This is the exit ramp for the UIC-Hastead stop of the "L" -- the commuter train system in Chicago. At this particular point, it goes down the center of I-90 east-west expressway and out of the city. It was a beautiful day for a walk!
Oh I know exactly where this is -- and it always makes me nervous to walk through them! Did you go to UIC today? Your capture of all those scary lines accentuates the idea of being possibly cut into pieces if you try to walk through