At three in the morning the section-line roads north of Flint go silent, and that is when the work starts. A+ Outdoors LLC clears snow across Mount Morris township, where storms slide down off Saginaw Bay and fill a driveway apron faster than a yard light can show it. Plowing, shoveling and salting get timed so a drive is open before the first alarm clock goes off. There is a particular satisfaction in the clean black rectangle left behind, corners square, the banks pushed back where they will not creep in again by noon. Come morning, nobody in the house has to think about the snow at all.