Anyone who has spent a winter off Dequindre knows the particular insult of the plow berm — the street gets cleared and the driveway gets sealed shut behind a wall of packed snow. The Guy Outdoor Services takes that personally. Plowing drives and lots, cutting the apron back open, clearing walks and salting the slick spots is the entire trade, carried out in the hours when the rest of the block is still asleep. A driveway that lets a car out on the first try is the measure of it. Warren produces enough snow to test that measure again and again.