A C152 PVT PLT INCURS THE WRATH OF THE GND CTLR AFTER GETTING LOST IN SEARCH OF A TXWY TO END OF RWY 24 AND THEN XING THE HOLD SHORT LINE FOR RWY 24 A BDR; CT.

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I HAD JUST STOPPED AT THE FBO IN GA AT BDR FOR A COFFEE BREAK AFTER A 2 1/2 HR XCOUNTRY AND WAS ABOUT TO FINISH MY FINAL LEG TO DXR. I STARTED UP THE PLANE AND CALLED GND. THEY TOLD ME TO TAXI TO RWY 24 VIA TXWY D. AS I WAS TAXIING; GND TOLD ME TO PULL TO THE L OF TXWY D AND COMPLETE MY RUN-UP OFF THE TXWY SO THAT A MOONEY BEHIND ME COULD PASS. I PULLED OFF AND COMPLETED MY RUNUP. TXWY D JOINS RWYS 24 AND 29 AT THE POINT WHERE THEY INTERSECT AND I BECAME CONFUSED BY THE SIGNS FOR THE RWYS AT THIS INTXN. I THOUGHT THAT THE SIGN POINTING TO RWY 24 WAS TELLING ME TO TAXI DOWN A PARALLEL TXWY (EVEN THOUGH THIS TXWY WAS NOT IN THE AFD); SO I FOLLOWED THIS TXWY. AS I PROCEEDED; I REALIZED THAT THIS WAS A DEAD-END. GND THEN CALLED ME AND TOLD ME THAT THERE WAS NO TXWY TO THE BEGINNING OF RWY 24 (I GOT THE IMPRESSION THIS HAPPENS A LOT!) AND THAT I SHOULD DO A 180 DEG TURN AND HOLD SHORT. I TURNED AROUND AND PROCEEDED BACK TO THE HOLD SHORT LINE AT THE INTXN OF THE RWYS. BY NOW I WAS STARTING TO GET CONFUSED AND I HELD SHORT 3 FT OVER THE HOLD SHORT LINE. I SWITCHED TO THE TWR FREQ AND THE CTLR SHOUTED AT ME TELLING ME I HAD CROSSED THE HOLD SHORT LINE. I APOLOGIZED AND WAITED FOR A CLRNC; WHICH CAME A FEW MINS LATER. THE MISTAKE WAS ENTIRELY MY OWN CAUSED BY ME BEING TIRED AFTER A XCOUNTRY THAT WAS PROBABLY A BIT TOO LONG FOR A ROOKIE PLT!