About 1:45 p.m. on May 4, 1987, while traveling eastbound on Interstate 10 (I-10) in Beaumont, Texas, a tractor-semitrailer (truck) operated by Graebel Van Lines, Inc. (GVL), Jackknifed in the center lane, veered leftward across the left land and median strip, and struck a Trailways bus traveling westbound on I-10 in the left lane. A small fire which started in the bus below the driver's seating area was quickly extinguished by a passerby. The busdriver and 5 bus passengers sustained fatal injuries, 17 bus passengers sustained serious to minor injuries, and 6 bus passengers were not injured. The truck driver and helper sustained moderate and minor injuries, respectively. It was raining at the time of the accident.