Narrative:

I was given a progressive taxi to runway 5R due to abnormal routing due to construction. Upon reaching an intersection, I stopped and asked the ground controller to clarify taxi instructions. Upon proceeding straight ahead and looking for my 'next right turn', I was on an inactive runway. My next right turned out to be the active runway (5R). Upon realizing this, I immediately taxied clear. Almost simultaneously, the ground controller realized what had happened and told me to take my next right. A small business jet had just initiated his takeoff roll, and had to abort takeoff. Looking back, there was a right turn just before the runway that came back at about a 140 degree angle. Since I was on a runway (during taxi) rather than a taxiway, the markings for the intersecting runway weren't clear. I had missed the taxiway and turned onto the runway. I believe that I should have stopped again since there was some doubt about my position, however I also believe that the controller should have made her directions clearer, and paid more attention to me since I had just asked for clarification. I also believe that during periods of construction temporary markings should be used for runways and taxiways not normally used for taxiing. A controller should realize that even though they know the airport layout like the back of their hand, most transient pilots don't.

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Original NASA ASRS Text

Title: SMA PLT UNFAMILIAR WITH ARPT TAXIES ONTO ACTIVE RWY. ACFT ABORTS TKOF.

Narrative: I WAS GIVEN A PROGRESSIVE TAXI TO RWY 5R DUE TO ABNORMAL ROUTING DUE TO CONSTRUCTION. UPON REACHING AN INTXN, I STOPPED AND ASKED THE GND CTLR TO CLARIFY TAXI INSTRUCTIONS. UPON PROCEEDING STRAIGHT AHEAD AND LOOKING FOR MY 'NEXT R TURN', I WAS ON AN INACTIVE RWY. MY NEXT R TURNED OUT TO BE THE ACTIVE RWY (5R). UPON REALIZING THIS, I IMMEDIATELY TAXIED CLR. ALMOST SIMULTANEOUSLY, THE GND CTLR REALIZED WHAT HAD HAPPENED AND TOLD ME TO TAKE MY NEXT R. A SMALL BUSINESS JET HAD JUST INITIATED HIS TKOF ROLL, AND HAD TO ABORT TKOF. LOOKING BACK, THERE WAS A R TURN JUST BEFORE THE RWY THAT CAME BACK AT ABOUT A 140 DEG ANGLE. SINCE I WAS ON A RWY (DURING TAXI) RATHER THAN A TAXIWAY, THE MARKINGS FOR THE INTERSECTING RWY WEREN'T CLR. I HAD MISSED THE TAXIWAY AND TURNED ONTO THE RWY. I BELIEVE THAT I SHOULD HAVE STOPPED AGAIN SINCE THERE WAS SOME DOUBT ABOUT MY POS, HOWEVER I ALSO BELIEVE THAT THE CTLR SHOULD HAVE MADE HER DIRECTIONS CLEARER, AND PAID MORE ATTN TO ME SINCE I HAD JUST ASKED FOR CLARIFICATION. I ALSO BELIEVE THAT DURING PERIODS OF CONSTRUCTION TEMPORARY MARKINGS SHOULD BE USED FOR RWYS AND TAXIWAYS NOT NORMALLY USED FOR TAXIING. A CTLR SHOULD REALIZE THAT EVEN THOUGH THEY KNOW THE ARPT LAYOUT LIKE THE BACK OF THEIR HAND, MOST TRANSIENT PLTS DON'T.

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.