Lake-effect out of Whitefish Bay does not knock. It comes over the Sault in bands — six inches while you sleep, another four before the coffee is done. Arctic Solution runs plow routes through those hours: Three Mile Road, the subdivisions off Ashmun, the tight in-town driveways where there is nowhere to put it but up. By the time the plates start clattering downtown, the aprons are open and the walks are down to bare pavement. This is snow removal in a town that measures winter in feet, and the measure of the work is a driveway that looks like nothing ever happened.