Well whoever squiggle is, they don't know where they are. That is Detroit rail bridge, moved from it's original location to another part of Salford Quays to be used as a footbridge over Dock 9. This area is residential and nothing to do with Media City. Media City is on Dock 10, a separate part of Salford Quays. Lovely in the daytime, I wouldn't go near it at night.
If she was wandering around that area late at night on her own, I am surprised she wasn't mugged. The area is nice and full of expensive apartments, but that particular bride is a notorious gathering spot for gangs from the adjacent Ordsall Estate. Not "a bit rowdy teenagers" gangs, drug running, gun carrying, knife wielding gangs.