A320; ON LNDG ROLLOUT RWY 4; ENTERS RWY 31 AS OTHER ACFT DEPS OVER A320.

Narrative

EARLIER SEVERE WX HAD DELAYED ARRIVALS AND DEPS AT LGA. WX MOVED E; LEAVING LOW CEILINGS; SCUD; AND WET RWYS. LNDG RWY 4 LGA; DEP RWY 31. WE LNDED AT THE NORMAL TOUCHDOWN POINT WITH MEDIUM AUTO BRAKES (THIS IS THE MAX SETTING FOR LANDING); USED MAX REVERSE; HEAVY BRAKING BELOW 60 KTS; AND SLID TO A STOP WITH OUR NOSE ON RWY 31. I CHOSE TO STOP RATHER THAN CONTINUE THROUGH THE INTERSECTION WITH RWY 31 BECAUSE I HEARD THE TWR CLEAR AN ACFT FOR TKOF ON RWY 31 AS WE WERE ROLLING OUT; WITHOUT ANY COORD OR COOPERATION WITH US. AS I SLID TO STOP; I LOOKED TO THE RIGHT AND SAW THE LIGHTS OF THE ADVANCING ACFT. HE WAS ABLE TO LIFT OFF BEFORE REACHING ME AND PASSED OVERHEAD AT LOW ALT. AFTER THE ACFT PASSED; I ASKED THE CTLR IF HE HAD CLEARED THAT ACFT FOR TKOF AND HE SAID 'I THOUGHT YOU WERE GOING TO TURN OFF PRIOR. IT LOOKED TO ME THAT YOU WERE GOING TO TURN OFF PRIOR TO THE INTERSECTION.' I RESPONDED THAT HE HAD MADE A LOT OF ASSUMPTIONS. HE THEN CLEARED ME TO CONTINUE ACROSS RWY 31 AND TURN OFF TO THE R. WHEN I GOT TO THE TURNOFF; I COULDN'T EXIT BECAUSE THE THREE ACFT THAT HAD LANDED BEFORE ME WERE ON THE TXWY. I INFORMED THE TWR THAT I COULDN'T CLEAR; THE NEXT LNDG ACFT WENT AROUND. THIS IS A CONTINUING PROB AT LGA. THE CTLRS ARE CONDUCTING LAHSO OPS WITHOUT ANY COORD OR COOPERATION WITH THE PLTS. APPARENTLY; THERE IS A PROVISON IN THE CTLRS MANUAL WHICH ALLOWS THEM TO CLEAR AN ACFT TO TKOF ON AN INTERSECTING RWY IF THEY THINK THAT THE LNDG ACFT CAN TURN OFF PRIOR. THIS IS A VERY DANGEROUS PROCEDURE! THE CTLR CAN'T KNOW WHAT IS GOING ON IN THE COCKPIT OF EACH LNDG ACFT. ADDITIONALLY; ON THE A320; THE REVERSERS ARE SO LOUD THAT OFTEN WE CAN'T HEAR TRANSMISSIONS MADE WHILE WE ARE IN FULL REVERSE. ANY INSTRUCTIONS OR QUESTIONS THAT THE CTLR ISSUES AT THAT TIME WILL PROBABLY BE MISSED. AT BOS; WHEN WE CAN'T ACCEPT A LAHSO CLRNC PRIOR TO LNDG; THE CTLR WILL ASK US TO RPT WHEN WE HAVE THE INTXN MADE AFTER LNDG. AFTER HE RECEIVES THAT CALL FROM US; HE CLEARS THE ACFT FOR TKOF ON THE INTERSECTING RWY. THIS IS A MUCH SAFER PROCEDURE ALL AROUND. ALLOWING THE CTLR TO MAKE THE CALL ON HIS OWN ALSO EXPOSES HIM TO PRESSURE FROM HIS BOSS TO MAKE THE CALL EARLIER THAN HE OTHERWISE WOULD; OR IN MARGINAL SITS. REQUIRING THE PARTICIPATION OF THE LNDG PLT REMOVES THAT PRESSURE. IF WE DON'T STOP THIS 'VIRTUAL LAHSO;' EVENTUALLY THE 6 O'CLOCK NEWS WILL HAVE PICTURES ALONG WITH INTERVIEWS WITH BUREAUCRATS. CALLBACK CONVERSATION WITH THE RPTR REVEALED THE FOLLOWING INFO: RPTR ADVISED THAT HE HAS NOT ENCOUNTERED ANY SIMILAR INCIDENT SINCE THIS INCIDENT. RPTR EXPRESSED ADDITIONAL CONCERNS WITH THE LACK OF A PUBLISHED MISSED APCH PROC WITH THE LGA EXPRESSWAY VISUAL RWY 31 APCH.