Narrative:

While taxiing to the end of the active runway, I came upon black and yellow lines across the taxiway with flashing yellow lights on either end of the lines. Never having seen this arrangement before or even heard of it, I inadvertently crossed this line. The controller immediately stopped me and had me do a 180 degree turn back across the line. At no time was there any incursion on the active runway. Later, checking my airport flight, I could find no reference to this type of line at this airport. If the lights at the line had been red, I would have stopped immediately. If I ever see this situation again, or anything like it, I will certainly ask for guidance by the controller.

Related reports:

Google
 

Original NASA ASRS Text

Title: THE PLT OF AN SMA INSTRUCTED TO HOLD SHORT OF THE RWY DID NOT RECOGNIZE THE YELLOW AND BLACK LINES WITH THE FLASHING YELLOW LIGHTS AT EACH END AS THE HOLD SHORT LINE SO HE CROSSED IT.

Narrative: WHILE TAXIING TO THE END OF THE ACTIVE RWY, I CAME UPON BLACK AND YELLOW LINES ACROSS THE TXWY WITH FLASHING YELLOW LIGHTS ON EITHER END OF THE LINES. NEVER HAVING SEEN THIS ARRANGEMENT BEFORE OR EVEN HEARD OF IT, I INADVERTENTLY CROSSED THIS LINE. THE CTLR IMMEDIATELY STOPPED ME AND HAD ME DO A 180 DEG TURN BACK ACROSS THE LINE. AT NO TIME WAS THERE ANY INCURSION ON THE ACTIVE RWY. LATER, CHKING MY ARPT FLT, I COULD FIND NO REF TO THIS TYPE OF LINE AT THIS ARPT. IF THE LIGHTS AT THE LINE HAD BEEN RED, I WOULD HAVE STOPPED IMMEDIATELY. IF I EVER SEE THIS SIT AGAIN, OR ANYTHING LIKE IT, I WILL CERTAINLY ASK FOR GUIDANCE BY THE CTLR.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.