Money quote:
Witnesses to the crash reported that the refuse truck entered the crossing after the gates were down.
But why?
For this to have been an accident means the driver willfully drove around the gates and then had a mechanical difficulty that excluded him from driving on. The train "just happened" to be filled with most of the Republicans in the House of Representatives.
Actually that is all the NTSB needed to say, and there was no good reason it took them this long to say it - Garbage truck driver crossed onto the tracks at the crossing after the gates were down; end of story.
And everyone can also forget all the “right wing” conspiracy theories about the Dims planning the mishap because the train was carrying so many GOP members of Congress.