Narrative:

We were cleared to taxi to runway 17L. Approaching runway 17L I realized there were 2 hold short lines. I decided to take a conservative measure and hold short of the one furthest back. My first officer inquired tower about the non-standard marking and he said they use one for larger aircraft and that it didn't matter which one I use. I cannot believe the FAA allows this. These are non-standard markings and make it hard to determine (especially in low visibility) where to hold short of an active runway.

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Original NASA ASRS Text

Title: PLT RPTS NON STANDARD RWY HOLD SHORT LINES AT SDF.

Narrative: WE WERE CLRED TO TAXI TO RWY 17L. APCHING RWY 17L I REALIZED THERE WERE 2 HOLD SHORT LINES. I DECIDED TO TAKE A CONSERVATIVE MEASURE AND HOLD SHORT OF THE ONE FURTHEST BACK. MY FO INQUIRED TWR ABOUT THE NON-STANDARD MARKING AND HE SAID THEY USE ONE FOR LARGER ACFT AND THAT IT DIDN'T MATTER WHICH ONE I USE. I CANNOT BELIEVE THE FAA ALLOWS THIS. THESE ARE NON-STANDARD MARKINGS AND MAKE IT HARD TO DETERMINE (ESPECIALLY IN LOW VISIBILITY) WHERE TO HOLD SHORT OF AN ACTIVE RWY.

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.