I daily have the heebie geeebies when I cross over a bridge span that must be I'm guessing ~180' high (~55m.) and no columns to support it. I've crossed when a heavy tanker truck, 2 city transit buses and several cars where crossing it simultaneously and I never detected any sort of weird stuff like swaying or dipping in the structure. If this bridge falls it's going to be a one way trip to death and doom.