Narrative:

After landing on runway 12 at mia, we took the high speed turnoff, taxiway south. Ground told us to turn west (left) on the outer taxiway Q, but we were beyond the point that we could turn west and there was construction on taxiway P (the inner taxiway). He then instructed us to make 2 right turns back to taxiway Q. At this point there were 2 txwys. 1 about a 120 degree turn and 1 about a 180 degree turn. We took the first one by mistake which was taxiway T, which within a very short distance had us crossing runway 12. It was dark, and I did not notice any runway signs. Once we discovered we were on the runway, we quickly continued to the other side. Supplemental information from acn 485931: tower then called and said 'you missed taxiway Q, just crossed runway 12. No problem, stay with me, hold short of runway 12 at taxiway Y.' the rest of the taxi was normal. Runway 12 was in use for lndgs, but the closest aircraft was several mi out on final. In the future, I will stay heads up whenever we have a runway in front of us.

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Original NASA ASRS Text

Title: A TXWY AND RWY INCURSION AT MIA.

Narrative: AFTER LNDG ON RWY 12 AT MIA, WE TOOK THE HIGH SPD TURNOFF, TXWY S. GND TOLD US TO TURN W (L) ON THE OUTER TXWY Q, BUT WE WERE BEYOND THE POINT THAT WE COULD TURN W AND THERE WAS CONSTRUCTION ON TXWY P (THE INNER TXWY). HE THEN INSTRUCTED US TO MAKE 2 R TURNS BACK TO TXWY Q. AT THIS POINT THERE WERE 2 TXWYS. 1 ABOUT A 120 DEG TURN AND 1 ABOUT A 180 DEG TURN. WE TOOK THE FIRST ONE BY MISTAKE WHICH WAS TXWY T, WHICH WITHIN A VERY SHORT DISTANCE HAD US XING RWY 12. IT WAS DARK, AND I DID NOT NOTICE ANY RWY SIGNS. ONCE WE DISCOVERED WE WERE ON THE RWY, WE QUICKLY CONTINUED TO THE OTHER SIDE. SUPPLEMENTAL INFO FROM ACN 485931: TWR THEN CALLED AND SAID 'YOU MISSED TXWY Q, JUST CROSSED RWY 12. NO PROB, STAY WITH ME, HOLD SHORT OF RWY 12 AT TXWY Y.' THE REST OF THE TAXI WAS NORMAL. RWY 12 WAS IN USE FOR LNDGS, BUT THE CLOSEST ACFT WAS SEVERAL MI OUT ON FINAL. IN THE FUTURE, I WILL STAY HEADS UP WHENEVER WE HAVE A RWY IN FRONT OF US.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.