SMA CONFUSED BY RWY SIGNAGE TAXIES BEYOND HOLD LINE.

Narrative

I WAS TAXIING FROM THE FBO FOR DEP AT HULMAN FIELD; AND I WAS NOT TOO FAMILIAR WITH THE RWY IN USE. FROM THIS SIGN I WAS LED TO BELIEVE THERE WAS A SEPARATE HOLD SHORT LINE FOR RWY 13/31 AND RWY 18/36. I WAS CLRED TO TAXI TO RWY 13/31 BUT I DID NOT REALIZE THAT THESE SEPARATE RWYS USED THE SAME HOLD SHORT LINE. I TAXIED PAST THE HOLD SHORT LINE FOR RWY 18/36 THINKING I WOULD SEE A NEW (DIFFERENT) HOLD SHORT LINE FOR RWY 13/31. I DID NOT. I ASKED THE CTL TWR FOR DIRECTIONS TO THE RUN-UP AREA FOR RWY 13/31 AND HE TOLD ME TO HOLD WHERE I WAS BECAUSE I ALREADY PASSED IT. I FINISHED MY CHKLIST QUICKLY; THEN DEPARTED. THIS INCIDENT OCCURRED DURING A PERIOD OF NONACTIVITY ON THE FIELD AND FORTUNATELY MY MISTAKE DID NOT ALTER ANY OPS AT THE FIELD. THIS INCIDENT OCCURRED BECAUSE I WAS NOT TOO FAMILIAR WITH THE AIRFIELD AND THE ARPT DIAGRAM I HAD LED ME TO BELIEVE THERE WERE SEPARATE HOLDING AREAS FOR THE DIFFERENT RWYS. I ALSO BELIEVE THE RWY SIGNS ALSO LED TO MY CONFUSION. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES THE ARPT DIAGRAM IN USE WAS A COMMERCIAL PUB BUT NOT THE INST DIAGRAM. IT WAS IN A SUBSCRIPTION OF ARPTS OF THE MIDWEST. IT IS VERY SIMILAR TO THE INSTRUCTION BOOK DIAGRAM. TWR SAID NOTHING MORE TO RPTR WHO COMPLETED HIS RUN-UP AND DEPARTED. HE BELIEVES THE SIGNAGE IS VERY CONFUSING; LEAVING A QUESTION AS TO WHERE THE HOLD SHORT LINE IS FOR RWY 13/31. HE HAD PERSONALLY NEVER SEEN THIS TYPE OF SIGNAGE BEFORE. CONSULTING WITH HIS FLT INSTRUCTOR HE LEARNED THAT HE KNEW OF THE SIGNAGE BUT HAD NOT USED THE RWY IN QUESTION; SO HAD NO PERSONAL EXPERIENCE WITH IT. HE FEELS THE SIGN IS VERY MISLEADING AND SOME CHANGE SHOULD BE MADE.