Narrative:

After landing on runway 14R at ord we were cleared by ground to taxi via the parallels to hold short of stub. I conferred with copilot and he agreed on what we thought was the runway 27L parallel. Once we turned left we saw white runway centerline and realized we were on runway 27L! We immediately cleared at next exit. No conflict. Runways and txwys are poorly marked and lit and should be improved.

Google
 

Original NASA ASRS Text

Title: AFTER LNDG FLT CREW NLOOKIG FOR TAXIWAY MISTAKENLY TAXIS ONTO RWY. MOVES RAPIDLY TO CLEAR RWY.

Narrative: AFTER LNDG ON RWY 14R AT ORD WE WERE CLRED BY GND TO TAXI VIA THE PARALLELS TO HOLD SHORT OF STUB. I CONFERRED WITH COPLT AND HE AGREED ON WHAT WE THOUGHT WAS THE RWY 27L PARALLEL. ONCE WE TURNED L WE SAW WHITE RWY CTRLINE AND REALIZED WE WERE ON RWY 27L! WE IMMEDIATELY CLRED AT NEXT EXIT. NO CONFLICT. RWYS AND TXWYS ARE POORLY MARKED AND LIT AND SHOULD BE IMPROVED.

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.