At three in the morning the Schoolcraft service drive belongs to the plows. 4 Seasons Property Maintenance is out in that hour, pushing back the night's accumulation across the driveways and lots that flank Livonia's I-96 corridor, well before the first shift arrives. Snow here comes in on a west wind, wet and heavy, and it never picks a convenient hour. The pride is all in the edges — pavement scraped down to the seam, banks stacked where they won't drift back, walkways cut square to the door. By sunrise the asphalt is dark and wet and the day can simply begin.