Narrative:

Taxi instructions were, 'taxi straight ahead on taxiway a, hold short of B1.' aircraft encroached onto B1. No aircraft conflicts noted. Sfo txwys a, B, B1, south and S1 at their confluence are very confusing and poorly marked. Callback conversation with reporter revealed the following information: reporter stated that part of the problem is ot being familiar witht the runway 10 complex when runway 10R and 10L are is use. The said taxi instructions, especially at night, can be very confusing.

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Original NASA ASRS Text

Title: RPTR CLAIMS AT SFO TXWY SIGNS AND MARKINGS WHEN TAXIING OUT OF THE N TERMINAL ARE CONFUSING AND POORLY MARKED.

Narrative: TAXI INSTRUCTIONS WERE, 'TAXI STRAIGHT AHEAD ON TXWY A, HOLD SHORT OF B1.' ACFT ENCROACHED ONTO B1. NO ACFT CONFLICTS NOTED. SFO TXWYS A, B, B1, S AND S1 AT THEIR CONFLUENCE ARE VERY CONFUSING AND POORLY MARKED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT PART OF THE PROB IS OT BEING FAMILIAR WITHT THE RWY 10 COMPLEX WHEN RWY 10R AND 10L ARE IS USE. THE SAID TAXI INSTRUCTIONS, ESPECIALLY AT NIGHT, CAN BE VERY CONFUSING.

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.