Three in the morning on the Southwest Side, and the only things moving are a salt truck out on 95th and a plow blade dropping onto a driveway apron. Oak Lawn Snow plow works these bungalow blocks while the streetlights still hold their orange, opening drives and walks so the first car out at six finds bare concrete waiting. A clipper comes through fast here — three inches and gone by breakfast — and the trick is meeting the storm rather than chasing it. Salt goes down at the storm doors, because a step is where a winter actually turns dangerous. By the time Oak Lawn, Evergreen Park and Chicago Ridge are stirring, the route has already come around once.