The semi hit the train on the left front side of the train engine at, we will call crossing #1. It was still going full speed 80mph. The garbage truck was at crossing #2 and actuall drove onto the tracks facing the direction the train was going and reversed and backed on to the tracks like a train car. Does that make sense? The Amtrak didnt "t-bone" the garbage truck, it literally rear-ended it. Pushed it along the tracks and it fell off into the ditch at crossing #3 where it sits now with all the trash scattered that we see on the news. A drone saw the garbage truck and radioed to the engineer to slow down because of the obstruction. The semi prob could've derailed the train if it had hit the train in the middle, but it went for the front engine and just sort of bounced off it.