TAMPING MACHINE OWNED AND OPERATED BY CONTRACTOR WAS TRAVELING NORTH AND WORKING UNDER A TRACK AUTHORITY WITHIN CTC TERRITORY. AS HE APPROACHED THE CROSSING, THE CROSSING GATES STARTED TO LOWER. THEOPERATOR OF THE TAMPING MACHINE FAILED TO ENSURE GATES WERE FULLY LOWERED AND TRAFFIC STOPPED, AS REQUIRED BY RULE, BEFORE GOING THROUGH THE CROSSING AND DRIVER OF VEHICLE ATTEMPTED TO GO THROUGH CROSSING BEFORE THE GATES COMPLETED LOWERING AND WAS STRUCK BY TAMPING MACHINE.