A B767 FLT CREW INADVERTENTLY TAXI ON THE WRONG TXWY AT MIA.

Narrative

CLRED TO RWY 9L VIA TXWY P. EXITED RAMP; SAW TXWY P SIGN AND RWY 9. THOUGHT I TURNED ONTO TXWY P; BUT WAS ON TXWY P ALREADY AND TURNED ON TXWY S. THE SIGN I SAW FOR RWY 9 WAS RWY 9R; NOT RWY 9L. HAD MENTAL PICTURE THAT I WOULD PARALLEL A RWY TO RWY 9L. THINGS DID NOT LOOK RIGHT AS THERE WAS A RWY STRAIGHT AHEAD. DID NOT LOOK RIGHT TO ME AS WE SHOULDN'T BE XING RWY 12 ON WAY TO RWY 9L. COPLT VERBALIZED IT ALSO; AND GND ALSO CAUGHT IT. WE TURNED R ONTO TXWY Q; ANOTHER R; AND THEN L; BACK ON TXWY P. THERE WAS NO OTHER TFC AROUND. I OBVIOUSLY MADE WRONG TURN BUT THE SYS WORKED AS MYSELF; THE FO; AND GND CTL ALL CAUGHT ERROR. I ALWAYS HAVE MY ARPT DIAGRAM OUT; BUT STILL MADE AN ERROR. MY INITIAL ERROR WAS SEEING SIGN FOR RWY 9R AND THINKING THAT WAS RWY 9L WHERE I WAS GOING. I ALWAYS TRY TO HAVE A MENTAL PICTURE OF WHERE I AM GOING; BUT MADE AN ERROR THIS TIME. I DON'T REGULARLY GO TO THIS ARPT; BUT I HAVE BEEN THERE MANY TIMES BEFORE AND SHOULDN'T HAVE MADE THIS MISTAKE. KEEP UP THE GOOD WORK. EVERYONE IS MORE AWARE THAN IN THE PAST THROUGH EDUCATION. AN ERROR CAN OCCUR ANY DAY; BUT AS LONG AS WE HAVE XCHKS; IE; PF; ATC; AND OUR OWN INNER FEELINGS; WE CAN AVOID A BAD OUTCOME.