Really tough picking one photo! But here goes...
Considering the challenges involved:
The bridge's height,
Distant downtown buildings (turn up really tiny in the image - this is the reason I decided to get a shot with an airplane's light trail, which is the focal point of the capture),
timing (getting light trails of cars - both sides of the freeway - and that of an aircraft - starting at the left edge of the photo, not at any random location in the middle of the image - in the same shot) -
check out my other similar subsequent images in the skydrive location,
dark surroundings,
unhelpful fence along the bridge, and
the worst offender -
lights (bulbs and lamp posts) running along the entirety of the bridge,
I think this photo came out pretty well: https://skydrive.live.com/pagenotfounderror
Image caption:
Southwest, welcome to San Diego.
Captured using a Nokia Lumia 920, and straight out of camera.