CAPT OF A DC9-50 TAXIED PAST THE RWY 28 HOLD SHORT LINE ACROSS THE APCH PATH OF THE RWY AT NIGHT DUE TO LACK OF OBSERVING MARKINGS; OR SIGNS; THAT WOULD INDICATE THE HOLD SHORT POS.

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ENCLOSED IS A COPY OF THE 10-9 PAGE TO HELP DESCRIBE THE INCIDENT. THE SIT IS THAT WE TAXIED THROUGH THE APCH PATH OF RWY 28 ON TXWY A. WE WERE GIVEN CLRNC TO TAXI TO RWY 28 VIA TXWYS J AND A AND HOLD SHORT OF RWY 28. WE HAD JUST FINISHED DEICING AT THE DEICING BAYS AND RECEIVED OUR CLRNC. WE HAD OUR CHKLISTS COMPLETED AND THE FO AND I HAD OUR TAXI CHARTS OUT (10-9 PAGE). WE TAXIED TO RWY 28 VIA TXWYS J AND A TO RWY 28. WE TAXIED VIA TXWY J AND A; BECAUSE OF THE ARRANGEMENT TXWY J INTERCEPTS TXWY A AND THE LACK OF RWY HOLD SHORT SIGNS FOR RWY 28; AND LACK OF HOLD SHORT MARKINGS ON TXWY A WE TAXIED PAST RWY 28; THROUGH THE RWY 28 APCH PATH ON TXWY A BUT NEVER ONTO RWY 28. RWY 28 LIES APPROX 200-300 FT W OF TXWY A. WE ADVISE YUL TWR WHAT HAD HAPPENED; BUT YUL TWR WAS NOT TOO UPSET OR CONCERNED BECAUSE HIS COMMENT (YUL TWR) WAS THAT YOU WERE NOT THE FIRST ONES TO DO THIS; TAKING ON TXWY A AND FORGETTING TO HOLD SHORT OF THE RWY 28 APCH AREA. YUL TWR ADVISED US THAT THERE HAVE BEEN SEVERAL INCIDENTS OF THIS INVOLVING OUR CARRIER AND SEVERAL ACRS. YUL TWR ADVISED TO GET WORD OUT AT OUR OPS ABOUT THIS SIT. I CONTACTED OUR AIR SAFETY DEP AND ADVISED THEM ABOUT THE TAXI SIT AT YUL ARPT. THEY WOULD INCLUDE A NOTAM TO AIRMEN OPERATING IN AND OUT THE DEICING BAYS AT YUL. I SUGGESTED TO OUR OPS THAT OUR CREWS EXERCISE EXTREME VIGILANCE WHEN TAXIING FROM THE DEICING BAYS TO RWY 28 VIA TXWY J AND A AT NIGHT. BECAUSE OF THE ARRANGEMENT OF THE BLUE TAXI LIGHTS ARE ORIENTED IT APPEARS THERE IS NO RWY OR DISPLACED THRESHOLD INTERSECTING THE TXWY. ALSO THERE IS VERY FEW SIGNS MARKING THE RWY AND TXWY HOLD SHORT MARKINGS TO RWY 28. I ALSO NOTICE THAT THERE ARE FLASHING AMBER LIGHTS AT ALMOST ALL OTHER TXWYS INTERSECTING THE RWYS AT YUL. I WOULD RECOMMEND THAT BOTH CREW MEMBERS BE VERY VIGILANT WHEN TAXIING AT AN UNFAMILIAR ARPT. IF WE WERE JUST A LITTLE MORE VIGILANT AND BETTER SIGNS AND LIGHTS MARKING RWY 28 AT YUL; WE WOULD HAVE PREVENTED THIS INCIDENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT NOTHING HAS BEEN DONE TO HELP CLARIFY THE HOLD SHORT MARKING AND SIGNAGE. HOWEVER; SINCE THE RWY 28 IS USUALLY USED FOR DEPS ONLY; AND THE PARALLEL RWYS 24 ARE USED FOR LNDG; THE XING OF THE RWY 28 FLT PATH IS NOT AS CRITICAL. HE HAS NOTIFIED HIS COMPANY FLT MGMNT REGARDING THIS PROB; BUT HAS NOT OBSERVED ANY NOTAMS OF CAUTION.