TAXI CLRNC INTERP CAUSES A NEAR TAXI ERROR. TAXIING TFC.

Narrative

I MISINTERPRETED THE ASSIGNED TAXI RTE. EVEN THOUGH THE FO POINTED OUT MY MISTAKE TWICE; AND I COULD SEE THE TXWY DESIGNATOR SIGNS; I COULD NOT REALIZE MY MISTAKE. WE WENT 100-200 FT PAST A TXWY WE WERE SUPPOSED TO TURN ON. THE CAUSE OF THIS PROB WAS A HIGH LEVEL OF FATIGUE BROUGHT ON BY A LENGTHY DUTY PERIOD (11 HRS; 15 MIN SCHEDULE). AT THE TIME OF THE INCIDENT WE WERE 7 HRS INTO THE DUTY PERIOD AND MY BODY TIME WAS XX12 AM. RED-EYE FLYING DUTY PERIODS NEED TO BE RESTR DIFFERENTLY THAN THOSE SCHEDULED IN CONCERT WITH A CREW MEMBER'S CIRCADIAN CYCLES. 11 HRS IS TOO LONG. SUPPLEMENTAL INFO FROM ACN 296339: THE CREW HAD FLOWN 1 LEG FROM MEM TO LAS. THE CREW STARTED THE TRIP FEB/XX/95 AT XA00 PM. FLEW FROM MEM TO LAS. CREW SAT ON THE GND FOR 3 HRS. I FEEL THE CAPT WAS ACCUSTOMED TO USING B-5 TO TAXI TO RWY 25R IN HIS PREVIOUS GPS AT LAS. ALSO THE TIME OF DAY AND FATIGUE MAY HAVE PLAYED A PART IN THE MISUNDERSTANDING OF THE TAXI CLRNC. I ALSO BELIEVE OUR COMPANY COCKPIT RESOURCE MGMNT TRAINING WORKED HERE; WHERE MY ASSERTIVENESS GOT HIS ATTN; THAT THERE MAY BE A PROB. AND WE TOOK APPROPRIATE ACTION TO RESOLVE THE PROB.