The Importance of Elevated Bridges in Cold Cities

To some degree I think what we're thinking of as a sky bridge really has more to do with just external appearance and like what is the stuff underneath it. There are other things that don't quite look exactly like a sky bridge but they clearly serve the same function. The Chicago Pedway is a strong example of a system like this parts of it are elevated but then also Parts of it are completely underground so that you know you don't have to go out into the elements during the winter in cold cities.