On June 13, 2004, about 8:39 p.m., a 1991 Kenworth tractor-auto transporter, traveling west on Interstate 30 (I-30), near Sulphur Springs, Texas, collided with a 2002 Hyundai Santa Fe sport utility vehicle (SUV) that was stopped in a 0.5-mile-long traffic queue in the right-hand lane at milepost 132.3. The force of the collision pushed the Hyundai forward, into and under the trailer of a 2000 Peterbilt tractor-semitrailer combination unit, which was in turn pushed forward into a 2003 Lincoln Navigator SUV. The Lincoln was subsequently pushed forward into the trailer of a 2000 Volvo tractor-semitrailer combination unit. A fire erupted, involving the Hyundai and the Peterbilt trailer. All four occupants of the Hyundai and the driver of the Kenworth truck were fatally injured. The two occupants of the Lincoln received minor injuries, and the occupants of the Peterbilt and Volvo trucks were not injured. At the time of the accident, the temperature was 80° Fahrenheit, the sky was clear with a visibility of 10 miles, and winds were southeast at 5.8 mph.