GRADE CROSSING: TRAIN 318(07) WITH E/IDTX4631 AND 7 CARS STRUCK AN OCCUPIED BOX TRUCK AT HEREFORD ROAD/MP 251.83 ON THE UPRR SEDALIA SUBDIVISION. THE VEHICLE HAD ONE OCCUPANT WHO OPERATED THROUGH THECROSSING WITH CROSS BUCKS. OCCUPANT WAS A CONFIRMED FATALITY. E/IDTX4631 HAD EXTENSIVE DAMAGE WITH ABROKEN WINDSHIELD AND SIDE MIRRORS.