A storm crossing Cook County does not arrive everywhere at once; it comes in over the flat southwest and works its way through the township town by town. Snow Command Inc plans around that pattern in Bremen Township, running plow routes, hand-clearing walks and entries, and salting lots and drives from the first flake through the last refreeze. Commercial pavement and a residential driveway want different things, and a night gets built around both. Nothing about it is visible by daylight except the result: black asphalt, squared edges, walks taken down to bare concrete. Then the radar gets checked again.