I found this on the Salt Lake Tribune:
A car-hauler semitrailer burned on Interstate 15 in southern Utah early Friday morning, police said.
The driver pulled over about 3 a.m. when his truck shut down as he drove north on Interstate 15 near New Harmony in Washington County, said Utah Highway Patrol spokesman Cameron Roden.
The engine started on fire after he pulled over, and the blaze grew to engulf all nine used vehicles on board and the truck itself.
I hope it was a jack cooper truck
cooper does not run utah……can’t find it