A nor'easter comes at New Rochelle sideways, wet and heavy off the water, and by three in the morning North Avenue is one long unbroken white where the plows have not yet been. Big Bens Plowing llc. is awake for that — the truck warm, the blade down, the route running from apartment aprons downtown to the long uphill driveways in the north end. Coastal snow is the difficult kind, dense as poured concrete near the shoreline and lighter with every mile inland, and it has to be moved before the temperature drops and sets it. The measure of a night's work is a stack of driveways that open cleanly at dawn, salted at the pitch and squared off at the mailbox. When the storm finally pulls out over the Sound and the sky goes hard blue, the streets look ordinary again, which is exactly the idea.