Narrative:

While taxiing to runway 11L for takeoff at tus, I failed to notice the green signs indicating the beginning of runway 11L. Thinking I was not at the beginning of runway 11L, I continued on the parallel taxiway crossing the perpendicular runway. Recommendations: red signs on both sides of taxiway, holdline, or turning line to taxiway 4.

Google
 

Original NASA ASRS Text

Title: FLT CREW OF MLG TAXIING TO TXWY 4 TAXIED PAST AND CROSSED PERPENDICULAR RWY.

Narrative: WHILE TAXIING TO RWY 11L FOR TKOF AT TUS, I FAILED TO NOTICE THE GREEN SIGNS INDICATING THE BEGINNING OF RWY 11L. THINKING I WAS NOT AT THE BEGINNING OF RWY 11L, I CONTINUED ON THE PARALLEL TXWY XING THE PERPENDICULAR RWY. RECOMMENDATIONS: RED SIGNS ON BOTH SIDES OF TXWY, HOLDLINE, OR TURNING LINE TO TXWY 4.

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.