That's totally understandable, however, according to the photo, this u-turn happened right in front of taxiway L2 which is the last intersection before the end of runway 30 and not 12. At this end of the airport, there are taxiways on both sides of the runway. L2 goes across the runway and connects both taxiways, in which case, this plane could have crossed the runway and taxied full length on the other side. In addition, I pass this airport on the 405 every day and I have not noticed any construction in recent history.
There is also about 8 or 9000 feet of runway available at taxiway L2 which would negate the need for the extra 75 or so feet that it seems that this plane would have added by doing this turn.
If, for some reason, neither taxiway on either side of the runway was available and the A320 absolutely needed 12,000 feet of runway to takeoff, why did the pilot not taxi all the way to the end of 30 which is about another 2 or 300 feet down?
Thanks for the reply.
I would guess that, maybe, this plane was holding in position on runway 12 when ATC cancelled takeoff clearance, redirected the flight to takeoff runway 30, and just to save time, taxied down the runway, spun around and departed.
I really need to talk to that flight crew...