I have seen similar images on line with the arch completed, and a bit more of the first tower in the image. I'm not sure if I'm missing that part of the image because it is inherently better image, or because I expected it to be there. Otherwise it is a strong image.
Obvious use of a tripod, or any other long-term stabilization tool (1-10 *is not the score of the shot though*): 10
Light trails from bus and headlights from cars + sharp architectural surroundings shows a tripod was used.