportedly the largest motor vehicle collision in United States history when it occurred, in terms of the number of vehicles, and was the largest and second deadliest vehicle accident in Tennessee history behind the 1972 Bean Station bus-truck collision, which killed 14. Suspicion was raised as to whether a nearby paper mill operated by Bowater may have contributed to the foggy conditions. The disaster resulted in multiple safety improvements to the section of I-75 where the collision...

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