B757 CAPT REPORTS ABRUPT STOP TO AVOID FUEL TRUCK ENTERING TXWY C NEAR S AT LAX.

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WHILE TAXIING WBOUND ON TXWY C THERE WAS A LARGE SEMI SIZE FUEL TRUCK WBOUND TO OUR L ON ARPT ACCESS ROAD THAT PARALLELS TXWY C. BTWN TXWYS S AND C2 THE FUEL TRUCK MADE A HARD R TURN ONTO A XING ACCESS ROAD DIRECTLY IN FRONT OF US. THE FUEL TRUCK MANAGED TO GET A GOOD WAYS ON TO TXWY C BEFORE COMING TO A STOP; FORCING ME TO MAKE A FAIRLY RAPID STOP IN ORDER TO AVOID HITTING THE TRUCK. ONCE STOPPED WE INFORMED GND THAT WE WERE STOPPED AND THAT A LARGE ORANGE FUEL TRUCK HAD TURNED AND CROSSED IN FRONT OF US. GND RESPONDED THAT HE COULD SEE THAT WE WERE STOPPED AND THAT THE FUEL TRUCK WAS IN THE WAY. WE THEN CALLED THE FLT ATTENDANTS TO MAKE SURE THERE WERE NO INJURIES; WHICH THERE WERE NOT AND TO LET THEM KNOW WHAT HAD HAPPENED. THE FUEL TRUCK MANAGED TO BACK UP OFF TXWY C AND WE THEN PROCEEDED W ON TXWY C. WE COULD HEAR GND TALK TO CITY OPS AND IT APPEARED THAT THEY HAD DISPATCHED A CAR TO CHASE DOWN THE TRUCK. I AM NOT AWARE OF THE FUEL LOAD STATUS OF THE FUEL TRUCK BUT AS ONE MIGHT GUESS; A COLLISION WITH A LARGE FUEL TRUCK COULD BE A CATASTROPHIC EVENT!