M20C PLT HAS RWY INCURSION AT SBA.

Narrative

I HOLD A PVT PLT'S LICENSE; AN INST RATING; AND A GND INSTRUCTOR'S CERTIFICATE. I WAS DEPARTING SBA FOR THE FIRST LEG OF THE RETURN FLT. AT THE FBO; I CALLED FSS; RECEIVED A STANDARD BRIEFING; AND FILED AN IFR FLT PLAN. THE IFR FLT PLAN WAS BASED ON A SUGGESTED MOUNTAIN-XING RTE RECEIVED FROM AOPA PRIOR TO THE TRIP. ALTHOUGH CONDITIONS WERE VMC; I WAS CONCERNED ABOUT TRANSITIONING THE LA AIRSPACE AND XING THE MOUNTAINS. I FELT THE IFR FLT PLAN WOULD OFFER AN ADDITIONAL MEASURE OF SECURITY AND ASSISTANCE. AFTER STARTING THE ENG; I CHKED ATIS AND CALLED CLRNC DELIVERY; THEN CALLED GND CTL. I HAD THE COMMERCIAL CHART TXWY DIAGRAM FOR SBA; WHICH I HAD PRINTED OUT PRIOR TO THE TRIP; ON MY KNEE BOARD. I TOLD GND THAT I WAS NOT FAMILIAR WITH THE ARPT; AND ASKED HIM TO 'STAY WITH ME' THROUGHOUT TAXIING; WHICH HE DID; DIRECTING ME TO THE RUN-UP AREA FOR RWY 15L. THE GND CTLR WAS THOROUGH AND STAYED RIGHT ON THE FREQ WITH ME THROUGHOUT THE TAXIING TO THE RUN-UP AREA. UPON COMPLETING THE RUN-UP; I THOUGHT I NEEDED TO CONTINUE TO TAXI TO A HOLDING LINE FOR THE PARALLEL RWYS. I WAS EXPECTING A DEFINING CHANGE BTWN THE TXWYS AND THE RWYS; AND DID NOT RECONCILE THE ACTUAL ENVIRONMENT WITH THE TXWY DIAGRAM. I TAXIED TOWARDS THE RWYS LOOKING FOR ADDITIONAL SIGNS. THE HOLD SHORT LINE FOR RWY 15L HAD BEEN REPAINTED RECENTLY; AND WAS SMALLER IN SCALE THAN WHAT I HAD BEEN EXPECTING. ALTHOUGH I DID SEE THE LINE; IT DID NOT REGISTER AS A HOLD SHORT LINE. AS I WAS TAXIING FORWARD; IT REGISTERED THAT THE LINE I WAS LOOKING DOWN ON AND XING WAS THE HOLD SHORT LINE. I IMMEDIATELY STOPPED; BUT MOST OF THE PLANE WAS ALREADY OVER THE HOLD SHORT LINE. I CALLED GND TO TELL THEM THAT I HAD CROSSED THE HOLD SHORT LINE. 'GND: ACFT X' AND RECEIVED A REPLY 'ACFT X; STOP;' WHICH I ALREADY HAD DONE. I WAS INSTRUCTED BY GND TO CONTACT THE TWR; AND DID SO; STATING THAT I HAD CROSSED THE HOLD SHORT LINE WITHOUT A CLRNC. THE TWR GAVE ME A PHONE NUMBER TO CALL; I TAXIED BACK TO THE FBO; CALLED THE NUMBER; AND WAS TOLD THAT THE TWR HAD TO CALL AN IMMEDIATE GAR FOR AN INCOMING PLANE; WHICH I UNDERSTAND MAKES THIS CLASSIFIED AS AN INCURSION. THIS WAS SOLELY A RESULT OF MY FAILURE TO OBEY THE HOLD SHORT LINE. THE CONTRIBUTING FACTORS WERE MY DISTR BY CONCERNS ABOUT THE IMPENDING MOUNTAIN XING AND THE HIGH-DENSITY TFC I WOULD BE ENCOUNTERING SHORTLY AFTER TKOF. I WAS MENTALLY FOCUSING TOO MUCH ON THE TXWY DIAGRAM AND LOOKING FOR THE POSTED SIGNS I WAS EXPECTING TO SEE; AND NOT PAYING ADEQUATE ATTN TO THE MARKINGS. I HAD DONE ALL THE THINGS I TELL MY GND SCHOOL STUDENTS TO DO IN REGARDS TO GETTING TXWY DIAGRAMS PRIOR TO THE TRIP; HAVING THEM ORIENTED CORRECTLY ON YOUR KNEE BOARD; AND ASKING GND CTL FOR PROGRESSIVE TAXI ASSISTANCE. I HAVE THE FAA TXWY SIGNAGE SHEET ON MY KNEE BOARD FOR REF. WHAT I HAD NOT DONE; WAS TO PAY ADEQUATE ATTN TO THE MARKINGS; I REMEMBER LOOKING AT THE HOLD SHORT MARKINGS AND THINKING THAT THEY HAD BEEN REPAINTED RECENTLY DUE TO THE BLACK BACKGND. I SHOULD HAVE CONTACTED GND AGAIN BEFORE LEAVING THE RUN-UP AREA. A MINOR CONTRIBUTING FACTOR IS MY IMPRESSION THAT THE HOLD SHORT LINE AT RWY 15L APPEARED TO BE SMALLER IN SCALE THAN I HAVE PREVIOUSLY SEEN. PERHAPS IT WAS JUST MY IMPRESSION. THE GND CTLR WAS VERY HELPFUL AND DID EVERYTHING I ASKED. THE TWR WAS RIGHT ON TOP OF HER JOB IN SEEING THE SIT AND CALLING FOR A GAR ON THE INCOMING ACFT. I KNOW THE SIGNS AND MARKINGS; AND I KNOW THE RULES AND REGS. I DO NOT KNOW WHY THE HOLD SHORT LINE DID NOT REGISTER WITH ME. IF SOMEONE HAD ASKED WHAT THE LINE MEANT; I COULD HAVE TOLD THEM IMMEDIATELY WHAT IT WAS. I ALLOWED MYSELF TO FOCUS ON WHAT I WAS EXPECTING TO SEE RATHER THAN WHAT WAS IN FRONT OF ME. I DO KNOW THAT THIS HAS CAUSED ME TO SEE; RECOGNIZE AND MENTALLY CONFIRM ALL RWY AND TXWY MARKINGS AND SIGNS THAT I ENCOUNTER. ON THE RETURN TRIP TO NY; I FOUND THAT I WAS LOOKING AT ALL MARKINGS AND SIGNS; MENTALLY CONFIRMING WHAT THEY WERE; AND CONFIRMING APPROPRIATE ACTION. CONTINUING THIS SHOULD PREVENT ANY RECURRENCE; AND WILL BE A VALUABLE LESSON TO USE IN FUTURE GND SCHOOL CLASSES. THE ATC PEOPLE AT SBA WERE VERY PROFESSIONAL AND THOROUGH; BOTH BEFORE AND AFTER THIS OCCURRED. THERE WAS CERTAINLY NO REASON TO NOT CONTACT GND AGAIN PRIOR TO MOVING; BEING UNCERTAIN ABOUT THE SIGNAGE I SHOULD HAVE DONE SO.