When a citation flight crew was cleared to cross runways 28R and left at oak on B they mistakenly tu...

Attributes
ACN	1203780
Time
Date	201409
Local Time Of Day	1201-1800
Place
Locale Reference	OAK.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Citation II S2/Bravo (C550)
Operating Under FAR Part	Part 91
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Multiengine Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 120 Flight Crew Total 6000 Flight Crew Type 400
Person 2
Function	Ground
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (mon) 6
Events
Anomaly	Conflict Ground Conflict Critical Deviation - Procedural Clearance Flight Deck / Cabin / Aircraft Event Other / Unknown Ground Incursion Runway

Narrative:

On the ground at oak we were cleared to taxi on C to cross 28R and 28L at B. We were told to expedite our taxi due to an airplane on a four mile final. At the runways; the signage was unclear and we could only see c and a signs. My copilot had me turn onto the taxiway between the two signs thinking it was bravo; and the ground controller told us we had turned on a. He asked if we had crossed the hold short line; my copilot mistakenly answered no and he told us to hold our position. Immediately my first officer restated our correct position and the controller told us to continue our taxi and requested the aircraft on final to go around.after we continued on a; we could then see the B sign to our right. Because of its placement between the two runways; it's not immediately visible from C unless you turn 90 degrees and face perpendicular to the runway. It is maybe 100 yards away from where you would expect it to be so it's not surprising that the supervisor advised they see problems like what we experienced a thousand times a year; and are hopeful to get better signage.

Original NASA ASRS Text

Title: When a Citation flight crew was cleared to cross runways 28R and L at OAK on B they mistakenly turned on A. The flight crew and the Ground Controller agreed that poor signage was the major contributing factor; the Controller stating they see similar events 'a thousand times a year.'

Narrative: On the ground at OAK we were cleared to taxi on C to cross 28R and 28L at B. We were told to expedite our taxi due to an airplane on a four mile final. At the runways; the signage was unclear and we could only see c and a signs. My copilot had me turn onto the taxiway between the two signs thinking it was bravo; and the ground controller told us we had turned on A. He asked if we had crossed the hold short line; my copilot mistakenly answered no and he told us to hold our position. Immediately my First Officer restated our correct position and the controller told us to continue our taxi and requested the aircraft on final to go around.After we continued on A; we could then see the B sign to our right. Because of its placement between the two runways; it's not immediately visible from C unless you turn 90 degrees and face perpendicular to the runway. It is maybe 100 yards away from where you would expect it to be so it's not surprising that the supervisor advised they see problems like what we experienced a thousand times a year; and are hopeful to get better signage.

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.

When a citation flight crew was cleared to cross runways 28R and left at oak on B they mistakenly turned on a. The flight crew and the ground controller agreed that poor signage was the major contributing factor; the controller stating they see similar events 'a thousand times a year.'