Three in the morning on Euclid Avenue, and the parking lots are empty in the way they only are during a storm. That is the hour Riedlinger property management LLC works, pushing lots into windrows, opening entrances and fire lanes, clearing walkways and salting the corners that glaze over before the doors unlock. Snow in Bangor Township does not fall politely; it comes in off Saginaw Bay in bands and can bury an hour of work in twenty minutes, so the route gets run a second time and a third. By the time the first cars turn in, the asphalt is dark, the curbs are visible and nobody has to give it a thought. That invisibility is the entire point.