AT42 FLC MISS TXWY TURN FROM TXWY Y TO TXWY Y1 AT MIA AND ARE REQUIRED TO REVERSE TAXI TO ORIGINAL ASSIGNED RTE TO RWY 27L.

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WHILE TAXIING TO RWY 27L FROM CTR REMOTE; WE WERE GIVEN INSTRUCTIONS TO TAXI VIA 'TXWY N; TXWY Y; TXWY Y1; TXWY 2; RWY 8; RWY 27L.' WE MISSED TXWY Y1 AND ARRIVED AT TXWY HH BEFORE STOPPING AND QUESTIONING GND. THEY ATTEMPTED A RERTE ON ANOTHER TXWY; BUT WE WERE EVENTUALLY TOLD TO MAKE A 180 DEG TURN ONTO TXWY Y1; AS PREVIOUSLY INSTRUCTED. ON ARRIVING AT TXWY Y1; WE CLRLY SAW THE SIGN HDG NBOUND ON TXWY Y (ABEAM FIRE HOUSE); BUT NOTICED THAT NO SIGN FOR TXWY Y1 SBOUND ON TXWY Y EXISTS. SUBSEQUENT TAXIED THROUGH THE SAME AREA DURING THE WK CONFIRMED SUSPICIONS. SIGN MISSING COULD BE DUE TO LCL CONSTRUCTION. AS A RESULT OF THIS SIT; ALL FO'S HAVE BEEN BRIEFED TO MAINTAIN ARPT DIAGRAM OUT EVEN AT OUR HUB; IN ADDITION TO QUESTIONING MY EVERY TURN IF IN DOUBT. NO CONFLICTS WITH TFC EXISTED. CTLR WAS VERY HELPFUL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: ANALYST CALLED FACILITY SPECIALIST. FACILITY SPECIALIST ADVISED THAT THE FAA; ARPT OFFICIALS AND USERS STARTED A 'RWY INCURSION ACTION TEAM' TO ADDRESS TXWY AND RWY PROBS/CONCERNS DUE TO PLANNED ARPT CONSTRUCTION OVER THE NEXT 3 YRS. TXWYS Y AND Y1 SIGNAGE HAVE ALREADY BEEN ADDRESSED. ALSO; TXWYS Y AND V ADJOINING RWY 27L. THE ARPT IS ALSO UNDER CONSTRUCTING A NEW RWY; 800 FT N OF RWY 27R.