At two in the morning, 159th Street is empty enough that you can hear the salt hit the pavement. SPX Lawncare runs snow through Bremen Township — plowing driveways and lots, clearing walks, and spreading salt ahead of the freeze that follows every south-suburban thaw. Winter on this flat land is less a question of depth than of wind and refreeze, and the difference between a good clearing and a bad one shows up at seven the next morning on a slick apron. Getting there before the ice locks in means most people never find out how bad it could have been. That is the whole ambition here: an unremarkable morning.