ACFT MISSED INTENDED HIGHSPD TURNOFF. TURNOFF TAKEN WAS CLOSED RESULTING IN ACFT BEING TOWED TO GATE.

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NORMAL FLT ORD-EWR. ARR WITH ATIS INFO. ARPT NOTAMS RETRIEVED AND REVIEWED. CAPT FLYING. WE SET UP APCH TO RWY 4R; 30 DEGS FLAPS; AUTOBRAKES 2 SELECTED. A L TURN OFF TXWY L OR TXWY Y IF POSSIBLE OR CONTINUE TO NEXT TURNOFF WAS BRIEFED. WE WERE FOLLOWING A HVY B747. I STAYED 1/2 - 1 DOT ABOVE GS FOR WAKE AVOIDANCE. NORMAL LNDG; AUTOBRAKES FOLLOWED BY MANUAL BRAKES. I WAS WEARING BIFOCAL GLASSES FOR FIRST NIGHT LNDG. NORMAL OUTSIDE CLUES SEEMED DIFFERENT FROM WHAT I WAS USED TO; SO I DIDN'T FEEL COMFORTABLE EXITING ON A HIGHSPD THAT SEEMED TOO FAST. I BELIEVE MY PERIPHERAL VISION GAVE ME FALSE INDICATIONS OF BEING TOO FAST. I HAVE WORN CONTACTS FOR FLYING FOR THE LAST 16 YRS AND MY FIRST TIME TO WEAR A BIFOCAL. MY CONCERN WAS ACFT CTL AND THEN ATC. THE CTLR WAS VERY INSISTENT THAT I EXIT THE RWY FOR OTHER LNDG TFC FOLLOWING. I UNDERSTAND THEIR DILEMMA BUT MY CONCERN WAS SAFE CTL. I EXITED AT TXWY ZB ONLY TO FIND BARRICADES; DIMLY LIGHTED PREVENTING FURTHER TAXI. I STOPPED THE ACFT WELL SHORT OF THE BARRICADES. THE FO INFORMED THE TWR OF OUR LOCATION. I ASKED FOR A TUG. I CALLED OUR DISPATCHER AND HE VERIFIED THAT TXWY ZB WAS NOT NOTAMED OTS OR CLOSED. FORTUNATELY; WX WAS GOOD. HAD IT NOT BEEN I MIGHT NOT HAVE SEEN THE BARRICADE. THAT CLOSURE SHOULD HAVE BEEN NOTAMED.