C152 STUDENT PLT MISTAKENLY TURNED OFF LNDG RWY ON TO AN INTERSECTING RWY INSTEAD OF A TXWY TIE IN.

Narrative

I WAS ON MY FIRST SOLO CROSS-COUNTRY FLT AS A STUDENT PLT. I WAS DIRECTED TO POU TWR FOR LNDG AND DID SO WITHOUT DIFFICULTY; BUT THEN AFTER TOUCHING GND; SLOWED TO PULL OFF THE ACTIVE RWY AND FOUND MYSELF ON AN INTERSECTING RWY. WHILE I HAD NOT BEEN DIRECTED TO A SPECIFIC TXWY; FAULT IS OBVIOUSLY ENTIRELY MY OWN AS THE RWY OF COURSE DID NOT HAVE THE TXWY MARKINGS I WAS FAMILIAR WITH FROM MY GND SCHOOL. FORTUNATELY; I WAS THE ONLY PLT IN THE AREA AND THE INTERSECTING RWY WAS CLOSED ON THIS DAY. I IMMEDIATELY NOTICED MY MISTAKE ON TURNING; BUT AS THERE WAS NO OTHER TFC; I SIMPLY CONTINUED APPR0X 200 FT TO THE TXWY; EXITED THE SECOND RWY. I HAD IMAGINED MYSELF TAKING TO THE GRASS AS AN OPTION IN THAT MOMENT AFTER REALIZING WHERE I WAS; BUT THIS WAS NOT NECESSARY. I APOLOGIZED TO THE CTLR FOR THE MISTAKE ON THE NEXT RADIO CALL; WHO WAS KIND ENOUGH NOT TO CRITICIZE MY BLUNDER. THE REMAINDER OF THE FLT WAS UNEVENTFUL. THE MISTAKE; WHILE POTENTIALLY SERIOUS AS A RWY INCURSION; WAS WITHOUT CONSEQUENCE. IT WAS CAUSED BY A SIMPLE LACK OF EXPERIENCE; ALLOWING FOR AN INCORRECT QUICK DECISION. I HAD BEEN FAMILIAR WITH TXWY MARKINGS FROM GND SCHOOL; AND MY FLT INSTRUCTORS HAD DIRECTED ME CORRECTLY IN OUR DUAL CROSS-COUNTRY FLTS; BUT I AM USED TO UNCTLED ARPTS; WITH MOST OF MY FLT TIME ON A SINGLE SMALL LNDG STRIP. I HAVE SINCE REVIEWED MY GND SCHOOL SECTION ON ARPT MARKINGS AND A SUBSEQUENT SOLO CROSS COUNTRY TO A MULTI-STRIP ARPT WAS WITHOUT EVENT.