I was driving on 376 yesterday on my way to Aldi's and I drove under this bridge. The bridge had these big concrete spanning support arches underneath. But the arches were wrapped in this heavy-duty netting. Upon further inspection I noticed that there were big chunks of concrete that had fallen off and were caught from falling on the road by the netting. It seems as though the netting wasn't good enough, or perhaps they were just being cautious, because they also threw up some 20 ft high concrete pillars and a roof on those pillars which now protects the roadway from falling concrete.
I'm not sure which scares me more, the idea of raining concrete on your highway drive, the fact that Pittsburgh's solution to falling concrete was to catch it with a net and then build a roof over the road, or that there is a bridge falling apart above 376.