2 ACFT; 1 TKOF AND 1 LNDG ON INTERSECTING RWYS HAVE TO ABORT TKOF AND GAR.

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WE WERE CLRED TO TKOF ON RWY 1R AT SFO. WE WERE VERY HVY (180000 POUNDS) AND HAD A XWIND OF 280 DEGS AT 14 KTS. MIN PWR IS REQUIRED TO BE USED UNTIL AT THE 'TKOF PWR POINT' WHICH IS 600 FT DOWN THE RWY DUE TO THE CLOSE PROX OF CARS ON THE FREEWAY BEHIND THE 'END' OF THE RWY 14. THE RESULT WAS IT TOOK US AN EXTREMELY LONG PERIOD OF TIME TO GET TO THE 'TKOF PWR POINT.' ALSO DUE TO THE XWIND OUR PROCS CALL FOR DELAYING FULL PWR ON #2 ENG UNTIL WE ARE ROLLING FORWARD. THIS FURTHER DELAYED AN ACCELERATED TKOF. THE TWR INSTRUCTED US TO ABOUT THE TKOF WHICH WE DID AT 105 KTS. OUR ROLLOUT CARRIED US THROUGH THE APCH END OF RWY 28L BEFORE WE COULD STOP; AND AN ACFT ON SHORT FINAL WAS GIVEN A GAR. I DID NOT FEEL A COLLISION WAS IMMINENT; BUT THE CALL FOR US TO ABORT THE TKOF DID NARROW THE DISTANCE BTWN ME AND THE LNDG ACFT. UNDER NORMAL CIRCUMSTANCES WITH A MUCH LIGHTER ACFT AND NO XWIND I BELIEVE THERE WOULD HAVE BEEN NO PROBLEM. IN HINDSIGHT IT APPEARS THAT WE SHOULD HAVE BEEN ALLOWED TO CONTINUE THE TKOF; AND THE LNDG ACFT SENT AROUND. THE OTHER SCENARIO WOULD HAVE ME RECEIVING THE ABORT CALL MUCH EARLIER IN THE TKOF WHERE I COULD HAVE HELD SHORT OF THE LNDG RWY AND NOT CAUSE A GAR. LATER I LEARNED THAT CTLR TRAINING WAS IN PROGRESS. I BELIEVE OUR 'HVY' GROSS WT AND INABILITY TO EXPEDITIOUSLY TAXI ONTO THE RWY AND TKOF CAUGHT THE TRAINEE UNAWARE AND DESTROYED HIS TIMING.