Narrative:

Taxiing for takeoff in omaha, cleared to taxi to runway 35. As we approached a turn on the taxiway the captain said, 'we are cleared to runway 35, correct?' I answered yes and looked down at the taxi chart (airport diagram) to confirm our route. As I looked up captain taxied across hold short line to cross the runway thinking it was runway 32L. By the time I looked up I realized we crossed runway 35. I told the captain he just crossed runway 35 and I notified ground control. They instructed us to turn around and taxi back to runway 35 and said there was no problem with the crossing. I believe the main cause of the error was fatigue. Both pilots commute and had been awake approximately 14 hours and this was the first leg of a 3 leg, 9 1/2 hour duty period. We started out fatigued. I also believe poor airport markings are a cause. It is very difficult to navigation and distinguish runways from txwys at night. I also think I should have been more aggressive because I wasn't sure where we were and I should have told the captain to stop until I or we were sure we were crossing runway 32L and not runway 35.

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Original NASA ASRS Text

Title: WHILE TAXIING FOR TKOF AT NIGHT, AN ACR CAPT TAXIED ACROSS THE RWY ASSIGNED BY GND CTL. THE FO WAS CONSULTING THE ARPT DIAGRAM TO CONFIRM THE RTE AND HAD NOT HAD THE CHANCE TO INTERVENE. THE FO CITES FATIGUE AS THE MAIN CAUSE OF THE ERROR.

Narrative: TAXIING FOR TKOF IN OMAHA, CLRED TO TAXI TO RWY 35. AS WE APCHED A TURN ON THE TXWY THE CAPT SAID, 'WE ARE CLRED TO RWY 35, CORRECT?' I ANSWERED YES AND LOOKED DOWN AT THE TAXI CHART (ARPT DIAGRAM) TO CONFIRM OUR RTE. AS I LOOKED UP CAPT TAXIED ACROSS HOLD SHORT LINE TO CROSS THE RWY THINKING IT WAS RWY 32L. BY THE TIME I LOOKED UP I REALIZED WE CROSSED RWY 35. I TOLD THE CAPT HE JUST CROSSED RWY 35 AND I NOTIFIED GND CTL. THEY INSTRUCTED US TO TURN AROUND AND TAXI BACK TO RWY 35 AND SAID THERE WAS NO PROB WITH THE XING. I BELIEVE THE MAIN CAUSE OF THE ERROR WAS FATIGUE. BOTH PLTS COMMUTE AND HAD BEEN AWAKE APPROX 14 HRS AND THIS WAS THE FIRST LEG OF A 3 LEG, 9 1/2 HR DUTY PERIOD. WE STARTED OUT FATIGUED. I ALSO BELIEVE POOR ARPT MARKINGS ARE A CAUSE. IT IS VERY DIFFICULT TO NAV AND DISTINGUISH RWYS FROM TXWYS AT NIGHT. I ALSO THINK I SHOULD HAVE BEEN MORE AGGRESSIVE BECAUSE I WASN'T SURE WHERE WE WERE AND I SHOULD HAVE TOLD THE CAPT TO STOP UNTIL I OR WE WERE SURE WE WERE XING RWY 32L AND NOT RWY 35.

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.