Boi controller described an unauthorized runway crossing event involving an aircraft taxied to runwa...

Narrative:

A cessna called ready for taxi from the north ramp. As ground controller; I issued a taxi instruction to runway 10L via taxiway alpha. The pilot read back the taxi clearance correctly; 'runway 10L via alpha.' local control asked me if I had issued a taxi instruction to the cessna for runway 10R; instead of runway 10L. I told local control I had not issued 10R. Local control informed me that the cessna had called ready for take off on runway 10 while crossing runway 10L to go to runway 10R. No other traffic was affected; as there were no aircraft on final; or in position; for runway 10L at the time. The west portion of taxiway alpha is sometimes confusing to pilots; as it becomes taxiway juliet. Signage is poor as well. Wig-wags may have prevented the confusion.

Original NASA ASRS Text

Title: BOI Controller described an unauthorized runway crossing event involving an aircraft taxied to Runway 10L but which continued to Runway 10R; the reporter suggesting a need for improved signage and 'wig-wag' lights.

Narrative: A Cessna called ready for taxi from the north ramp. As Ground Controller; I issued a taxi instruction to Runway 10L via Taxiway Alpha. The pilot read back the taxi clearance correctly; 'Runway 10L via Alpha.' Local Control asked me if I had issued a taxi instruction to the Cessna for Runway 10R; instead of Runway 10L. I told Local Control I had not issued 10R. Local Control informed me that the Cessna had called ready for take off on Runway 10 while crossing Runway 10L to go to Runway 10R. No other traffic was affected; as there were no aircraft on final; or in position; for Runway 10L at the time. The west portion of Taxiway Alpha is sometimes confusing to pilots; as it becomes Taxiway Juliet. Signage is poor as well. Wig-wags may have prevented the confusion.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	968707
Time
Date	201109
Local Time Of Day	1201-1800
Place
Locale Reference	BOI.Airport
State Reference	ID
Aircraft 1
Make Model Name	Cessna Aircraft Undifferentiated or Other Model
Flight Phase	Taxi
Flight Plan	VFR
Person 1
Function	Ground
Qualification	Air Traffic Control Developmental
Events
Anomaly	Deviation - Procedural Clearance Ground Incursion Runway

Boi controller described an unauthorized runway crossing event involving an aircraft taxied to runway 10L but which continued to runway 10R; the reporter suggesting a need for improved signage and 'wig-wag' lights.