Don’t know whether it was a company driver or a lease on driver. Many of those lease guys simply floor it while the company drivers are limited by their truck’s governor. The lese drivers used to pass me and everyone else on the interstates in the Midwest.
It’s possible the tractor hit a culvert in the median on his way across and ruptured the fuel tank causing the fire to erupt prior to hitting the bus.
There is no real median at that part of the 5...just a bunch of bushes separating the lanes.
Fedex doesn’t own any trucks, only the trailers. They contract with small fleet owners to haul their trailers. The fleet owner would normally be liable, but in an accident this bad, I suspect the victims will go after the deep pockets.