I thought I would take a closer look at the stuff that I pass by on the way to work, leaving buildings aside for a change. These are basically control nodes, which tie into much larger systems stretching through the city. I had a idea for a project which explores the utlities of Chicago with huge illustrated sections extending up into the buildings and down into the sub-systems. I haven't given up on that, but I've realized how much work it would require. And it can wait until I can track down some good documentation of those systems.
The mysterious-looking thing on top of the electrical box below is a coffee cup someone left behind. I may try to rework that drawing and leave the coffee cup out, since it confuses things and doesn't add anything. Besides atmosphere, of course.