POSSIBLE RWY INCURSION IN ACR LGT XING THE RWY HOLD LINE.

Narrative

WHILE ON LNDG ROLLOUT ON RWY 4 AT ROC; I HEARD THE TWR TELL ANOTHER FLT TO HOLD UNTIL WE CROSSED HIS RWY. WE WERE BELOW 80 KTS WITH A COUPLE OF THOUSAND FT FROM THE INTXN. THE CAPT DIRECTED THE FO TO TELL TWR WE WOULD BE ABLE TO HOLD SHORT OF THE INTXN (TO LET THE OTHER ACFT TKOF). TWR ACKNOWLEDGED AND INFORMED THE OTHER ACFT. AT ABOUT 30 KTS; I NOTICED A WELL-WORN DOUBLE AND DASHED YELLOW LINE AHEAD OF THE ACFT. AT THE SAME TIME; THE ACFT STARTED TO DRIFT TO THE R (HIGHLY UNUSUAL) AND I NOTICED THE CAPT WORKING THE BRAKES AS THE ACFT GRADUALLY SLOWED. I SAW VERY HVY DEPOSITS OF RUBBER ON THE AREA WE WERE TRYING TO STOP. THE YELLOW LINE PASSED UNDER OUR NOSE AS WE CAME TO A STOP. IN THE LAST FEW FT OF ROLL; I FELT THE ANTI-SKID CYCLING ONCE OR TWICE. WE WERE 50 FT R OF CTRLINE ABOUT 5-10 DEGS OFF HDG. AS WE STOPPED; TWR CLRED THE OTHER ACFT TO TKOF. MY IMMEDIATE CONCERN WAS: ARE WE TOO CLOSE TO THE RWY? I ESTIMATED WE WERE STILL 100-130 FT FROM THE RWY AND A DC-10 WOULD HAVE NO PROB TAKING OFF SAFELY. I THEN LOOKED TO THE R AND SAW THE SMALL ACFT WAS ALREADY AIRBORNE AND WOULD PASS OUR LATERAL POS 50-100 FT AGL. THERE WAS NO INCURSION. THERE WAS NEVER AN UNSAFE SIT. I COULD NOT SEE THE YELLOW LINE WE PASSED FROM MY POS IN THE COCKPIT BUT I DID NOT THINK THE MAIN WHEELS HAD PASSED IT. TWR CLRED US TO USE THE INTERSECTING RWY TO TAXI TO OUR RAMP. WE COULD NOT FIND A DEPICTION OF THE 'HOLD LINE' ON THE ARPT DISPLAY AND I SENSED IT CAME UP ON US SOONER THAN WE EXPECTED. IN THE FEW SECONDS BTWN WHEN WE STOPPED AND THE TWR CLRED US TO TAXI THERE WAS CONCERN IN THE COCKPIT AS TO WHETHER WE HAD A BRAKE OR TIRE PROB. EVERYTHING LOOKED GOOD IN THE COCKPIT. NO PROBS WERE NOTED ON THE POSTFLT. MAINT CHKED OUT THE ANTI-SKID SYS WITH NO PROBS FOUND. IN RETROSPECT; WE SHOULD HAVE AT LEAST QUERIED TWR WHEN WE STOPPED IF OUR POS WOULD SUFFICE. AS IT WAS; THERE WAS NO COMMENT OR COM FROM TWR CONCERNING OUR POS OR THE FACT WE HAD ROLLED PAST A 'HOLD LINE' ON THE ACTIVE RWY.