TANDEM DUMP TRUCK DRIVER WAS USING A ROAD THAT IT WAS NOT COMMUNICATED TO FEREBEE CORP THIS DRIVER WOULD BE USING. ARTICULATED TRUCK DRIVER DID NOT SEE THE DUMP TRUCK UNTIL IT WAS TOO LATE TO AVOID A COLLISION. ARTICULATED TRUCK HIT DUMP TRUCK BED, BED HIT CAB & KNOCKED DRIVER INTO STEERING WHEEL. TANDEM FRAME WAS BENT- TOTAL LOSS. ARTICULATED TRK DAMAGE UNKNOWN.