This is a very good guess of the type of truck this could be. Compare the Wheel wells and notice their "square shape" near the edges. The taillight looks about the same also, as well as the rear bumber area.
I understand this main picture is the one that should be the only one to consider, and I think I now better understand that the picture that has the truck going to the right is actually a sort of road, because this truck is in the right most lane. The other picture of the one going the other way, it is in the lane beside it and there are left turn arrows painted on the pavement in front of that one. It just seems bizarre to have a similar looking truck coming back from that same direction, but I suppose it could be a different truck heading to the left in the other picture. But in any case, GREAT JOB in trying to get an identification picture of this truck. I think you may have it with the inserted picture.
JMO of course.