When I heard of the train accident I thought lucky, then funny, then dismissed ... but it’s still curious in this timeline. The Q chatter suggests that the engineer in the train was warned of what was up ahead via use of a drone operated by the good guys. If the train had not slowed down the accident would have (obviously) much greater - and if it was to have slowed down then there must have been a warning. curiouser & curiouser!
If the truck was already on the tracks and a warning was issued (via helicopter/drone), then the train slowed down. This means there were many less injuries and fatalities than might have otherwise been the case. A FF gone bad?
Seems the engineer did the wise think and it worked out, fortunately. He probably did not want to come to a full halt and allow whoever was in that truck to attack the train. He took the truck out but did not damage the train to the point of killing passengers.