I think that's the first truck. The 2nd truck slammed into the police car shoving it under the first truck while also knocking the first truck sideways.
God apparently has plans for that trooper here.
I can't see it like that . If it happenned the way you say, the front end on the rig is plastic. The Tractor weighs about 10,000 lbs. There would surely be at least a scratch on the rigs bumper...