I wanted to post about a random issue I’ve discovered now that the Red Line is running again. Whenever I get close to a set of 5000 cars along the Dan Ryan, I get a humming which overpowers any AM radio station I happen to be listening to. I’ve had it happen in two different cars, and on every AM station I’ve tried. The other day I was sitting in traffic, and “heard” the train approach from quite a distance behind me and then the noise went away after it passed. Any idea what it could be? The lighting system perhaps? I think it is also happening at the newly renovated stations but I’m not for sure yet.