Freezing rain is the quiet emergency of a Long Island winter — no drama, no drifts, just a hard clear shell over every driveway by four in the morning. KDM Landscaping and Snow Removal is out ahead of it, plowing drives and lots, shoveling walks and stoops, spreading salt and sand where the slope wants to send a car sideways. Headlights strung down the William Floyd Parkway say the same thing every storm: people have to get somewhere, ice or no ice. Repeat passes through a long storm keep an entrance from disappearing between pushes. Clean pavement and a walkable path to the door — that is the measure of a night's work here.