Lyric discussion by ForNoOne 

Cover art for Michigan lyrics by Milk Carton Kids, The

I think the general theme of this song is talking about what happens when something with a lot of promise turns to crap. The song specifically mentions Pontiac Michigan, "broke down brake lines," and motown records. Pontiac is a suburb of Detroit that once had a GM plant and an car brand named after it..The town still exists but that's it. Detroit is a shell of what it once was after the collapse of the auto industry. Motown was the pinnacle of pop music is the 60's, and as a stand alone record company, doesn't really exist anymore. I'm not sure exactly what "brake lines" are, but my mind goes to railroads for some reason. Anyway, we are told they are broke down anyways, keeping with the theme of stuff going to crap.

Take the feeling of watching the demise of something fantastic, and apply it to a relationship that you are in and there's the song. The relationship was good, now it's crap, there's a tug of what once was every time she calls or knocks on the door unexpectedly, but in the end it's best to let the thing die and move on.

Just my $.02.

@ForNoOne Brake lines could be one of two things: 1) literally brake lines in a car, which if broken down means the car can't stop, or 2) brake assembly lines in an abandoned auto plant, which, given GM's pullout from Pontiac and Detroit, could also be the reference.