By midnight the Memorial Drive lots stand empty and blue-white under the pole lights, and that is when the real shift begins. Yellowstone Landscape runs the overnight side of a Chicopee winter — lots and drives plowed, piles stacked where they will not swallow the parking, entries and walkways shoveled, salt down so the first person through the door in the morning never has to think about it. Storms come in off the valley here and then linger; a lot cleared at eleven often wants clearing again at four. The measure of a night like that is simple — open, treated, and no story to tell about it afterward. Snow and ice work in Chicopee and the surrounding towns.