Ridgefield sits high, and the weather knows it — a storm that has turned to rain down toward the Sound is still coming down white up on the ridge at four in the morning. That is the hour The Rooted Plow keeps: driveways and walkways opened while the town is dark and the plow lights swing along the stone walls. Snow removal is the whole assignment, finished before the first commute and taken up again if the sky is not done. Around Ridgefield and the towns close by, the measure of a night like that is simple — a driveway clear, a path to the door, and nobody late.