FHP diagram of the crash.
A couple of things are clear to me:
Terrible tragedy.
Terrible intersection.
Intersections are built-in confrontations. This one appears much worse -- a coffee / truck stop that should really only be available to 1 side of traffic. Was the truck driver going down this local road, or stopping at the stop ?
A roundabout or traffic circle here would have eliminated the confrontation, as well as relocating the incorrectly placed Gas/Coffee stop to something slightly off the roadway, accessible to both sides, and still visible from the road. But that costs more.
I can't recall any roads with junctions like that in the UK. To be able to cross the path of 2 lanes of a highway/motorway is not only not allowed but not possible. Such places have traffic lights, interchanges or roundabouts. Too dangerous.