Narrative:

Location: runway 27L pad at ord. Taxi clearance to runway 22L via taxiway B and taxiway D. Approaching runway 27L pad tower told us we could cut diagonally across the runway 27L pad and we were asked if we could accept an immediate takeoff, with an aircraft on 1 1/2 mi final. I normally shy away from accepting immediate takeoff clrncs. But we had completed the checklist. Completed the briefing. This was our fourth trip together this month, and we were running 25 mins late, due to a gate change and late boarding passenger. So, I accepted the immediate takeoff clearance. Unfortunately, as I cut across the pad, instead of our normal routing of squaring off the turn, I headed for runway 22L intersection Q, instead of full length from taxiway D. The first officer and tower caught my error at the same time, but I was too far into intersection Q to enable a turn back into the runway 27L pad. Because I had encroached into the clearway for runway 27L, tower told the aircraft on final to go around, and then told us to taxi onto runway 22L and exit downfield. I either didn't hear the part about downfield, or it didn't register in my mind, and I turned left onto the runway, instead of right, to clear the runway in the most expeditious manner at taxiway D. This kept me in the clear zone for runway 27L, and caused another aircraft to go around, not a good day. Factors: because we left the gate 26 mins late, I was probably subconsciously hurrying. I accepted an immediate takeoff clearance when I was still over 1000 ft from the hold short, causing me to rush for the runway after the error was committed. It seemed logical to back-taxi and exit the runway in the most expeditious manner, rather than taxi down the runway 1800 ft to take a reverse hi speed, so I apparently heard what I expected to hear, not what was actually said. Although there is signage at both intxns for runway 22L, and the intersection for runway 27L, the area is very confusing, and if you hurry through this area, you are asking for trouble.

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Original NASA ASRS Text

Title: TAXIING B757 CROSSES PAD FOR ONE RWY BUT ENTERS ACTIVE RWY TXWY AT INTXN FORCING GAR.

Narrative: LOCATION: RWY 27L PAD AT ORD. TAXI CLRNC TO RWY 22L VIA TXWY B AND TXWY D. APCHING RWY 27L PAD TWR TOLD US WE COULD CUT DIAGONALLY ACROSS THE RWY 27L PAD AND WE WERE ASKED IF WE COULD ACCEPT AN IMMEDIATE TKOF, WITH AN ACFT ON 1 1/2 MI FINAL. I NORMALLY SHY AWAY FROM ACCEPTING IMMEDIATE TKOF CLRNCS. BUT WE HAD COMPLETED THE CHKLIST. COMPLETED THE BRIEFING. THIS WAS OUR FOURTH TRIP TOGETHER THIS MONTH, AND WE WERE RUNNING 25 MINS LATE, DUE TO A GATE CHANGE AND LATE BOARDING PAX. SO, I ACCEPTED THE IMMEDIATE TKOF CLRNC. UNFORTUNATELY, AS I CUT ACROSS THE PAD, INSTEAD OF OUR NORMAL ROUTING OF SQUARING OFF THE TURN, I HEADED FOR RWY 22L INTXN Q, INSTEAD OF FULL LENGTH FROM TXWY D. THE FO AND TWR CAUGHT MY ERROR AT THE SAME TIME, BUT I WAS TOO FAR INTO INTXN Q TO ENABLE A TURN BACK INTO THE RWY 27L PAD. BECAUSE I HAD ENCROACHED INTO THE CLEARWAY FOR RWY 27L, TWR TOLD THE ACFT ON FINAL TO GAR, AND THEN TOLD US TO TAXI ONTO RWY 22L AND EXIT DOWNFIELD. I EITHER DIDN'T HEAR THE PART ABOUT DOWNFIELD, OR IT DIDN'T REGISTER IN MY MIND, AND I TURNED L ONTO THE RWY, INSTEAD OF R, TO CLR THE RWY IN THE MOST EXPEDITIOUS MANNER AT TXWY D. THIS KEPT ME IN THE CLR ZONE FOR RWY 27L, AND CAUSED ANOTHER ACFT TO GAR, NOT A GOOD DAY. FACTORS: BECAUSE WE LEFT THE GATE 26 MINS LATE, I WAS PROBABLY SUBCONSCIOUSLY HURRYING. I ACCEPTED AN IMMEDIATE TKOF CLRNC WHEN I WAS STILL OVER 1000 FT FROM THE HOLD SHORT, CAUSING ME TO RUSH FOR THE RWY AFTER THE ERROR WAS COMMITTED. IT SEEMED LOGICAL TO BACK-TAXI AND EXIT THE RWY IN THE MOST EXPEDITIOUS MANNER, RATHER THAN TAXI DOWN THE RWY 1800 FT TO TAKE A REVERSE HI SPD, SO I APPARENTLY HEARD WHAT I EXPECTED TO HEAR, NOT WHAT WAS ACTUALLY SAID. ALTHOUGH THERE IS SIGNAGE AT BOTH INTXNS FOR RWY 22L, AND THE INTXN FOR RWY 27L, THE AREA IS VERY CONFUSING, AND IF YOU HURRY THROUGH THIS AREA, YOU ARE ASKING FOR TROUBLE.

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.