Narrative:

While working local 1; aircraft X was issued instructions to hold short of the runway. The pilot read back hold short instructions correctly but still attempted to cross. I observed the error and reiterated the hold short instructions. At this time aircraft Y was rolling for departure. Aircraft X did stop however the aircraft crossed the hold short line the proximity was 297 feet to aircraft Y departing at top speed. I believe the hold short lines are confusing at this location. This particular occasion could be a clear case of expectation bias.

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Original NASA ASRS Text

Title: An aircraft acknowledged instructions to hold short of a runway but attempted to cross the runway anyway. The aircraft crossed the hold short line.

Narrative: While working Local 1; Aircraft X was issued instructions to hold short of the runway. The pilot read back hold short instructions correctly but still attempted to cross. I observed the error and reiterated the hold short instructions. At this time Aircraft Y was rolling for departure. Aircraft X did stop however the aircraft crossed the hold short line the proximity was 297 feet to Aircraft Y departing at top speed. I believe the hold short lines are confusing at this location. This particular occasion could be a clear case of expectation bias.

Data retrieved from NASA's ASRS site 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.