It does indeed look exactly like the google image of that bridge, and since Mobile's in that would make sense, but it also looks EXACTLY like the I-255 bridges that connect South St Louis with Illinois--you take these bridges from St Louis and not too far across them is the Belleville exit. In fact, I went over them yesterday. I was just assuming it was them until I saw your post, but now I'm pretty convinced they've been designed by the same engineering firm!