A fiery crash on Interstate 15 near Willard, Box Elder County early Saturday killed a Spanish Fork man. The Salt Lake Tribune reports that the victim was 42-year old Randy D. Anderson.Witnesses told the Utah Highway Patrol that Anderson’s camper shell-equipped Ford pickup was traveling north at a high rate of speed when it attempted to take the 351 exit, blew a stop sign, crossed three lanes of travel, and slammed into a guard rail, vaulting the vehicle into the air. The truck careened down a hill and rolled, coming to rest about 150 feet later. Anderson was reportedly still in the truck when it caught fire.