TXWY TKOF BY A C337 PLT AT LAS.

Narrative

WE RECEIVED THE CURRENT ATIS. AT LAS; THE WX AND VISIBILITY WERE GOOD VFR. CLRNC DELIVERY GAVE US HDG; ALT; DEP FREQ AND SQUAWK CODE. GND CLRED US TO THE RWY AREA SHORT OF RWY 19R ON TXWY H. AFTER OUR RUN-UP; I CONTACTED THE TWR AND WAS GIVEN A TKOF CLRNC. I DIDN'T HAVE AN ARPT DIAGRAM; BUT THE SIGNAGE IN FRONT OF ME SAID RWY 19R/1L. I HAD JUST TAXIED DOWN A LARGE TXWY PARALLEL TO RWY 19R SO WHEN CLRED I PULLED ONTO WHAT I THOUGHT WAS RWY 19R. AS I APCHED MY ROTATION SPD; BOTH I AND THE TWR REALIZED WHAT I HAD DONE. THERE WERE NO OTHER PLANES OR VEHICLES NEAR OR ON THE TXWY; SO THE TKOF AND DEP WERE UNEVENTFUL. I RECENTLY TOOK THE FAA TAXI/LNDG AND ARPT SIGNAGE PROGRAM AND ONLY MISSED 1 QUESTION. I FLY FREQUENTLY INTO CLASS B ARPTS; HAVE FLOWN FOR OVER 3 DECADES AND NEVER HAD A VIOLATION OR WARNING. I COMPLETED TYPE PROFICIENCY; BFR AND IFR RECURRENCY IN AUGUST/04 AND PASSED VERY EASILY. I HAVE NO EXCUSE; EXCEPT TO SAY I FELT THE RWY 19R/1L SIGN ON THAT RWY TO BE CONFUSING. I SHOULD HAVE REQUESTED CONFIRMATION THAT I WAS INDEED ON RWY 19R AND ALTHOUGH THE TWR CTLR IS VERY BUSY; I WOULD HOPE HE WOULD SEE A PLANE OVER 1/2 WAY DOWN THE TXWY.