A FLT INSTRUCTOR ALLOWED HIS STUDENT TO EXIT RWY 24 AT JXN ONTO RWY 14-32 RATHER THAN THE ASSIGNED TXWY C.

Narrative

I WAS APCHING JXN ARPT FROM THE E; WITH A STUDENT PLT ON BOARD. WE WERE MONITORING JXN TWR FROM ABOUT 12 MI OUT; PRIOR TO ANNOUNCING OUR INTENTION TO LAND. THE TWR FREQ WAS QUITE BUSY; WITH NUMEROUS ACFT APCHING TO LAND FROM VARIOUS DIRECTIONS. ATC WAS ISSUING INSTRUCTIONS TO NUMEROUS ACFT IN RAPID SUCCESSION. WE WERE FIT INTO THE SEQUENCE AND CLRED TO LAND ON RWY 24 FROM A BASE LEG; BUT WERE THEN ASKED TO CONTINUE ON A DOWNWIND TO FOLLOW ANOTHER ACFT. WE DID SO; AND UPON LNDG; WE WERE ASKED TO TURN L AT THE NEXT INTXN; AND ONTO TXWY C. THIS IS A COMPLEX INTXN; AT WHICH 2 RWYS AND 1 TXWY ALL CONVERGE AT THE SAME POINT. I INADVERTENTLY TAXIED ONTO THE INTERSECTING RWY; INSTEAD OF THE TXWY. WHILE ATTEMPTING TO TURN AROUND AND JOIN TXWY C; TWR ASKED ME TO HOLD MY POS; AND MAKE WAY FOR ANOTHER ACFT WHICH HAD LANDED JUST BEHIND ME (HE WAS JOINING TXWY C). TWR THEN CLRED ME TO CONTINUE TAXIING ALONG THE INTERSECTING RWY; AND EXIT AT THE END. TO MY KNOWLEDGE; NO OTHER ACFT WERE CLRED TO LAND OR DEPART FROM THIS RWY PRIOR TO MY ENTERING ONTO IT; AND SO THERE WAS APPARENTLY NO IMMEDIATE CONFLICT. AFTER CLRING THE RWY; WE WERE THEN CLRED TO TAXI TO OUR DEP RWY FOR A NORMAL DEP. I BELIEVE THAT FACTORS CONTRIBUTING TO MY TAXIING ONTO A RWY; INSTEAD OF THE TXWY; INCLUDE: 1) DEMANDS OF A VERY BUSY TFC PATTERN; REQUIRING CONTINUOUS SPLIT ATTN BY BOTH PLT AND TWR CTLR; 2) CONFUSING INTXN; WHERE 2 RWYS AND 1 TXWY ALL CONVERGE; AND 3) DEMANDS OF AN INSTRUCTIONAL SIT. WHEN TFC VOLUME BECOMES EXCESSIVE; ATC SHOULD EITHER INCREASE SPACING BTWN ARRS OR REQUEST THAT ACFT REMAIN CLR OF THE CLASS D AIRSPACE BRIEFLY. THESE STEPS WOULD REDUCE WORKLOAD FOR BOTH ATC AND PLTS IN THE PATTERN; ENABLING PLTS TO MAKE PROPER DECISIONS AND FOLLOW ATC INSTRUCTIONS. FLT INSTRUCTORS SHOULD ALSO CONSIDER SUSPENDING INSTRUCTION TEMPORARILY; AND TAKE FULL COMMAND OF THE ACFT TO AVOID ANY CONFUSION. IN FUTURE SITS WHERE THE TFC PATTERN IS SATURATED AND ATC WORKLOAD APPEARS EXTREMELY HIGH; I WILL BE MUCH MORE VIGILANT; AND POSSIBLY OPT TO REMAIN CLR UNTIL THE WORKLOAD QUIETS DOWN.