Narrative:

I was taxiing south on taxiway a, towards the overrun of runway 8/26 where it crossed runway 17/35. The day earlier I had been cleared south on taxiway a to parking. Taxiing south on taxiway a, I had to cross the hold lines, which I did, and nothing was said about crossing the hold lines. I wondered about that, since I was not sure where runway 8/26 really started. The next night, when I received taxi instructions, I taxied to the hold lines and stopped. I was facing a heavy twin at the opposite hold lines and they were cleared to depart and I was to be the next departure. When I called lubbock tower and received instructions to hold short, I thought that there might be another set of hold short lines at the runway 17/35 and runway 8/26 intersection or somewhere between my position and the start of runway 8/26 -- especially since the yellow taxi line ran straight ahead. When I taxied ahead and turned east, tower asked me if I was on runway 8/26 and I replied no, since I didn't see any white runway lines and I had taxied there on the prior day with no problems. Tower told me I was on the runway and cleared me to depart. There was no conflicting traffic. I think the runway needs to be marked with white lines -- especially where it is also part of a taxiway. I should have also asked for clarification from the tower. Late night departure and general fatigue probably also contributed to just going ahead and taxiing without asking for clarification when in doubt.

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Original NASA ASRS Text

Title: PLT OF BE35-G CROSSES HOLD LINE AT LUB.

Narrative: I WAS TAXIING S ON TXWY A, TOWARDS THE OVERRUN OF RWY 8/26 WHERE IT CROSSED RWY 17/35. THE DAY EARLIER I HAD BEEN CLRED S ON TXWY A TO PARKING. TAXIING S ON TXWY A, I HAD TO CROSS THE HOLD LINES, WHICH I DID, AND NOTHING WAS SAID ABOUT XING THE HOLD LINES. I WONDERED ABOUT THAT, SINCE I WAS NOT SURE WHERE RWY 8/26 REALLY STARTED. THE NEXT NIGHT, WHEN I RECEIVED TAXI INSTRUCTIONS, I TAXIED TO THE HOLD LINES AND STOPPED. I WAS FACING A HVY TWIN AT THE OPPOSITE HOLD LINES AND THEY WERE CLRED TO DEPART AND I WAS TO BE THE NEXT DEP. WHEN I CALLED LUBBOCK TWR AND RECEIVED INSTRUCTIONS TO HOLD SHORT, I THOUGHT THAT THERE MIGHT BE ANOTHER SET OF HOLD SHORT LINES AT THE RWY 17/35 AND RWY 8/26 INTXN OR SOMEWHERE BTWN MY POS AND THE START OF RWY 8/26 -- ESPECIALLY SINCE THE YELLOW TAXI LINE RAN STRAIGHT AHEAD. WHEN I TAXIED AHEAD AND TURNED E, TWR ASKED ME IF I WAS ON RWY 8/26 AND I REPLIED NO, SINCE I DIDN'T SEE ANY WHITE RWY LINES AND I HAD TAXIED THERE ON THE PRIOR DAY WITH NO PROBS. TWR TOLD ME I WAS ON THE RWY AND CLRED ME TO DEPART. THERE WAS NO CONFLICTING TFC. I THINK THE RWY NEEDS TO BE MARKED WITH WHITE LINES -- ESPECIALLY WHERE IT IS ALSO PART OF A TXWY. I SHOULD HAVE ALSO ASKED FOR CLARIFICATION FROM THE TWR. LATE NIGHT DEP AND GENERAL FATIGUE PROBABLY ALSO CONTRIBUTED TO JUST GOING AHEAD AND TAXIING WITHOUT ASKING FOR CLARIFICATION WHEN IN DOUBT.

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.