CRJ FLT CREW EXPERIENCES A RUNWAY INCURSION AT AEX.

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DURING THE DEP BRIEFING PRIOR TO PUSHBACK; I HAD INADVERTENTLY IDENTED RWY 14 AS THE DEP RWY. I'D OPERATED INTO AND OUT OF AEX MANY TIMES OVER THE LAST 10 YRS AND UNDERSTOOD RWY 14/32 TO BE THE PRIMARY RWY UNDER NORMAL CONDITIONS. MY FO IMMEDIATELY REMINDED ME THAT RWY 14 WAS UNAVAILABLE AND THE RWY 18 WAS BEING USED FOR DEPS. I CHANGED THE DEP RWY IN THE FMS TO RWY 18; AND COMPLETED THE BRIEFING AND ALL CHKLISTS. AS THE PUSHBACK BEGAN; WE WERE MOMENTARILY DISTR BY A PROB WITH THE TUG THAT WAS SOON CORRECTED. AFTER PUSHBACK WAS COMPLETE; MY FO CALLED FOR A TAXI CLRNC; AND WE WERE CLRED TO TAXI TO RWY 18. THE PUSHBACK LEFT US FACING NE; TOWARD THE TERMINAL BUILDING. UPON RECEIVING THE TAXI CLRNC; I MADE A L TURN AND JOINED TXWY A. BY NOW; MY PRIOR CONDITIONING (THINKING OF RWY 14/32 AS THE 'PRIMARY RWY') REASSERTED ITSELF AND I BEGAN TAXIING TO RWY 14. INSTEAD OF TURNING R ONTO TXWY B TO APCH RWY 18; I CONTINUED ON TXWY A TO APCH RWY 14. AS FAR AS I WAS CONCERNED; NOTHING OUT OF THE ORDINARY WAS HAPPENING. I WAS MAINTAINING A CONSERVATIVE TAXI SPD SINCE TXWY A HAD A SLIGHT ZIGZAG CHARACTER TO IT ON THAT PART OF THE ARPT. AS WE APCHED RWY 18 AT TXWY A MY FO (WHO LATER CONFESSED SHE WAS BY THIS TIME THOROUGHLY SATISFIED THAT I WAS COMPETENT; CONFIDENT; AND SEASONED PIC) BEGAN TO SENSE THAT SOMETHING WAS WRONG. UPON RECOGNIZING THAT I INTENDED TO ENTER RWY 18/36 ON TXWY A; SHE ASKED 'WHAT ARE YOU DOING?' SHE DID NOT TAKE POSITIVE ACTION TO STOP THE ACFT BECAUSE ON SOME GUT LEVEL; SHE BELIEVED THAT I DID; IN FACT; KNOW WHAT I WAS DOING. AT THE SAME MOMENT MY FO SPOKE; THE GND CTLR TOLD US TO TURN R ONTO RWY 18 AND CONTACT THE TWR ON 127.35 MHZ. ALL THIS HAPPENED AS THE ACFT WAS ENTERING THE RWY AND APCHING THE RWY CTRLINE. THE TWR FURTHER INSTRUCTED US TO BACK-TAXI ON RWY 18; MAKE A 180 DEG TURN AT THE END; AND ADVISE WHEN READY TO TAKE OFF. IT WAS ONLY WHEN THE GND CTLR TOLD US TO TURN R ONTO RWY 18 THAT I REALIZED WHAT I HAD DONE. THE REMAINDER OF THE DEP WAS NORMAL; AND THERE WAS NO FURTHER MENTION OF THE EVENT BY ATC. I RECENTLY COMPLETED FAA-MANDATORY RWY INCURSION AWARENESS TRAINING VIA MY COMPANY'S TRAINING DEPT -- AS DID ALL PLTS AT MY COMPANY. I; FOR ONE; TOOK THE TRAINING VERY SERIOUSLY; AND SPENT SOME TIME CONSIDERING VARIOUS WAYS TO MAKE MYSELF 'INCURSION-PROOF.' TO ME; THE MOST IMPORTANT LESSON TO COME OUT OF THE TRAINING WAS THAT AN INCURSION CAN HAPPEN TO ANYONE; REGARDLESS OF TRAINING OR EXPERIENCE. NEVERTHELESS; I ALLOWED MY ROUTINE EXPERIENCE WITH THIS 'SLOW; SMALL-TOWN' ARPT TO MAKE ME COMPLACENT. I STRIPPED AWAY ALL OF THE PROCEDURAL 'FAIL-SAFES' I NORMALLY USE TO PROTECT MYSELF AND MY PAX; AND LEFT MYSELF COMPLETELY DEPENDENT ON MY FO TO KEEP ME OUT OF TROUBLE. FROM A CRM PERSPECTIVE; HER DECISION TO NOT TAKE ACTION TO STOP THE ACFT; WHILE REGRETTABLE; IS COMPLETELY UNDERSTANDABLE. AFTER ALL; I'M THE VETERAN WITH HUNDREDS OF HRS OF EXPERIENCE WITH THIS FIELD; AND SHE'S THE 14-MONTH FO. WHY SHOULDN'T SHE BELIEVE THAT I KNOW EXACTLY WHAT I'M DOING? I HAVE RE-COMMITTED MYSELF TO ELEVATING MY SITUATIONAL AWARENESS; AS WELL AS THAT OF MY CREW; DURING ALL PHASES OF FLT; BUT PARTICULARLY DURING TAXI. I'M STILL KICKING MYSELF FOR MAKING THE MISTAKE THAT WAS SUPPOSED TO HAPPEN TO 'OTHER PEOPLE;' NOT TO ME.