Interesting statements and questions to be answered.
A) Gate failed in down position.
B) 12 minutes of block traffic.
C) Signal maintainer on scene.
D) Dispatch of trains notification?
E) Who sent the maintainer?
F) Why did the train not stop to flag?
The short story is going to be that the signal maintainer turn off the grade protection system, which caused the accident. The long story is why there was so many points of failure that occur before the train slammed into the truck.
The amount of errors that are required for this type of accident.
Story #1
A few weeks ago the at grade crossing near the beef plant in Liberal KS, one of the arms got damage in a wind storm. I call it in, and found out they had already been notified. The maintainer was enroute, but several trains got there before the maintainer. While the trains did not stop and flag, all were going at a restricted speed and blowing the horn hard as they approached that crossing. Other than one of the arm broken off the light were flashing as normal.
Story #2
A CSX train is order to park on a siding in Fonda NY. Conductor dismount and walk over to the grade crossing control to turn off the circuit for the track that he is on. He flip the switch but the arms stay down and light keep flashing. So he flips the other two switches, and the light go out and the arms go up. Car cross on to the track, and get T-boned by a train on another track. (Three track in town). Driver was killed.