Snow usually announces itself over the I-75 corridor first, a gray wall sliding down from the northwest while the office parks off Featherstone are still lit and empty. The trucks go out then, headlights full of falling flakes, and by the time the first commuters turn in, the lots are open and the walkways are salted. Work like that gets measured in a sound nobody hears — no scraping, no shuffling, nobody late. In the warm half of the year the same routes are mowed and edged, hedges kept back off the sidewalks, leaves carried away in October. Rolling Auburn Hills ground, sharp weather, and properties that stay presentable through both halves of it.