About 9:10 a.m. on December 11, 1990, during fog on Interstate 75 near Calhoun, Tennessee, 99 vehicles were in multiple-vehicle chain-reaction collisions that killed 12 people and injured 42 others. The safety issues discussed in this report are nonuniform driver behaviour during limited-visibility conditions, detection of limited-visibility conditions, limited-visibility countermeasures, and hazardous materials container performance. As a result of its investigation, the Safety Board made recommendations addressing these issues to the United States Department of Transportation; the Federal Highway Administration; the National Highway Traffic Safety Administration; the Tennessee Department of Transportation; the Tennessee Highway Patrol; the American Association of Motor Vehicle Administrators; the Research and Special Programs Administration; Hercules, Incorporated; the Charleston Volunteer Fire Department; the American Automobile Association; and the American Driver and Traffic Safety Education Association. (Author/publisher)
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