Freezing rain is Somerville's meanest weather: no drama at all, just a glaze on every step and sidewalk by morning. LC Reliable Services meets it with salt and a plow blade, opening driveways and walkways before that glaze has a chance to set hard. When the thaw finally holds, the same routes need mowing, trimming and a good clearing-out of everything winter left in the beds. Sidewalks in this town get walked — to the train, to Main Street, to school — so a cleared path is not a small thing. Warm months or cold, the job is keeping the ground underfoot in good order.