On June 25, 2015, about 7:10 p.m., a 2007 Peterbilt truck-tractor in combination with a 2005 Great Dane semitrailer, operated by Cool Runnings Express, Inc., was traveling northbound in the center lane of Interstate 75, near Chattanooga, Tennessee, when the driver did not respond to the slow-moving traffic ahead and collided with the rear of a 2010 Toyota Prius. Traffic had slowed near milepost 11.7 because of road construction and a work zone lane closure at milepost 12. The truck-tractor continued forward and collided with seven additional vehicles, forcing them into subsequent collisions. Of the 18 vehicle occupants, six died and four were injured. A postcrash fire consumed one vehicle. The truck driver’s trip began earlier that day, about 5:16 a.m., in Haines City, Florida. His destination was the carrier terminal in London, Kentucky.