Narrative:

We landed on runway 7 after making standard self-announced calls. We loaded and started engines. We self-announced taxi from ramp to runway 25. During taxi, we picked up clearance and turned on TCASII, checking for traffic in the pattern. One target noted overhead at 8000 ft. After running checks, we self-announced 'taking runway 25 for takeoff, northwest departure.' ran checks and initiated takeoff. At approximately 80 KTS, lights appeared near the departure end of runway, 12 O'clock position. I stated 'continue.' my first thought was that it was a car on a road outside the airport. On climb out, we determined it was a plane, which had aborted its takeoff. When we asked them on the radio where they came from, they said 'I said I was taxiing (taking?) the active. I'm at 7.' we had not heard him on the radio prior to this transmission. It's possible, though unlikely, that his and our self-announcements were simultaneous, thus neither heard the other. I suspect he did not announce, as we did not hear him on the radio. In retrospect, our decision to continue seems questionable, though an abort would have likely resulted in a collision, or excursion from runway. By the time we knew it was a plane, it was too late to abort. I dislike using uncontrolled fields, and am especially vigilant in looking for traffic at uncontrolled fields. Nevertheless, we came very close to a very bad accident.

Related reports:

Google
 

Original NASA ASRS Text

Title: AN E120 FLC MAKES A TKOF OVER THE TOP OF A DUCHESS THAT HAD STARTED A TKOF ROLL ON THE SAME RWY, OPPOSITE DIRECTION, AT THE NON TWR ARPT AT BQK, GA.

Narrative: WE LANDED ON RWY 7 AFTER MAKING STANDARD SELF-ANNOUNCED CALLS. WE LOADED AND STARTED ENGS. WE SELF-ANNOUNCED TAXI FROM RAMP TO RWY 25. DURING TAXI, WE PICKED UP CLRNC AND TURNED ON TCASII, CHKING FOR TFC IN THE PATTERN. ONE TARGET NOTED OVERHEAD AT 8000 FT. AFTER RUNNING CHKS, WE SELF-ANNOUNCED 'TAKING RWY 25 FOR TKOF, NW DEP.' RAN CHKS AND INITIATED TKOF. AT APPROX 80 KTS, LIGHTS APPEARED NEAR THE DEP END OF RWY, 12 O'CLOCK POS. I STATED 'CONTINUE.' MY FIRST THOUGHT WAS THAT IT WAS A CAR ON A ROAD OUTSIDE THE ARPT. ON CLBOUT, WE DETERMINED IT WAS A PLANE, WHICH HAD ABORTED ITS TKOF. WHEN WE ASKED THEM ON THE RADIO WHERE THEY CAME FROM, THEY SAID 'I SAID I WAS TAXIING (TAKING?) THE ACTIVE. I'M AT 7.' WE HAD NOT HEARD HIM ON THE RADIO PRIOR TO THIS XMISSION. IT'S POSSIBLE, THOUGH UNLIKELY, THAT HIS AND OUR SELF-ANNOUNCEMENTS WERE SIMULTANEOUS, THUS NEITHER HEARD THE OTHER. I SUSPECT HE DID NOT ANNOUNCE, AS WE DID NOT HEAR HIM ON THE RADIO. IN RETROSPECT, OUR DECISION TO CONTINUE SEEMS QUESTIONABLE, THOUGH AN ABORT WOULD HAVE LIKELY RESULTED IN A COLLISION, OR EXCURSION FROM RWY. BY THE TIME WE KNEW IT WAS A PLANE, IT WAS TOO LATE TO ABORT. I DISLIKE USING UNCTLED FIELDS, AND AM ESPECIALLY VIGILANT IN LOOKING FOR TFC AT UNCTLED FIELDS. NEVERTHELESS, WE CAME VERY CLOSE TO A VERY BAD ACCIDENT.

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.