A Bennion mother died four days after a traffic accident near Payson, which injured six other people, on the same day her son was released from the hospital.

Sharon McMillan, 36, died Friday afternoon at Mountain View Hospital in Payson of head and other injuries she sustained in the May 14 accident.Her 7-year-old son, Benjamin McMillan, was released Friday from the Mountain View Hospital.

And truck driver Melvin Nielson, 59, West Jordan, also involved in the 9:30 p.m. accident, remained in serious but stable condition Saturday afternoon at the University of Utah Medical Center's Burn Unit.

Utah Highway Patrol Trooper David Guest said the accident occurred when a large trailer hitched to a pickup being driven by Charles Dickenson, 27, Salt Lake City, overturned in the southbound traffic lane of Interstate 15 near Spring Lake.

Dickenson and a passenger were attempting to direct traffic around the trailer when a pickup truck and camper, driven by Bryce McMillan, 34, slowed to drive around the wreckage.

Guest said a semitrailer truck, driven by Nielson, apparently did not slow and struck the McMillan vehicle from behind. The semi's cab burst into flames.

Benjamin McMillan was thrown from the camper into the median. His mother was riding in the cab. The driver and two other family members were treated for injuries and released from Mountain View. Dickenson also received minor injuries.